Emerson Ezr Series Pressure Reducing Regulator Instruction Manual

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Type EZR

D102600X012

Instruction Manual

Form 5468

March 2014

www.fisherregulators.com

Type EZR Pressure Reducing Regulator

Introduction

Scope of the Manual

This instruction manual provides installation,

startup, adjustment, maintenance and parts ordering

information for Type EZR pressure reducing

regulator, Type 112 restrictor, 161AY, 161EB and

PRX Series pilot. Any accessories used with this

regulator are covered in their respective

instruction manuals.

Product Description

The Type EZR pilot-operated, pressure reducing

regulators are used for natural gas, air or other

non-corrosive gas applications and include a

Type 112 restrictor and a 161EB, 161AY or PRX Series

pilot. For applications that have high-pressure drops,

using a Type 161AYM or 161EBM monitor pilot will

increase the accuracy of the regulator.

Figure 1. Type EZR Pressure Reducing Regulator

Failure to follow these instructions or

to properly install and maintain this

equipment could result in an explosion

and/or  re causing property damage and

personal injury or death.

Fisher® regulators must be installed,

operated and maintained in accordance

with federal, state and local codes, rules

and regulations and Emerson Process

Management Regulator Technologies, Inc.

(Regulator Technologies) instructions.

If the regulator vents gas or a leak

develops in the system, service to the unit

may be required. Failure to correct trouble

could result in a hazardous condition.

Call a gas service person to service the

unit. Only a quali ed person must install

or service the regulator.

!

WARNING

TYPE EZR REGULATOR

W7399

W7430

161AY SERIES PILOT

TYPE PRX PILOT

W8346

Type EZR

2

Main Valve Body Sizes, End Connection Styles

and Structural Design Ratings(1)(2)

See Table 1

Maximum Inlet Pressures and Pressure Drops(1)

Main Valve: See Table 10

Pilots: See Table 3

Restrictor: 1500 psig / 103 bar

Outlet (Control) Pressure Ranges

See Table 2

Main Valve Plug Travel

NPS 1, 1-1/4 x 1, 2 x 1 /

DN 25, 32 x 25, 50 x 25: 0.37-inch / 9.4 mm

NPS 2 / DN 50: 0.68-inch / 17 mm

NPS 3 / DN 80: 0.98-inch / 25 mm

NPS 4 / DN 100: 1.19-inch / 30 mm

NPS 6 / DN 150: 1.5-inch / 38 mm

NPS 8 / DN 200: 1.75-inch / 44 mm

Minimum and Maximum Differential Pressures(1)

See Tables 4 and 10

Proportional Bands

See Table 2

Temperature Capabilities(1)

See Table 8

Pressure Registration

External

Options

  •  Integral Slam-Shut Device

  •  Pre-piped Pilot Supply and Pilot Bleed

  •  Travel Indicator

  •  Inlet Strainer

  •  Type 252 Pilot Supply Filter

  •  Trim Package

  •  Restricted Capacity Trim

  •  Pilot Diaphragm for Pressure Loading

  •  Quick Disconnect Union in Pilot Mounting

Pilot Type Descriptions

Type 161AY—Low-pressure pilot with an outlet 

pressure range of 6 inches w.c. to 7 psig /

15 mbar to 0.48 bar. Pilot bleeds (exhausts)

downstream through the sense (control) line.

Type 161AYM—The monitor version of the Type 161AY

pilot. The pilot bleed (exhaust) is isolated from the sense

(control) line. This pilot is used in monitoring systems

requiring an isolated pilot bleed (exhaust).

Type 161EB—High accuracy pilot with an outlet

pressure range of 5 to 350 psig / 0.34 to 24.1 bar.

Pilot bleeds (exhausts) downstream through the sense

(control) line.

Type 161EBM—The monitor version of the Type 161EB

pilot. The pilot bleed (exhaust) is isolated from the sense

(control) line. This pilot is used in monitoring systems

requiring an isolated pilot bleed (exhaust).

Type PRX/120—Outlet pressure range of 14.5 to

435 psig / 1.00 to 30.0 bar. The Type PRX/120 can be

used as the pilot on single-stage pressure reducing

regulators or as the monitor pilot or working pilot in 

wide-open monitor systems. The Type PRX has a

double diaphragm which provides increased accuracy

and sensitivity, an integral restrictor adjustment which

allows adjustable opening and closing speeds and

a damper adjustment which adjusts inlet pressure

variability and loading pressure oscillations.

Type PRX/120-AP—Outlet pressure range of 435 to

1000 psig / 30.0 to 69.0 bar. The Type PRX/120-AP

can be used as the pilot on single-stage pressure

reducing regulators, as the monitor pilot or working 

pilot in wide-open monitor systems or as the working 

pilot for monitoring and working regulators in the 

working monitoring systems.

Type PRX/125—Identical to the Type PRX/120 except

the restriction screw is removed. The Type PRX/125

can only be used as the monitor override pilot on

working monitor applications.

Type PRX/125-AP—Identical to the Type PRX/120-AP

except the restriction screw is removed. The

Type PRX/125-AP can only be used as the monitor

override pilot on working monitor applications.

Note

For applications requiring extremely

tight control, using a Type 161AYM or

161EBM monitor pilot will increase the

accuracy of the regulator.

1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.

2. End connections for other than ASME standard can usually be provided, contact your local Sales Ofce for assistance.

Specications

Specications for the Type EZR regulator are shown below. The control spring range for the pilot is marked on the 

spring case of 161EB Series pilots and on the nameplate of 161AY and PRX Series pilots. Other information for the

main valve appears on the nameplate.

Type EZR

3

MAIN VALVE BODY SIZE, NPS / DN MAIN VALVE BODY MATERIAL END CONNECTION STYLES(1) STRUCTURAL DESIGN

RATING(2)

2 x 1, 2, 3, 4 and 6 /

50 x 25, 50, 80, 100 and 150 Cast iron

NPT (NPS 2 x 1 and 2 / DN 50 x 25 and 50 only) 400 psig / 27.6 bar

CL125 FF 200 psig / 13.8 bar

CL250 RF 500 psig / 34.5 bar

1, 1-1/4 x 1(3), 2 x 1, 2, 3, 4,

6 x 4(4), 8 x 4(4), 6, 8 x 6(4) and 12 x 6(4) /

25, 32 x 25, 50 x 25, 50, 80,

100,150 x 100, 200 x 100, 150,

200 x 150 and 300 x 150

WCC Steel

NPT or SWE (NPS 1, 2 x 1 and 2 /

DN 25, 50 x 25 and 50 only) 1500 psig / 103 bar

CL150 RF 290 psig / 20.0 bar

CL300 RF 750 psig / 51.7 bar

CL600 RF or BWE  1500 psig / 103 bar

8 / 200 LCC Steel

CL150 RF 290 psig / 20.0 bar

CL300 RF 750 psig / 51.7 bar

CL600 RF 1500 psig / 103 bar

  1. Ratings and end connections for other than ASME standard can usually be provided. Contact your local Sales Ofce for assistance.

2. See Tables 3, 8, 10 and 11 for diaphragm materials and additional pressure ratings.

3. Available in steel NPT only.

4. NPS 6 x 4, 8 x 4, 8 x 6, 12 x 6 / DN 150 x 100, 200 x 100, 200 x 150, 300 x 150 Types EZR and 399 bodies are not the same as the EW valve bodies and are not interchangeable.

Table 1. Main Valve Body Sizes, End Connection Styles and Body Ratings

TYPE

MAXIMUM INLET

PRESSURE

MAXIMUM EMERGENCY OUTLET

PRESSURE OR MAXIMUM

EMERGENCY SENSE PRESSURE(1)

MAXIMUM OUTLET

PRESSURE

MAXIMUM BLEED

(EXHAUST) PRESSURE

FOR MONITOR PILOTS

MAXIMUM SENSE

(CONTROL) PRESSURE

FOR MONITOR PILOTS

psig bar psig bar psig bar psig bar psig bar

161AY 150 10.3 150 10.3 150 10.3 - - - - - - - -

161EB 1500 103 1200 82.7 750 51.7

161AYM 150 10.3 150 10.3 - - - - 150 10.3 150 10.3

161EBM 1500 103 1200 82.7 1500 103 750 51.7

PRX Series 1480 102 1480 102 1480 102 1480 102 1480 102

  1. Maximum pressure to prevent the casings from bursting during abnormal operation (leaking to atmosphere and internal parts damage may occur).

Table 3. Pilot Pressure Ratings

Table 2. Outlet (Control) Pressure Ranges, Proportional Bands and Pilot Control Spring Information

TYPE

OUTLET (CONTROL)

PRESSURE RANGE PROPORTIONAL BAND(1)(3)

PILOT CONTROL SPRING INFORMATION

Part Numbers Color Code

Wire Diameter Free Length

psig bar psig bar Inch mm Inch mm

161AY or

161AYM

6 to 15 inches w.c.

0.5 to 1.2

1.2 to 2.5

2.5 to 4.5

4.5 to 7

15 to 37

34 to 83

83 mbar to 0.17 bar

0.17 to 0.31

0.31 to 0.48

1-inch w.c.

1-inch w.c.

0.5

0.5

0.5

3 mbar(2)

3 mbar(2)

34 mbar(2)

34 mbar(2)

34 mbar(2)

1B653927022

1B537027052

1B537127022

1B537227022

1B537327052

Olive drab

Yellow

Light green

Light blue

Black

0.105

0.114

0.156

0.187

0.218

2.67

2.90

3.96

4.75

5.54

3.75

4.31

4.13

3.94

4.13

95.2

109

105

100

105

161EB or

161EBM

5 to 15

10 to 40

30 to 75

70 to 140

130 to 200

200 to 350

0.34 to 1.0

0.69 to 2.8

2.1 to 5.2

4.8 to 9.7

9.0 to 13.8

13.8 to 24.1

0.5

0.5

0.6

1.3

1.5

3

34 mbar(2)

34 mbar(2)

41 mbar(2)

90 mbar(2)

0.10(2)

0.21(2)

17B1260X012

17B1262X012

17B1259X012

17B1261X012

17B1263X012

17B1264X012

White

Yellow

Black

Green

Blue

Red

0.120

0.148

0.187

0.225

0.262

0.294

3.05

3.76

4.75

5.71

6.65

7.47

3.75

3.75

4.00

3.70

3.85

4.22

95.2

95.2

102

94.0

97.8

107

161EB(4) 30 to 300 2.1 to 20.7 6 0.41 15A9258X012 Green 0.243 6.17 1.88 47.7

TYPE

OUTLET (CONTROL)

PRESSURE RANGE ACCURACY CLASS (AC)(1)

PILOT CONTROL SPRING INFORMATION

Part Numbers Color Code

Wire Diameter Free Length

psig bar Inch mm Inch mm

PRX/120

PRX/125

14.5 to 26

23 to 44

41 to 80

73 to 123

1.00 to 1.8

1.6 to 3.0

2.8 to 5.5

5.0 to 8.5

2.5%

2.5%

2.5%

2.5%

M0255240X12

M0255230X12

M0255180X12

M0255220X12

Yellow

Green

Blue

Black

0.110

0.126

0.138

0.157

2.79

3.20

3.50

3.99

2.16 54.9

116 to 210

203 to 334

319 to 435

8.0 to 14.5

14.0 to 23.0

22.0 to 30.0

1%

1%

1%

M0255210X12

M0255200X12

M0255860X12

Silver

Gold

Aluminum

0.177

0.197

0.236

4.50

5.00

5.99

2.16

2.00

2.00

54.9

50.8

50.8

PRX/120-AP

PRX/125-AP 435 to 1000 30.0 to 69.0 1% M0273790X12 Clear 0.335 8.51 3.93 99.8

  1. Proportional band and Accuracy Class include outlet pressure drop plus hysteresis (friction), but do not include lockup.

2. Proportional band was determined with a pressure drop ranging from 50 to 150 psig / 3.5 to 10.3 bar. Approximately double the proportional band if the pressure drop is less than

50 psig / 3.5 bar.

  3. With Type 112 restrictor set on 2. With Type PRX restrictor turn the restrictor screw one turn counterclockwise from fully seated.

  4. Should only be used as the intermediate reduction pilot on the Type EZR worker/monitor systems.

Type EZR

4

Table 4. Main Valve Minimum Differential Pressures(1)

Principle of Operation

As long as the outlet (control) pressure is above the

outlet pressure setting, the pilot valve plug or disk 

remains closed (Figure 2). Force from the main spring,

in addition to inlet pressure bleeding through the

Type 112 restrictor (the restrictor is integral in the

PRX Series pilots), provides downward loading

pressure to keep the main valve diaphragm and plug 

assembly tightly shutoff.

When the outlet pressure decreases below the pilot

outlet pressure setting, the pilot plug or disk assembly 

opens. Loading pressure bleeds downstream through 

the pilot faster than it can be replaced through the

Type 112 restrictor. This reduces loading pressure on

top of the main valve diaphragm and plug assembly.

The force imbalance on the diaphragm allows the inlet

pressure to overcome the loading pressure and main

spring force and open the Type EZR diaphragm and

plug assembly.

As the outlet pressure rises toward the outlet pressure

setting, it compresses the pilot diaphragm against the

pilot control spring and allows the pilot valve plug or

disk close. Loading pressure begins building on the 

Type EZR diaphragm and plug assembly. The loading

pressure, along with force from the main spring,

pushes the diaphragm and plug assembly onto the

tapered-edged seat, producing tight shutoff.

MAIN VALVE

BODY SIZE,

NPS / DN

MAIN SPRING PART

NUMBER AND

COLOR CODE

DIAPHRAGM

MATERIAL

MINIMUM DIFFERENTIAL, PERCENT OF CAGE CAPACITY

FOR 90% CAPACITY FOR 100% CAPACITY

100% Trim 60% Trim 30% Trim 100% Trim 60% Trim 30% Trim

psi bar psi bar psi bar psi bar psi bar psi bar

1 and 1-1/4 x 1 /

25 and 32 x 25

19B2400X012, Light Blue 17E68 and 17E88 24 1.7 29 2.0 31 2.2 24 1.7 31 2.2 40 2.8

GE12727X012, Black 17E97 35 2.5 38 2.7 42 2.9 35 2.5 39 2.7 52 3.6

17E68 and 17E88 30 2.1 35 2.4 39 2.7 30 2.1 36 2.5 52 3.6

19B2401X012,

Black with White Stripe(3) 17E88 and 17E97 43 3.0 50 3.4 56 3.9 43 3.0 53 3.7 68 4.7

2 x 1 / 50 x 25

19B2400X012, Light Blue 17E68 and 17E88 24 1.7 29 2.0 31 2.2 24 1.7 31 2.2 40 2.8

19B2401X012,

Black with White Stripe

17E97 43 3.0 50 3.4 56 3.9 43 3.0 53 3.7 68 4.7

17E68 and 17E88 43 3.0 50 3.4 56 3.9 43 3.0 53 3.7 68 4.7

GE12501X012,

Red Stripe(3) 17E97 68 4.7 73 5.0 88 6.1 72 5.0 81 5.6 102 7.0

2 / 50

19B0951X012, Yellow(2) 17E68 and 17E88 12 0.83 15 1.0 15 1.0 12 0.83 25 1.7 20 1.4

18B2126X012, Green 17E97 24 1.7 25 1.7 26 1.8 24 1.7 30 2.1 37 2.6

17E68 and 17E88 18 1.2 20 1.4 22 1.5 19 1.3 26 1.8 28 1.9

18B5955X012, Red(3)

GE05504X012, Purple(3) 17E88 and 17E97 29 2.0 29 2.0 31 2.1 31 2.1 35 2.4 43 3.03

3 / 80

T14184T0012, Yellow(2) 17E68, 17E88 and 17E97 16 1.1 19 1.3 24 1.7 23 1.6 23 1.6 29 2.0

19B0781X012, Light Blue 17E97 23 1.6 23 1.6 23 1.6 23 1.6 23 1.6 25 1.7

17E68 and 17E88 21 1.5 22 1.5 28 1.9 28 1.9 28 1.9 33 2.3

19B0782X012, Black(3) 17E88 and 17E97 32 2.2 33 2.3 43 3.0 38 2.6 38 2.6 50 3.4

4, 6 x 4 and, 8 x 4 /

100, 150 x 100

and 200 x 100

T14184T0012, Yellow(2) 17E68, 17E88 and 17E97 10 0.69 12 0.83 14 0.97 25 1.7 25 1.7 25 1.7

18B8501X012, Green 17E97 16 1.1 17 1.2 21 1.5 34 2.3 34 2.3 34 2.3

17E68 and 17E88 16 1.1 17 1.2 20 1.4 30 2.1 30 2.1 30 2.1

18B8502X012, Red(3) 17E88 and 17E97 21 1.5 24 1.7 26 1.8 40 2.8 40 2.8 40 2.8

6, 8 x 6 and

12 x 6 /

150, 200 x 150

and 300 x 150

19B0364X012, Yellow(2) 17E97 10 0.69 11 0.76 14 0.97 12 0.83 16 1.1 16 1.1

17E88 10 0.69 13 0.90 13 0.90 12 0.83 21 1.5 21 1.5

19B0366X012, Green 17E97 14 0.97 22 1.5 22 1.5 19 1.3 29 2.0 29 2.0

17E88 17 1.2 21 1.5 21 1.5 20 1.4 36 2.5 36 2.5

19B0365X012, Red(3) 17E88 and 17E97 23 1.6 29 2.0 29 2.0 30 2.1 41 2.8 41 2.8

8 / 200

GE09393X012, Yellow(2)

17E97

16 1.1

- - - - - - - -

19 1.3

- - - - - - - -GE09396X012, Green 20 1.4 23 1.6

GE09397X012, Red(3) 26 1.8 30 2.1

1. See Table 1 for structural design ratings, Table 3 for pilot ratings and Table 10 for maximum pressure ratings.

2. The white and yellow springs are only recommended for inlet pressures under 100 psig / 6.9 bar.

  3. The red, black, purple, red stripe and black with white stripe springs are only recommended for applications where the maximum inlet pressure can exceed 500 psig / 34.5 bar.

Type EZR

5

Figure 2. Type EZR Operational Schematic

TYPE 252 SUPPLY FILTER

TYPE PRX PILOT

TYPE EZR WITH PRX SERIES PILOT AND TYPE 252 FILTER

RESTRICTOR DAMPER

W7438

B2625_2

161AY SERIES PILOT

TYPE 112 RESTRICTOR

TYPE 252 PILOT

SUPPLY FILTER

161EB SERIES PILOT

MAIN SPRING

DIAPHRAGM AND

PLUG ASSEMBLY

TYPE EZR WITH TYPES 161EB PILOT, 112 RESTRICTOR AND 252 FILTER

PORT S

PORT B

PORT A

PORT L

E0790

INLET PRESSURE

OUTLET PRESSURE

ATMOSPHERIC PRESSURE

LOADING PRESSURE

2

U

N

R

S

T

A

R

T

4

6

8

FLOW DIRECTION

MAIN SPRING

DIAPHRAGM AND

PLUG ASSEMBLY

FLOW DIRECTION

Type EZR

6

161 SERIES SINGLE PILOT INSTALLATION WITH PILOT EXHAUST INTO CONTROL LINE

BLOCK VALVE BLOCK VALVE

OUTLET

HAND VALVE

ALTERNATE CONTROL LINE

CONTROL LINE

161 SERIES PILOT

RESTRICTOR

SUPPLY PRESSURE LINE

INLET

B2605_A

161 SERIES SINGLE PILOT INSTALLATION WITH SEPARATE PILOT EXHAUST LINE

BLOCK VALVE BLOCK VALVE

OUTLET

HAND VALVE

ALTERNATE CONTROL LINE

CONTROL LINE

161 SERIES

PILOT

RESTRICTOR

SUPPLY PRESSURE LINE

INLET

PILOT

EXHAUST

B2605_B

Figure 3. Typical Type EZR Single Installation Schematics

BLOCK VALVE BLOCK VALVE

OUTLET

INLET

SUPPLY PRESSURE LINE TYPE PRX PILOT

PILOT

EXHAUST HAND VALVE

ALTERNATE CONTROL LINE

CONTROL LINE

TYPE PRX SINGLE-PILOT INSTALLATION WITH SEPARATE PILOT EXHAUST LINE

Type EZR Installation

!

WARNING

Personal injury, equipment damage or

leakage due to escaping gas or bursting

of pressure-containing parts may result

if this regulator is overpressured or is

installed where service conditions could

exceed the limits given in Speci cations

section on page 2 or where conditions

exceed any ratings of the adjacent piping

or piping connections.

To avoid such injury or damage, provide

pressure-relieving or pressure-limiting

devices (as required by the appropriate

code, regulation or standard) to prevent

service conditions from exceeding limits.

Additionally, physical damage to the

regulator could break the pilot off the

main valve, causing personal injury and

property damage due to escaping gas.

To avoid such injury and damage, install

the regulator in a safe location.

Type EZR

7

All Installations

The robust design of the Type EZR allows this regulator

to be installed indoors or outdoors. When installed

outdoors, the Type EZR does not require protective

housing. This regulator is designed to withstand the

elements. The powder paint coating protects against

minor impacts, abrasions and corrosion.

When installed indoors, no remote venting is required

except on the pilot spring case. This regulator can

also be installed in a pit that is subject to ooding 

by venting the pilot spring case above the maximum

possible ood level so the pilot setting can be 

referenced at atmospheric pressure.

  1.  Only personnel qualied through training and 

experience should install, operate and maintain a

regulator. Before installation, make sure that there is 

no damage to or debris in the regulator. Also, make 

sure that all tubing and piping are clean

and unobstructed.

Note

The Type EZR optional inlet strainer is

intended to prevent occasional large

particles from entering the main valve.

If the gas contains continuous particles,

upstream ltration is recommended.

When using an inlet strainer (key 23), do

not use the shim (key 23) and vice versa.

2. Type EZR regulator may be installed in any

orientation, as long as ow through the regulator 

matches the direction of the arrow on the main

valve body. However, for easier maintenance,

install the regulator with the bonnet up.

CAUTION

When installing a Type EZR trim package

in an existing E-body, make sure ow is

up through the center of the cage and

down through the cage slots. In some

cases, correct ow path is achieved

by removing the body from the line

and turning it around. If this is done,

change the ow arrow to indicate the

correct direction. Damage may result

if ow is not in the correct direction.

After assembly, check the regulator for

shutoff and leakage to atmosphere.

Types EZR/399 restricted trim bodies

(NPS 6 x 4, 8 x 4, 8 x 6 and 12 x 6 /

DN 150 x 100, 200 x 100, 200 x 150 and

300 x 150) are different than EW valve

bodies and are not interchangeable.

Install trims only in correct restricted

trim bodies.

3. The standard pilot mounting position is as shown in

Figure 1. Other mounting positions are available.

4. Apply a good grade of pipe compound to the external

pipeline threads for a threaded body or use suitable

line gaskets for a anged body. When installing butt 

weld end connections, remove trim before welding

and make sure to use approved welding practices. 

Use approved piping procedures when installing 

the regulator.

CAUTION

A regulator may vent some gas to the

atmosphere. In hazardous or ammable

gas service, vented gas may accumulate

and cause personal injury, death or

property damage due to re or explosion.

Vent a regulator in hazardous gas service

to a remote, safe location away from

air intakes or any hazardous location.

Protect the vent line or stack opening

against condensation or clogging.

5. A clogged pilot spring case vent may cause the

regulator to function improperly. To prevent plugging

(and to keep the spring case from collecting moisture, 

corrosive chemicals or other foreign material) point

the vent down, orient it to the lowest possible point

on the spring case or otherwise protect it. Inspect the

vent regularly to make sure it has not been plugged. 

To remotely vent a spring case, remove the vent and

install obstruction-free tubing or piping into the

1/4 NPT vent tapping. Provide protection on a remote

vent by installing a screened vent cap onto the remote

end of the vent pipe. The 161AY Series pilot has a

vent restriction (key 55, Figure 20) to enhance low 

ow stability. Do not remove this restriction.

!

WARNING

To avoid freeze-up because of pressure

drop and moisture in the gas, use

antifreeze practices, such as heating the

supply gas or adding a de-icing agent to

the supply gas.

Type EZR

8

6. As shown in Figure 3, run a supply pressure line

from the upstream pipeline to the restrictor inlet

(use 3/8 NPT outer diameter tubing or larger).

Install a Type 252 pilot supply lter upstream of the  

restrictor, if needed, to keep the supply source 

from clogging the restrictor or pilot. Inspect and

clean this lter regularly to make sure it has not 

been plugged.

7. Install a downstream pressure control line (as

shown in the appropriate view of Figure 3) to the

pilot control line connection. Connect the other 

end of the control line at a minimum of 8 to 10 pipe

diameters downstream of the regulator in a straight

run of pipe. Do not place a control line connection in

a turbulent area, such as in or directly downstream

of a swage or elbow. Signicant restrictions in the 

control line can prevent proper pressure registration.

When using a hand valve, it should be a full ow 

valve, such as a full port ball valve. With a

Type 161EBM or 161AYM pilot, run a downstream

exhaust bleed line to the downstream bleed line

connection in the pilot body assembly.

8. Good piping practices usually require swaging up

to larger downstream piping to obtain reasonable

downstream uid velocity. 

Wide-Open Monitor Installations

1. Follow the procedures in the All Installations section

and then continue with step 2 of this section.

2. Pilot supply for the downstream monitoring regulator

must be obtained between the two regulators as

s

hown in Figure 4. With this arrangement, the

downstream monitoring regulator diaphragm

changes position with every load change. For sizing

purposes, add the minimum differential pressure

for each regulator together to establish the required

pressure drop across the station. System lock-up 

pressure is equal to the setpoint of the working 

regulator pilot when a Type 161EBM or a

Type 161AYM is used on an upstream regulator,

otherwise lock-up pressure is equal to monitor pilot 

lock-up pressure.

Working Monitor Installations

On working monitor installations, the working monitor 

regulator is always upstream and acts as a rst-stage 

regulator through the working pilot during normal 

operation. This arrangement allows the working 

monitor’s performance to be observed at all times.

Then, should the second-stage regulator fail open,

the working monitor regulator assumes the entire 

pressure reduction function of the system through the

monitoring pilot.

Use the following procedure when installing a working 

monitor system.

1. Follow the procedures in the All Installations

section and then continue with step 2 of

this section.

2. Pilot supply pressure for the downstream

Type EZR regulator must be made directly

upstream of the Type EZR using

intermediate pressure.

  3.  Signicant restrictions in the control line can 

prevent proper pressure registration. Connect the 

control line a minimum of 8 to 10 pipe diameters

downstream of the regulator in a straight run of

pipe. Do not make the control line connection in a 

turbulent area, such as in or directly downstream

of a swage or elbow. When used, a hand valve

should be a full ow valve such as a full port 

ball valve.

4. Table 9 gives the spread between normal

distribution pressure and the minimum pressure at

which the monitor pilot can be set to take over if 

the working regulator fails open.

5. Table 4 shows the minimum differential pressure

requirements across an individual regulator.

Because this application uses a rst-stage 

and second-stage pressure reduction, add the

minimum differential pressure for each regulator

together to establish the required pressure drop

across the station. Do not exceed maximum pilot

ratings given in Table 3.

Type EZR/PRX Working Monitor

On working monitor installations, the working monitor 

regulator is always upstream and acts as a rst-stage 

regulator through the working pilot during normal 

operation. This arrangement allows the working 

monitor’s performance to be observed at all times.

Then, should the second-stage regulator fail open,

the working monitor regulator assumes the entire 

pressure reduction function of the system through the

monitoring pilot. Use the following procedure when 

installing a working monitor system.

As shown in Figure 5, run a supply pressure line

(use 3/8 NPT outer diameter tubing or larger) from the

upstream pipeline to the inlet (Port S) of the upstream

Type PRX-120 pilot. Install a Type 252 pilot supply

lter upstream of the pilot, if needed, to keep the 

supply source from clogging the restrictor in the pilot.

Inspect and clean this lter regularly to make sure it 

has not been plugged.

Connect the loading port (Port L) of the upstream 

Type PRX-120 pilot to the bonnet of the upstream

Type EZR regulator. Connect the “B” port of the upstream 

Type PRX-120 pilot to the “S” port of the upstream 

Type EZR

9

BLOCK VALVE UPSTREAM REGULATOR DOWNSTREAM

REGULATOR BLOCK VALVE

OUTLET

INLET

SUPPLY

PRESSURE LINE

PILOT

EXHAUST

TYPE PRX

PILOT SUPPLY

PRESSURE

LINE

TYPE PRX

PILOT

CONTROL LINE ALTERNATE

CONTROL LINE

HAND

VALVE

HAND

VALVE

Figure 4. Typical Type EZR Monitoring System Installation Schematics

TYPE PRX WORKING MONITOR SYSTEM INSTALLATION

CONTROL LINE

TYPE PRX WIDE-OPEN MONITORING SYSTEM INSTALLATION (UPSTREAM OR DOWNSTREAM)

BLOCK VALVE MONITOR REGULATOR

WORKING

REGULATOR BLOCK VALVE

OUTLET

INLET

SUPPLY

PRESSURE LINE

TYPE PRX-120

WORKING PILOT

TYPE PRX-125

MONITOR PILOT

SUPPLY

PRESSURE

LINE

ALTERNATE

CONTROL LINE

HAND

VALVE

HAND

VALVE

L(1)

L

A

A

S

S

B

B

(1) PLUGGED

161 SERIES WORKING MONITORING SYSTEM INSTALLATION

B2605_D

BLOCK VALVE BLOCK VALVE

OUTLET

HAND

VALVE

HAND VALVE

ALTERNATE

CONTROL LINE

CONTROL LINE

161 SERIES

PILOT

RESTRICTOR

SUPPLY

PRESSURE

LINE

CONTROL LINE

161 SERIES WORKING PILOT

161 SERIES

MONITOR PILOT

RESTRICTOR

SUPPLY

PRESSURE LINE

MONITOR REGULATOR WORKING

REGULATOR

INLET

161 SERIES WIDE-OPEN MONITORING SYSTEM INSTALLATION (UPSTREAM OR DOWNSTREAM)

B2605_C

BLOCK VALVE BLOCK VALVE

UPSTREAM REGULATOR DOWNSTREAM

REGULATOR

OUTLET

HAND VALVE

HAND

VALVE

ALTERNATE

CONTROL LINE

CONTROL LINE

CONTROL

LINE

161 SERIES

PILOT

RESTRICTOR

SUPPLY

PRESSURE

LINE

PILOT

EXHAUST

161 SERIES PILOT

RESTRICTOR

SUPPLY

PRESSURE LINE

INLET

Type EZR

10

Type PRX-125 pilot. Connect the “A” port (located on the 

underside of the pilot) of the upstream Type PRX-120 pilot

to the intermediate pressure between the rst and second 

Type EZR regulators as shown in Figure 5.

The “L” port of the upstream 

Type

PRX-125 pilot is

plugged. Connect the “B” port of upstream 

Type

PRX-125 pilot to the intermediate pressure

between the rst and second 

Type

EZR regulators.

Connect the “A” port of upstream 

Type

PRX-125 pilot

downstream of both regulators.

The pilot supply pressure connection for the

downstream Type EZR regulator must be directly

upstream of the Type EZR using intermediate pressure

and connected to the “S” port of the downstream 

Type PRX-120. Install a Type 252 pilot supply lter 

upstream of the pilot, if needed, to keep the supply 

source from clogging the restrictor in the pilot. Inspect

and clean this lter regularly to make sure it has not 

been plugged. Connect the loading port (Port L) of the 

downstream Type PRX-120 pilot to the bonnet of the

downstream Type EZR regulator. Connect the “A” and 

“B” ports of the downstream Type PRX-120 pilot to 

downstream pressure.

Signicant restrictions in control lines can prevent 

proper pressure registration. Connect the control line 

a minimum of 8 to 10 pipe diameters downstream of

the regulator in a straight run of pipe. Do not make the 

control line connection in a turbulent area, such as in

or directly downstream of a swage or elbow. When

used, a hand valve should be a full ow valve such as 

full port ball valve.

Table 4 shows the minimum differential pressure

requirements across an individual regulator. Because

this application uses a rst-stage and second-stage 

pressure reduction, add the minimum differential

pressure for each regulator together to establish the

required pressure drop across the station. Do not

exceed maximum pilot ratings given in Table 3.

Startup and Adjustment

Note

Table 10 shows the maximum inlet

and differential pressures for specic

constructions. Use pressure gauges to

monitor inlet pressure, outlet pressure

and any intermediate pressure

during startup.

CAUTION

To prevent damage to the Type PRX pilot

during startup, the sense and bleed lines

Figure 5. Type EZR-PRX-PRX Working Monitor Schematic

INLET

FILTER

TYPE PRX/120

WORKING

PILOT

TYPE PRX/125

MONITOR PILOT

(NO RESTRICTOR SCREW)

SS

LL

B

B

A

FILTER

S

L

A

B

INTERMEDIATE

OUTLET

TYPE PRX/120

PILOT

(PLUGGED)

A

INLET PRESSURE

OUTLET PRESSURE

ATMOSPHERIC PRESSURE

LOADING PRESSURE

INTERMEDIATE PRESSURE

TYPE PRX:

S- SUPPLY PORT

B- BLEED PORT

L- LOADING PORT

A - SENSING PORT

M1001

Type EZR

11

of the Type PRX should be located on the

same side of the downstream block valve.

Keep sense and bleed lines separate.

Startup for Both Single-Regulator and

Monitoring Installations

  1. Make sure all block and vent valves are closed.

  2. Back out the pilot adjusting screw(s).

  3.  For easy initial startup, set the restrictor to the “8” 

position. For future startups, the restrictor can be

left in the desired run position.

4. SLOWLY OPEN the valves in the following order:

a. Pilot supply and control line valve(s), if used

        b. Inlet block valve

        c. Outlet block valve

5. For a 161 Series pilot with Type 112 restrictor,

turn the restrictor(s) to position “2” or to the 

desired run position. For a PRX Series pilot, turn

the restrictor screw 1 turn counterclockwise from 

fully seated (turn restrictor fully clockwise then 

1 turn counterclockwise) and the damper screw 

fully counterclockwise.

6. For a single regulator, set the pilot to the desired

outlet (control) pressure according to the pilot

adjustment procedure.

For a wide-open downstream monitor

installation, adjust the upstream working pilot until 

intermediate pressure is higher than the desired

setpoint of the monitor pilot. Adjust the downstream

monitoring pilot to the desired monitoring takeover 

pressure. Reduce the upstream pilot to the normal

outlet pressure setting.

For a wide-open upstream monitor installation,

adjust the downstream working pilot to a setpoint 

higher than the setpoint of the monitor pilot.

Adjust the upstream monitoring pilot to the desired

monitor takeover pressure. Reduce the downstream 

pilot setting to normal outlet pressure setting.

For a working monitor installation, adjust the

setpoint of the upstream monitor pilot to the desired

maximum pressure. Adjust the upstream working 

pilot to the desired intermediate pressure setting.

Adjust the downstream pilot to a pressure setting

slightly above the upstream monitor pilot pressure

setting. Adjust the upstream monitor pilot to its desired

setpoint. The setpoint of the monitor pilot should be

adjusted at least to the guidelines shown in Table 9.

The maximum may be greater. Then, establish

nal desired downstream pressure by adjusting the 

downstream working regulator pilot.

Pilot Adjustment

For 161 Series pilots, remove the pilot closing cap

(key 16, Figure 19 or key 22, Figure 20) and, on 

161EB Series only, loosen the locknut (key 12, 

Figure 19). Turn the adjusting screw (key 11, 

Figure 19 or key 35, Figure 20) into the spring case 

(key 2, Figure 19 or key 3, Figure 20) to increase the 

downstream pressure. Turn the adjusting screw out of

the spring case to decrease the downstream pressure.

For PRX Series pilots (Figure 27), loosen locknut 

(key 2) and turn the adjusting screw into the spring case 

to increase (or out of the spring case to decrease) the

downstream pressure. When the required downstream

pressure is maintained for several minutes, tighten the

locknut to lock the adjusting screw in position 

and replace the pilot closing cap.

The Restrictor and Damper screws on the PRX Series

pilot control the regulator’s proportional band (droop)

and speed of response. Table 7 includes the appropriate

settings for low ow operation. For additional tuning 

follow the steps outlined below:

1. Start with the restrictor screw 1 turn

counterclockwise from fully seated (turn restrictor 

fully clockwise then 1 turn counterclockwise) and the 

damper screw fully counterclockwise.

  2.  Turn damper screw clockwise until desired 

performance is achieved. This reduces the ow path 

of the damper. If the damper becomes fully seated

(no longer able to turn clockwise) and the desired 

performance has not been achieved, return the

damper screw to the fully counterclockwise position.

!

WARNING

The damper screw should not be left in

the fully seated position, as it will lock

the regulator in last position which could

cause incorrect pressure regulation.

Figure 6. Restrictor Adjustment

W4559_1

Type EZR

12

3. Turn the restrictor screw an additional turn

counterclockwise from fully seated. This increases 

the ow path of the restrictor. If additional tuning 

is required, repeat step 2. Follow this method until

desired performance is achieved.

Type 112 Restrictor Adjustment

The Type 112 restrictor controls the regulator’s

proportional band (droop) and speed of response. The

restrictor can be used to ne tune the regulator for 

maximum performance by decreasing the restrictor

setting for tighter control (increased opening speed,

decreased closing speed); or increasing the restrictor

setting for maximum stability (decreased opening speed,

increased closing speed). A lower setting also provides

a narrower proportional band for better accuracy. The

“8” position has the largest ow, is most stable and 

easiest for startup, however, using the “8” position 

is not necessary. The “0” setting has the smallest 

(minimum) ow passage; at no point of rotation will the 

Type 112 restrictor be completely shut off. After initial

adjustment, the restrictor does not need to be adjusted

for maintenance or startup.

PILOT TYPE

RECOMMENDED TYPE 112

RESTRICTOR SETTINGS FOR LOW

FLOW OPERATION

RECOMMENDED ORIFICE SIZE(S)

FOR LOW FLOW OPERATION

TYPE 112 RESTRICTOR SETTINGS

AND ORIFICE SIZES TO AVOID AT

LOW FLOW

161AY Series Pilots Restrictor Setting of “5” or greater 3/32 or 1/8-inch / 2.38 or 3.18 mm

(3/32-inch / 2.38 mm is standard)

Avoid restrictor setting of “2” or less if 

continuous ows are expected to be 

less than 5% of maximum capacity

Note: Higher Type 112 restrictor settings will increase proportional band. Adjustment of the Type 112 restrictor will also cause a shift in setpoint. Setpoint should be checked and adjusted 

following restrictor setting adjustment.

Table 6. Type 161AY/161AYM Pilot Adjustment Recommendations

Table 7. Type PRX Pilot Adjustment Recommendations

PILOT TYPE RECOMMENDED TYPE PRX RESTRICTOR AND DAMPER

SCREW SETTINGS FOR LOW FLOW OPERATION

TYPE PRX RESTRICTOR AND DAMPER SCREW

SETTINGS TO AVOID AT LOW FLOW

PRX/120 and PRX/120-AP Series

Restrictor Screw

- 1 turn out (counterclockwise) from fully seated for most 

low ows

- 2-1/2 turns out (for ows less than 

5% of maximum)

Damper Screw

- Fully out (counterclockwise) from seated for most 

low ows

- One turn out (for ows less than 5% of maximum) 

Restrictor Screw

- Fully seated (clockwise) or full out 

(counterclockwise)

Damper Screw

- Full in (clockwise)

Note: Counterclockwise adjustment of the Type PRX restrictor screw will increase proportional band. Adjustment of the restrictor screw will also cause a shift in setpoint. Setpoint should 

be checked and adjusted following restrictor screw adjustment.

Table 5. 161 and 161EB Series Pilot Adjustment Recommendations

PILOT TYPE RECOMMENDED TYPE 112 RESTRICTOR

SETTINGS FOR LOW FLOW OPERATION

TYPE 112 RESTRICTOR SETTINGS TO AVOID

AT LOW FLOW

161/161H Series Pilots Restrictor Setting of “5” or greater

Avoid restrictor setting of “2” or less if continuous 

ows are expected to be less than 5% 

of maximum capacity

161EB Series Pilots Restrictor Setting of “5” or greater

Avoid restrictor setting of “2” or less if continuous 

ows are expected to be less than 5% 

of maximum capacity

Note: Higher Type 112 restrictor settings will increase proportional band. Adjustment of the Type 112 restrictor will also cause a shift in setpoint. Setpoint should be checked and adjusted 

following restrictor setting adjustment.

Pilot Adjustment –

(For Low Flow Applications Only)

For stable, low ow operation, other considerations 

besides pilot settings should also be addressed.

Installation of an oversized regulator may make low ow 

operation difcult. When possible, a smaller-sized  

Type EZR should be installed. During design of a

regulator installation, the downstream piping volume

should be maximized. Control lines should not be located 

in or near piping sections that may experience turbulent

ow, such as elbows or swages. Larger diameter control 

lines are also recommended in low ow conditions. The 

larger control lines are less restrictive and will reduce pilot

exhaust bleed backpressure to the pilot that may cause 

instability. Separate sense and exhaust lines may also

help at low ow conditions. This feature is provided on the 

PRX Series, Types 161M, 161HM, 161EBM and 161AYM

pilots. Control line taps should be located in straight pipe; 

several pipeline diameters (8 to 10 of largest piping on

outlet) downstream of the regulator. These guidelines are

not mandatory but have been used to improve station

stability at low ow in some systems.

Type EZR

13

17E68

NITRILE (NBR)

17E97(1)

NITRILE (NBR)

17E88

FLUOROCARBON (FKM)

Gas Temperature

(for lower temperatures

  contact your local Sales Ofce)

-20 to 150°F / -29 to 66°C 0 to 150°F / -18 to 66°C 0 to 260°F / -18 to 127°C(2)

General Applications Best for cold temperatures.

Best for high pressure conditions, i.e.

transmission service or high pressure

industrial service. It is also the best for

abrasive or erosive service applications.

Best for natural gas having aromatic

hydrocarbons. It is also the best for high

temperature applications.

Heavy Particle Erosion Fair Excellent Good

Natural Gas With:

 Up to 3% aromatic     

hydrocarbon content(3) Good Excellent

Excellent

3 to 15% aromatic

hydrocarbon content(3) Poor Good

15 to 50% aromatic

hydrocarbon content(3) Not recommended Poor

 Up to 3% H2S (hydrogen

 sulde or sour gas) Good Good Good

 Up to 3% ketone Fair Fair Fair

 Up to 10% alcohol Good Good

 Up to 3% synthetic lube Fair Fair Good

1. The NPS 6 / DN 150, 17E97 diaphragm will perform in gas temperatures as low as -20°F / -29°C.

  2. For differential pressures above 400 psig / 27.6 bar diaphragm temperature is limited to 150°F / 66°C.

3. The aromatic hydrocarbon content is based on percent volume.

Table 8. Diaphragm Material Selection Information

MONITORING PILOT MINIMUM PRESSURE OVER NORMAL DISTRIBUTION

PRESSURE AT WHICH MONITOR PILOT CAN BE SET

WITH A RESTRICTOR SETTING OF 2

Construction Outlet (Control) Pressure Range Spring Part Number

Type 161AY or

161AYM

6 to 15 inches w.c.

0.5 to 1.2 psig

1.2 to 2.5 psig

2.5 to 4.5 psig

4.5 to 7 psig

15 to 37 mbar

34 to 83 mbar

83 mbar to 0.17 bar

0.17 to 0.31 bar

0.31 to 0.48 bar

1B653927022

1B537027052

1B537127022

1B537227022

1B537327052

1-inch w.c.

1-inch w.c.

0.5 psig

0.5 psig

0.5 psig

2 mbar(1)

2 mbar(1)

34 mbar(1)

34 mbar(1)

34 mbar(1)

Type 161EBM

5 to 15 psig

10 to 40 psig

30 to 75 psig

70 to 140 psig

130 to 200 psig

200 to 350 psig

0.34 to 1.0 bar

0.69 to 2.8 bar

2.1 to 5.2 bar

4.8 to 9.7 bar

9.0 to 13.8 bar

13.8 to 24.1 bar

17B1260X012

17B1262X012

17B1259X012

17B1261X012

17B1263X012

17B1264X012

0.5 psig

0.5 psig

0.6 psig

1.3 psig

1.5 psig

3 psig

34 mbar(1)

34 mbar(1)

41 mbar(1)

90 mbar(1)

0.10 bar(1)

0.21 bar(1)

Type 161EB 30 to 300 psig 2.1 to 20.7 bar 15A9258X012 - - - -

1. Monitor pilot minimum setpoint was determined with a pressure drop ranging from 50 to 150 psig / 3.5 to 10.3 bar. Approximately double the minimum monitor pilot setpoint.

Table 9. Type EZR Working Monitor Performance

Shutdown for Both Single-Regulator and

Monitoring Installations

!

WARNING

If pilot supply pressure is shut down

rst, the downstream system may be

subjected to full inlet pressure.

1. If the pilot setting must be disturbed, be sure to

keep some tension on the spring. This will prevent 

trapping inlet pressure during blow down.

  2.  Close the valves shown in Figure 3 or 4, in the 

following order:

        a. Inlet block valve

        b. Outlet block valve

        c. Control line valve(s), if used

3. Open the vent valves to depressurize the system.

Maintenance

Regulator parts are subject to normal wear and must

be inspected periodically and replaced as necessary.

Due to the care Regulator Technologies takes in 

meeting all manufacturing requirements (heat treating,

dimensional tolerances, etc.), use only replacement

parts manufactured or furnished by Regulator

Technologies. Also, when lubrication is required,

use a good quality lubricant and sparingly coat the

recommended part. The frequency of inspection

and parts replacement depends upon the severity of

service conditions, applicable codes and government

regulations and company inspection procedures.

Table 12 lists various regulator problems and possible

solutions for them.

Type EZR

14

Table 10. Main Valve Maximum Pressure Ratings, Diaphragm Selection Information and Main Spring Selection(1)

BODY SIZE

NPS / DN

DIAPHRAGM

MATERIAL

MAXIMUM

OPERATING INLET

PRESSURE(4)

MAXIMUM

OPERATING

DIFFERENTIAL

PRESSURE(4)

MAXIMUM

EMERGENCY INLET

AND DIFFERENTIAL

PRESSURE

MAIN SPRING

COLOR CODE

DIAPHRAGM

DESIGNATION

psig bar psid bar d psid bar d

1 and 1-1/4 x 1 /

25 and 32 x 25

17E68 Nitrile (NBR)

Low temperature

100 6.9 100 6.9 100 6.9 Light Blue

130

460 31.7 400 27.6 460 31.7 Black

17E97 Nitrile (NBR)

High pressure and/or erosion

resistance

500 34.5 500 34.5 1050 72.4 Black

1050 72.4 800 55.2 1050 72.4 Black with White 

Stripe(2)

17E88 Fluorocarbon (FKM)

High aromatic hydrocarbon

content resistance

100 6.9 100 6.9 100 6.9 Light Blue

500 34.5 500 34.5(3) 750 51.7 Black

750 51.7 500 34.5(3) 750 51.7 Black with White 

Stripe(2)

2 x 1 / 50 x 25

17E68 Nitrile (NBR)

Low temperature

100 6.9 100 6.9 100 6.9 Light Blue

360 24.8 300 20.7 360 24.8 Black with White 

Stripe

17E97 Nitrile (NBR)

High pressure and/or erosion

resistance

500 34.5 500 34.5 500 34.5 Black with White 

Stripe

1050 72.4 800 55.2 1050 72.4 Red Stripe(2)

17E88 Fluorocarbon (FKM)

High aromatic hydrocarbon

content resistance

100 6.9 100 6.9 100 6.9 Light Blue

750 51.7 500 34.5(3) 750 51.7 Black with White 

Stripe

2 / 50

17E68 Nitrile (NBR)

Low temperature

100 6.9 100 6.9 100 6.9 Yellow

460 31.7 400 27.6 460 31.7 Green

17E97 Nitrile (NBR)

High pressure and/or erosion

resistance

500 34.5 500 34.5 1050 72.4 Green

1050 72.4 800 55.2 1050 72.4 Red(2) or Purple(2)

17E88 Fluorocarbon (FKM)

High aromatic hydrocarbon

content resistance

100 6.9 100 6.9 100 6.9 Yellow

500 34.5 500 34.5(3) 750 51.7 Green

750 51.7 500 34.5(3) 750 51.7 Red(2) or Purple(2)

3 / 80

17E68 Nitrile (NBR)

Low temperature

100 6.9 100 6.9 100 6.9 Yellow

360 24.8 300 20.7 500 34.5 Light Blue

17E97 Nitrile (NBR)

High pressure and/or

erosion resistance

500 34.5 500 34.5 1050 72.4 Light Blue

1050 72.4 800 55.2 1050 72.4 Black(2)

17E88 Fluorocarbon (FKM)

High aromatic hydrocarbon

content resistance

100 6.9 100 6.9 100 6.9 Yellow

500 34.5 500 34.5(3) 750 51.7 Light Blue

750 51.7 500 34.5(3) 750 51.7 Black(2)

4, 6 x 4

and 8 x 4 /

100, 150 x 100

and 200 x 100

17E68 Nitrile (NBR)

Low temperature

100 6.9 100 6.9 100 6.9 Yellow

360 24.8 300 20.7 500 34.5 Green

17E97 Nitrile (NBR)

High pressure and/or

erosion resistance

100 6.9 100 6.9 100 6.9 Yellow

500 34.5 500 34.5 1050 72.4 Green

1050 72.4 800 55.2 1050 72.4 Red(2)

17E88 Fluorocarbon (FKM)

High aromatic hydrocarbon

content resistance

100 6.9 100 6.9 100 6.9 Yellow

500 34.5 500 34.5(3) 750 51.7 Green

750 51.7 500 34.5(3) 750 51.7 Red(2)

6, 8 x 6

and 12 x 6 /

150, 200 x 150

and 300 x 150

17E97 Nitrile (NBR)

High pressure and/or

erosion resistance

100 6.9 100 6.9 100 6.9 Yellow

500 34.5 500 34.5 1050 72.4 Green

1050 72.4 800 55.2 1050 72.4 Red(2)

17E88 Fluorocarbon (FKM)

High aromatic hydrocarbon

content resistance

100 6.9 100 6.9 100 6.9 Yellow

500 34.5 500 34.5(3) 750 51.7 Green

750 51.7 500 34.5(3) 750 51.7 Red(2)

8 / 200

17E97 Nitrile (NBR)

High pressure and/or

erosion resistance

100 6.9 100 6.9 100 6.9 Yellow

500 34.5 500 34.5 1050 72.4 Green

1050 72.4 800 55.2 1050 72.4 Red(2)

1. See Table 1 for main valve structural design ratings and Table 3 for pilot ratings.

  2. The red, black, purple, red stripe and black with white stripe springs are only recommended for applications where the maximum inlet pressure can exceed 500 psig / 34.5 bar.

  3. For differential pressures above 400 psid / 27.6 bar d diaphragm temperatures are limited to 150°F / 66°C.

  4.  These are recommendations that provide the best regulator performance for a typical application. Please contact your local Sales Ofce for further information if a deviation from the 

standard recommendations is required.

Type EZR

15

TYPE 161AY TYPE 161AYM

CONTROL LINE CONNECTION:

1/2 NPT PRESSURE

REGISTRATION ONLY. USE

3/8 NPT O.D. TUBING OR LARGER

FOR CONTROL LINE.

PILOT BLEED (EXHAUST)

CONNECTION: 3/4 NPT. USE

1/2 NPT PIPE MINIMUM FOR BLEED

(EXHAUST) LINE.

CONTROL LINE CONNECTION:

3/4 NPT PRESSURE

REGISTRATION AND PILOT

BLEED (EXHAUST). USE

3/4 NPT PIPE MINIMUM FOR

CONTROL LINE.

INLET 3/4 NPT

CONNECTS

TO 1/4 NPT

TYPE 112 OUTLET

INLET 3/4 NPT CONNECTS

TO 1/4 NPT TYPE 112 OUTLET

B2609

TYPE 112

PILOT SUPPLY CONNECTION: 1/4 NPT PIPE

CONNECTS TO UPSTREAM PILOT SUPPLY TAP

LOADING CONNECTION: 1/4 NPT PIPE CONNECTS TO

TYPE EZR DIAPHRAGM LOADING PORT

OUTLET CONNECTION: 1/4 NPT PIPE

CONNECTS TO PILOT INLET CONNECTION

OPTIONAL LOADING CONNECTION:

1/4 NPT NORMALLY PLUGGED

11B5004-A

Figure 7. Pilot Port Function and Connection Sizes

TYPE 161EB TYPE 161EBM

IN

OUT

IN

OUT

SENSE

1/4 NPT

NORMALLY PLUGGED

INLET 1/4 NPT

CONNECTS

TO 1/4 NPT

TYPE 112 OUTLET

CONTROL LINE CONNECTION:

1/4 NPT PRESSURE

REGISTRATION AND PILOT BLEED

(EXHAUST). USE 3/8 NPT

O.D. TUBING LARGER FOR

CONTROL LINE.

INLET 1/4 NPT

CONNECTS

TO 1/4 NPT

TYPE 112 OUTLET

CONTROL LINE CONNECTION:

1/4 NPT PRESSURE

REGISTRATION ONLY. USE

3/8 NPT O.D. TUBING OR LARGER

FOR CONTROL LINE.

PILOT BLEED (EXHAUST)

CONNECTION: 1/4 NPT. USE 3/8 NPT

O.D. TUBING OR LARGER FOR BLEED

(EXHAUST) LINE.

21B5005-A

Type EZR

16

Type EZR Main Valve Trim Parts

Instructions are given for complete disassembly and

assembly. The main valve may remain in the pipeline

during maintenance procedures. Key numbers are

referenced in Figures 14 through 18.

CAUTION

Avoid personal injury or damage to

property from sudden release of pressure

or uncontrolled gas or other process

uid. Before starting to disassemble,

carefully release all pressures according

to the Shutdown procedure. Use gauges

to monitor inlet and outlet pressures

while releasing these pressures.

Converting a Fisher® E-Body to Type EZR

Remove all trim parts from the main valve and clean

the body interior. Then follow procedure in Assembly

section to convert a Fisher® E-body to a Type EZR.

CAUTION

When installing a Type EZR trim package

make sure ow is up through the center

of the cage and down through the cage

slots. In some cases, correct ow path

is achieved by removing the body from

the line and turning it around. If this is

done, change the ow arrow to indicate

the correct direction. Damage may result

if ow is not in the correct direction. After

assembly, check the regulator for shutoff

and leakage to atmosphere.

Disassembly

Disassembly of Type EZR

1. Shutdown, isolate and depressurize the main valve

and pilot.

  2.  Remove the cap screws (key 3). Lift up and 

remove the bonnet (key 2) from the body (key 1).

Note

For the NPS 8 / DN 200 body, the

lifting ange (key 143) is capable

of supporting the full weight of the

regulator assembly and can be utilized

to lift bonnet if required.

  3.  Remove the diaphragm and plug assembly (key 9) 

and bonnet O-ring (key 28). For NPS 2 x 1 / 

DN 50 x 25 sizes, use a screwdriver to remove the

upper adaptor (key 131).

  4.  Pull out the cage (key 7), O-ring (key 8), and 

inlet strainer or strainer shim (key 23) (if no 

strainer). For NPS 2 x 1 / DN 50 x 25 sizes,

remove the lower adaptor (key 132).

  5.  Clean parts and replace if necessary. To change the 

O-ring (key 121) on a 6-inch / 152 mm cage with 

attached restrictor plate (key 71), remove cap screws 

(key 126).

Assembly

  1.  Install  the  inlet  strainer  or  shim  (key  23)  into  the 

body (key 1). 

STYLE MATERIAL DIAPHRAGM MATERIALS

Imprint Ink Mark Imprint Ink Mark

2 130

2 17E68 17E68 - Nitrile (NBR)

(low temperature)

4 17E88

17E88 - Fluorocarbon (FKM)

(high aromatic hydrocarbon

content resistance)

5 17E97

17E97 - Nitrile (NBR)

(high pressure and/or

erosion resistance)

Table 11. Diaphragm Imprint Codes

1

1

1

1

1

1

11

Figure 8. Diaphragm Markings

LOCATE INK CODE

BETWEEN RADII

MATERIAL

INK CODE

MANUFACTURER

CODE

THICKNESS INK

CODE (USE ONE

LOCATION ONLY)

DOME IDENTIFICATION

ELASTOMER/FABRIC

MATERIAL CODE

THICKNESS

CODE

YEAR OF MANUFACTURE

RADIAL LOCATION

TO LOCATE

IMPRINT CODE

Type EZR

17

Note

When installing in a vertical orientation,

apply lubricant to the bottom of the inlet

strainer or strainer shim (key 23) to help

hold parts in place while installing cage.

  2. Lightly lubricate and install the cage O-ring (key 8).

3. Apply lubricant lightly to all O-rings or the mating

part before installing them.

  4.  Install the cage (key 7) and lightly lubricate and 

install the bonnet O-ring (key 28). 

To assemble a 6-inch / 152 mm cage with attached

restrictor plate (key 71), lightly lubricate the O-ring 

(key 121) and place it on the restrictor plate. 

Secure the cage to the restrictor plate with the

cap screws (key 126), using a torque of 10 to 

12 foot-pounds / 14 to 16 N•m. 

For NPS 2 x 1 / DN 50 x 25 sizes, the lower

adaptor (key 132) must be assembled on the 

cage before placing in the body. Lightly lubricate 

the lower adaptor O-rings (keys 121 and 67) and 

place the lower adaptor on a at surface. Then 

press the cage down into the lower adaptor.

5.  Lubricate the top and bottom of the outer edge 

(bead area) of the diaphragm and place diaphragm

and plug assembly (key 9) on the cage (key 7). For 

NPS 2 x 1 / DN 50 x 25 sizes, the upper adaptor

(key 131) must be placed on the cage before the 

bonnet (key 2). Lightly lubricate the upper adaptor 

O-ring (key 133) and then press the upper adaptor 

onto the cage.

6. If travel indicator was removed, lightly lubricate the

travel indicator assembly threads and screw it into

the bonnet (key 2). See Travel Indicator Assembly 

Maintenance for maintenance.

  7. Install the bonnet (key 2) in proper orientation.

CAUTION

Make sure to use a Type EZR

bonnet. The Type EZR bonnet is NOT

interchangeable with other Fisher®

E-body bonnets. Installing an improper

bonnet can result in stem assembly

breakage and unit failure. The bonnet

can be identied by the Type EZR

markings on the top.

PROBLEM POSSIBLE SOLUTION

Outlet pressure suddenly rises above

setpoint and approaches inlet pressure

 •  If travel indicator is in UP position, check restrictor and pilot supply lter for plugging

 •  If travel indicator is in DOWN position, check main valve for debris or diaphragm damage

 Outlet pressure normal at low ow but 

 falls below setpoint at high ow

 •  Check main valve inlet strainer for plugging

 •  Check inlet pressure at high ow condition

 •  Check sizing calculations to be sure main valve body is large enough for load

 •  Check for undersized or restricted control line (use the minimum size given in step 6 of All Installations of the 

Type EZR Installation section).

 •  Adjust restrictor to a lower setting

Outlet pressure cycles

 •  Adjust restrictor to a higher setting

 •  Check control line placement. Make sure it is not located in a turbulent area.

 •  Make sure there is not a restriction in the control line, such as a needle valve.

Gas escapes from pilot spring case  •  Replace pilot diaphragm assembly

Gas escapes from travel indicator  •  Replace indicator stem O-ring, if indicator is not desired, convert to a non-travel indicator assembly

Regulator unexpectedly closes or falls

below setpoint

 •  Check pilot for ice. Moisture in the gas can cause ice to form and build up in the pilot, blocking the ow.

    This most commonly occurs when ambient temperature is 30 to 40°F / -1 to 4°C. Heating the regulator or

adding a de-icing agent will reduce the possibility of icing.

Outlet pressure approaches inlet

 pressure when no ow is desired

 •  Check main valve O-rings for damage or improper installation

 •  Check cage and diaphragm surfaces for erosion or trapped debris

 •  Check pilot valve plug and seat for seating surface damage or debris

 •  Check pilot for ice

Regulator will not open

 •  Check for clogged control line

 •  Make sure control line is installed and open

 •  Check for damage to the main valve diaphragm

 •  On new installations, make sure the control line and pilot supply are properly connected

Regulator will not close

 •  Make sure the pilot supply is properly connected

 •  Check restrictor for clogging

 •  Check the main valve diaphragm for damage

 •  Check for a broken control line

 High lock-up pressure with slow shutdown  •  Check for debris on main valve or pilot seat

 High lock-up pressure with fast shutdown  •  Adjust restrictor to a higher setting

Note: If you were unable to solve your problem using this troubleshooting guide, contact your local Sales Ofce.

Table 12. Troubleshooting Guide

Type EZR

18

  8.  Lubricate cap screws (key 3) and secure the 

bonnet (key 2), using an even crisscross pattern. It 

may be necessary to push down on bonnet to start

cap screws. Tighten cap screws to proper torque

(see Table 13).

Diaphragm and Plug

Assembly Maintenance

The diaphragm and plug assembly can be

replaced as a single unit (a diaphragm cartridge) or

individual components within the assembly can be

replaced. When replacing individual components,

inspect each component for damage and wear

and replace parts as needed. Key numbers for the

following assembly and disassembly procedure are

referenced in Figures 9 and 14.

1. Place a screwdriver or similar tool through the hole

in the top plug (key 5).

  2.  Remove the  anged locknut (key 13) from 

the bottom plug (key 11). This loosens the 

entire assembly.

Note

On NPS 1, 1-1/4 x 1 and 2 x 1 / DN 25,

32 x 25 and 50 x 25 bodies, remove the

socket head screw (key 129) and lock

washer (key 130) from the bottom plug.

  3.  Remove the bottom plug (key 11) and the bottom 

plug O-ring (key 10).

  4. Remove the diaphragm (key 9).

  5. Remove the top plug O-rings (keys 14 and 70).

  6. Check all components for damage or wear and  

replace as necessary.

7. When reassembling, be sure to lubricate all O-rings

before installing.

  8.  Hold the top plug (key 5). Place the parts on the 

top plug in the following order:

    •  O-ring (key 14)

    •  O-ring (key 70)

    •  Diaphragm (key 9)

    •  O-ring (key10)

    •  Bottom Plug (key 11)

    •  Flanged Locknut (key 13)

  9.  Reassemble in the reverse order. Tighten  ange 

locknut (key 13) to proper torque (see Table 13).

Travel Indicator Assembly Maintenance

Travel indicator assembly key numbers are referenced 

in Figures 10, 14 and 18. The indicator assembly

can be removed and installed without removing the

bonnet (key 2) from the body (key 1). Travel indicator 

maintenance is performed for two reasons:

a. When damaged or worn parts need replacing.

b. When travel indicator is removed and replaced

with a travel indicator plug assembly.

!

WARNING

Avoid personal injury or damage

to property from sudden release

of pressure or uncontrolled gas or

other process  uid. Before starting

to disassemble, carefully release all

pressures according to the shutdown

procedure. Use gauges to monitor inlet,

loading and outlet pressures while

releasing these pressures.

  1.  Remove the indicator protector (key 22, Figure 14) 

and indicator cover (key 21).

  2.  Remove the  rst hex nut (key 4) and the indicator 

washer (key 20). 

  3.  Unscrew the second hex nut (key 4) on the top of 

the indicator stem (key 15). Do not remove.

  4. Use a wrench to remove indicator  tting (key 19).

Figure 9. Diaphragm and Plug Assembly Components

FLANGED

LOCKNUT

(KEY 13)

BOTTOM PLUG

(KEY 11)

DIAPHRAGM

(KEY 9)

O-RING

(KEY 14)

TOP PLUG

(KEY 5)

O-RING

(KEY 70)

O-RING

(KEY 10)

W7394

Type EZR

19

  5.  Lift out travel indicator assembly. If replacing travel 

indicator with travel indicator plug, skip to step 9.

  6.  Compress the main spring (key 12). Remove the 

second hex nut (key 4). Parts will separate easily 

when the hex nut is removed.

  7.  Slide the indicator stem (key 15) out of the 

indicator  tting (key 19). The main spring (key 12) 

and upper spring seat (key 17) will be free.

  8.  If necessary, use the indicator stem (key 15) to pry 

the back-up rings (key 16) and O-ring (key 18) out 

of the indicator  tting (key 19).

  9.  Check the indicator  tting O-ring (key 6). Lubricate 

and replace if necessary.

10. To replace travel indicator parts, lubricate

all O-rings, back-up rings and threads. To 

reassemble, hold the indicator stem (key 15) and 

place the parts on the stem in the following order

(see Figure 10).

    •  Washer (key 79 for NPS 6 / DN 150 size only)

    •  Main Spring (key 12), small end  rst

    •   Upper Spring Seat (key 17), make sure to place 

the large end toward the spring

    •  First Back-up Ring (key 16)

    •  O-ring (key 18)

    •  Second Back-up Ring (key 16)

    •   Indicator Fitting (key 19), the back-up rings 

(key 16) and O-ring (key 18) should slide into 

the indicator  tting and the small end of the 

upper spring seat (key 17) should slide into the 

indicator  tting.

    •  First Hex Nut (key 4)

    •  Indicator Washer (key 20)

    •  Second Hex Nut (key 4)

11.  Install the indicator  tting (key 19) into the bonnet 

(key 2, Figure 14), tighten to the proper torque 

(see Table 13).

To set the travel indicator, hold the indicator cover

(key 21) next to the indicator  tting (key 19). 

Screw the hex nuts (key 4) and the indicator 

washer (key 20) down on the indicator stem 

(key 15) until the washer is even with the lowest 

marking on the indicator cover. Lightly lubricate 

the indicator cover threads and install. Replace

the indicator protector (key 22).

To replace the travel indicator with the non-travel

indicator option, place the main spring (key 12) into 

the bonnet. Install the indicator plug (key 19) and 

tighten to proper torque (see Table 13).

BODY SIZE, NPS / DN TORQUE, FOOT-POUNDS / N•m

Cap Screws Flange Locknut Indicator Fitting Indicator Plug

1 or 1-1/4 x 1 / 25 or 32 x 25 75 to 95 / 102 to 129 4 to 6 / 5.4 to 8.1 90 to 160 / 122 to 217 90 to 160 / 122 to 217

2 x 1 or 2 / 50 x 25 or 50 55 to 70 / 75 to 95 6 to 8 / 8.1 to 11 90 to 160 / 122 to 217 90 to 160 / 122 to 217

3 / 80 100 to 130 / 136 to 176 19 to 25 / 26 to 34 200 to 300 / 271 to 407 200 to 300 / 271 to 407

4, 6 x 4 or 8 x 4 /

100, 150 x 100 or 200 x 100 160 to 210 / 217 to 285 19 to 25 / 26 to 34 200 to 300 / 271 to 407 200 to 300 / 271 to 407

6, 8 x 6 or 12 x 6 /

150, 200 x 150 or 300 x 150 275 to 300 / 373 to 407 50 to 100 / 68 to 136 300 to 425 / 407 to 577 300 to 425 / 407 to 577

8 / 200 400 to 450 / 542 to 610 90 to 110 / 122 to 149 300 to 425 / 407 to 577 300 to 425 / 407 to 577

Table 13. Torque Values

Figure 10. Travel Indicator Parts

INDICATOR COVER

(KEY 21)

HEX NUTS

(KEY 4)

INDICATOR FITTING

(KEY 19)

O-RING

(KEY 18)

UPPER SPRING

SEAT (KEY 17)

MAIN SPRING

(KEY 12)

INDICATOR STEM

(KEY 15)

WASHER (KEY 79)

(NPS 6 / DN 150 SIZE ONLY)

BACK-UP

RINGS

(KEY 16)

INDICATOR

O-RING (KEY 6)

INDICATOR

WASHER (KEY 20)

W7400_1

Type EZR

20

161EB Series Pilots (Figure 19)

Note

This procedure covers all 161EB Series

pilots. Types 161EB and 161EBM rated

for outlet pressure settings over

200 psig / 13.8 bar require a diaphragm

limiter. Types 161EB and 161EBM pilots

rated for outlet pressure settings under

200 psig / 13.8 bar do not require a

diaphragm limiter.

Trim Parts

1. As shown in Figure 11, remove the body plug

(key 3) to let the plug spring (key 6) and valve plug 

(key 4) drop freely from the body.

2. Inspect the removed parts and body plug O-ring

(key 15), replace as necessary and make sure the 

plug seating surfaces are free from debris.

3. Sparingly apply lubricant to the body plug O-ring

(key 15) and the threads of the body plug (key 3). 

Install the body plug O-ring over the body plug.

  4. Stack the plug spring (key 6) and valve plug 

      (key 4) on the body plug (key 3). Install the body  

      plug with stacked parts into the body (key 1).

Diaphragm Parts

  1.  Remove the closing cap (key 16), loosen the locknut 

(key 12) and back out the adjusting screw (key 11) 

until compression is removed from the control spring

(key 9).

  2.  Remove the machine screws (key 13, not shown) 

and separate the spring case (key 2) from the body 

(key 1). Remove the control spring seat (key 8), 

the control spring (key 9). If used, remove the 

diaphragm limiter (key 10). Replace if necessary.

  3.  Remove the diaphragm assembly (key 7) and 

inspect the diaphragm.

4. On Type 161EBM pilots, inspect the stem guide

seal assembly (key 19) and, if damaged, replace 

the complete assembly. Inspect the outer O-ring

(key 22) and replace if necessary.

  5.  Install the diaphragm assembly (key 7) and push 

down on it to see if the valve plug (key 4) strokes 

smoothly and approximately 1/16-inch / 1.6 mm.

  6.  Stack the control spring (key 9), control spring seat 

(key 8) and diaphragm limiter (key 10) (if used) on 

the diaphragm assembly (key 7). If used, make sure 

the diaphragm limiter is installed beveled side up on

Types 161EB and 161EBM pilots with 200 to

350 psig / 13.8 to 24.1 bar outlet pressure range.

Lightly apply lubricant to the control spring seat.

  7.  Install the spring case (key 2) on the body (key 1) 

with the vent (key 18) properly oriented. Make sure 

the vent is not directly over inlet or outlet piping due

to possible icing. Install the machine screws (key 13, 

not shown), using a crisscross pattern, torque them

to 5 to 7 foot-pounds / 6.8 to 9.5 N•m for stainless 

steel bodies and 2 to 3 foot-pounds / 2.7 to 4.1 N•m 

for aluminum bodies. Lubricate the adjusting 

screw threads.

8. When maintenance is complete, refer to the Startup

and Adjustment section to put the regulator back 

into operation and adjust the pressure setting.

Tighten the locknut (key 12), replace the closing cap 

gasket (key 17) if necessary and install the closing 

cap (key 16).

161AY Series Pilots (Figure 20)

Body Area

Use this procedure to gain access to the disk 

assembly, orice and body O-ring. All pressure must 

be released from the diaphragm casing and the disk 

assembly must be open, before these steps can

be performed.

  1.  Remove the cap screws (key 2) and separate the 

diaphragm casing (key 4) from the body (key 1). 

  2.  Remove body seal O-ring (key 11) and the back-up 

ring (key 50). Inspect the body seal O-ring and replace 

if necessary.

  3.  Inspect and replace the orice (key 5) if necessary.  

Lubricate the threads of the replacement orice 

with a good grade of light grease and install with

29 to 37 foot-pounds / 39 to 50 N•m of torque.

Figure 11. 161EB Series Pilot Trim Removal/Installation

W4570-1

Type EZR

21

  4.  Remove the cotter pin (key 15) if it is necessary to 

replace the disk assembly (key 13) or the throat 

seal O-ring (key 31) of a Type 161AYM.

5. For a Type 161AYM, inspect the throat seal O-ring

(key 31) and remove the machine screw (key 33). 

Replace O-ring if necessary.

  6.  Install the disk assembly (key 13) and secure it 

with the cotter pin (key 15).

  7.  Place back-up ring (key 50) into the body (key 1) 

then place the body seal O-ring (key 11) into the body. 

  8.  Place the diaphragm casing (key 4) on the body 

(key 1). Secure the diaphragm casing to the body 

with the cap screws (key 2).

Diaphragm and Spring Case Area

Use this procedure to change the control spring and to 

inspect, clean or replace parts in the spring case and

diaphragm assembly.

To Change the Control Spring:

  1.  Remove the closing cap (key 22) and turn the 

adjusting screw (key 35) counterclockwise until all 

compression is removed from the control spring

(key 6).  

  2.  Change the control spring (key 6) to match the 

desired spring range.

  3. Replace the adjusting screw (key 35).

  4.  Install the replacement closing cap gasket (key 25) 

if necessary and reinstall the closing cap (key 22).

5. If the spring was changed, be sure to change the

stamped spring range on the nameplate.

To Disassemble and Reassemble Diaphragm Parts

  1.  Remove the closing cap (key 22) and turn adjusting 

screw (key 35) counterclockwise to remove adjusting 

screw, baf e plate (key 56) and control spring (key 6).

  2.  Remove the spring case hex nuts (key 23, not 

shown), cap screws (key 24) and spring case (key 3).

  3.  Remove the diaphragm (key 10) and attached parts 

by tilting them so that the pusher post (key 8) slips 

off the lever assembly (key 16). To separate the 

diaphragm (key 10) from the attached parts, unscrew 

the machine screw (key 38) from the pusher post 

(key 8).

  4.  Inspect the pusher post (key 8) and the body seal 

O-ring (key 11), replace if required.

  5.  Remove hex nut (key 21) to separate the 

diaphragm (key 10) and attached parts.

  6.  To replace the lever assembly (key 16), remove 

the machine screws (key 17). To replace the 

stem (key 14) or access the stem seal O-ring 

(key 30) also perform Body Area Maintenance 

procedure steps 1 and 4 and pull the stem out of the

diaphragm casing (key 4).

  7.  Install the stem (key 14) into the guide insert (key 18) 

and perform Body Area Maintenance procedure

steps 6 through 8 as necessary.

  8.  Install the lever assembly (key 16) into the stem 

(key 14) and secure the lever assembly with the 

machine screws (key 17).

9. Install the parts on the pusher post in the order

listed below:

    •  Pusher Post (key 8)

    •  Pusher Post Connector (key 40)

    •  Connector Seal O-ring (key 49)

    •  Diaphragm Head (key 7)

    •  Diaphragm (key 10), pattern side up

    •  Diaphragm Head (key 7)

    •   Hex Nut (key 21) — Tighten the hex nut 

9 to 11 foot-pounds / 12 to 15 N•m to secure 

parts to the pusher post connector (key 40)

    •  Overpressure Spring (key 39)

    •  Spring Holder (key 37)

    •  Machine Screw (key 38)

10.  Insert and tighten the machine screw (key 38) with 

a torque of 1 to 3 foot-pounds / 1.4 to 4.1 N•m to 

secure the diaphragm parts to the pusher post

(key 8).

11. Install the assembled parts in the diaphragm

casing (key 4). Make sure the lever (key 16)  ts 

in the pusher post (key 8) and that the holes in 

the diaphragm (key 10) align with the holes in the 

diaphragm casing.

12.  Place the spring case (key 3) on the diaphragm 

casing (key 4) so the vent assembly (key 26) is 

oriented correctly and secure with the cap screws

(key 24) and hex nuts (key 23, not shown), 

 ngertight only.

Figure 12. Expanded View of the Body Area

Showing the O-ring and Back-up Ring Placement

BODY SEAL O-RING (KEY 11)

BACK-UP RING (KEY 50)

BODY (KEY 1)

Type EZR

22

13.  Insert the control spring (key 6) into the spring 

case (key 3), followed by the bafe plate (key 56) 

and adjusting screw (key 35).

14.  Turn the adjusting screw (key 35) clockwise until 

there is enough spring (key 6) force to provide proper 

slack to the diaphragm (key 10). Using a crisscross 

pattern, tighten the cap screws (key 24) and hex nuts 

(key 23, not shown) to 14 to 17 foot-pounds / 

19 to 23 N•m of torque. To adjust the outlet pressure 

to the desired setting, refer to Startup and

Adjustment section.

15.  Install a replacement closing cap gasket (key 25) if 

necessary and then install the closing cap (key 22).

PRX Series Maintenance

CAUTION

Always remove spring compression before

performing maintenance on this unit.

To remove spring compression, loosen

locknut (key 2, Figure 27) and back out

adjusting screw (key 1) until compression

is removed from the spring (key 7).

Lower Case Maintenance

1. Remove pressure from the pilot.

  2.  Remove machine screws (key 10) from lower 

cover (key 21) and the separate lower cover from 

the body (key 16).

  3.  Use a wrench to hold the stem (key 23) and loosen 

the stem nut (key 20). Remove the stem nut and 

washer (key 11).

  4.  Remove the upper diaphragm plate (key 13), 

diaphragm (key 14), pad holder (key 22) and O-ring 

(key 18). Inspect parts for damage or wear and 

replace if necessary.

  5.  Remove orice (key 19) and O-ring (key 17). 

Inspect the parts for damage or wear and replace if

necessary. Lightly lubricate the O-ring and place in 

the body (key 16). Install the orice.

Figure 13. Pushing Groove Valve Up With Retainer

W4573

  6. Set the pad holder (key 22) in the body (key 16).

  7.  Lightly lubricate the rims of the diaphragm (key 14) 

and place it on top of the pad holder (key 22). 

Set the upper diaphragm plate (key 13) on 

the diaphragm.

  8.  Lightly lubricate the O-ring (key 18) and place it in 

the lower cover (key 21).

  9.  Place the washer (key 11) and stem nut (key 20) 

on the stem (key 23) and tighten. If also performing 

Upper Case Maintenance, skip to step 2 of the 

Upper Case Maintenance section.

10.  Insert machine screws (key 10) in the lower cover 

(key 21) and tighten uniformly to ensure proper seal.

Upper Case Maintenance

1. Remove pressure from the pilot.

  2.  Loosen locknut (key 2) and back out adjusting 

screw (key 1) until compression is removed from 

the spring (key 7). Remove cap (key 3).

  3.  Lift the upper spring seat (key 6), spring (key 7) 

and O-ring (key 4) out of the upper cover (key 8). 

Inspect O-ring and replace if necessary.

  4.  Remove machine screws (key 10) from lower cover 

(key 21) and the separate lower cover from the body 

(key 16), unless removed during lower diaphragm 

maintenance. Use a wrench to hold stem (key 23) 

securely while removing the upper diahragm nut

(key 26).

5. Remove remaining loose components: washer

(key 11), upper diaphragm plate (key 13), 

diaphragm (key 14), lower diaphragm plate 

(key 15) and O-rings (keys 18 and 25). Inspect 

diaphragm and O-rings for damage or wear and

replace if necessary.

  6.  Lightly lubricate the O-ring (key 25). Place O-ring 

over the stem (key 23) and press it down into the 

body (key 16).

  7.  Set the lower diaphragm plate (key 15) into the 

body (key 16).

  8.  Lightly lubricate the rims of the diaphragm (key 14) 

and place it in the body (key 16) on top of the lower 

diaphragm plate (key 15).

  9.  Set the upper diaphragm plate (key 13) on top of 

the diaphragm (key 14).

10.  Place washer (key 11) and upper diaphragm nut 

(key 26) on the stem (key 23) and tighten using a 

wrench to hold the stem.

11. Set the upper spring seat (key 6).

Type EZR

23

Damper and Restrictor Maintenance

  1. Remove screw (key 31, Figure 27) and plate (key 29).

  2. Remove ring nuts (key 30).

  3.  Remove damper adjusting screw (key 27). 

Remove and inspect O-ring (key 28) for damage 

or wear and replace if necessary. Lightly lubricate 

O-ring before placing on the adjusting screw. Insert

damper adjusting screw into the body (key 16) and 

tighten. Insert ring nut (key 30) and tighten. Back 

out damper adjusting screw until it stops.

  4.  Remove restrictor adjusting screw with hole (key 32). 

Remove and inspect O-ring (key 28) for damage or

wear and replace if necessary. Lightly lubricate O-ring 

before placing on the adjusting screw. Insert restrictor

adjusting screw into the body (key 16) and completely 

tighten. Insert ring nut (key 30) and completely 

tighten. Back out restrictor adjusting screw 1/2 turn.

Note

When using a Type PRX/120 pilot with a

Type PRX/125 pilot as a monitor, use the

following settings:

• Restrictor - completely tighten and

then back out three full turns.

• Damper - back out until it stops.

  5. Install plate (key 29) and screw (key 31).

Type 112 Restrictor

Perform this procedure only if O-rings are leaking. 

Key numbers are referenced in Figure 22.

  1.  Unscrew the groove valve (key 22) and retainer 

(key 23) just enough to loosen them, but do not 

completely separate.

2. As shown in Figure 14, push on the retainer

(key 23) to push the groove valve (key 22) out of 

the body (key 21), then complete disassembly.

  3.  Replace the groove valve O-rings (key 24) if

necessary, being sure to lightly apply lubricant to

the replacement O-rings before installing them in

the groove valve and retainer.

  4.  Install the groove valve (key 22) into the same 

side of the body where the scale appears. Install

the retainer into the opposite side of the body and

tighten until both are secure.

5. When all maintenance is complete, refer to the

Startup and Adjustment section to

p

ut the regulator

back into operation.

Parts Ordering

When corresponding with your local Sales Ofce about 

this equipment, reference the equipment serial number

or FS number found on a nameplate attached to the

bonnet. When ordering replacement parts, reference

the key number of each needed part as found in 

the following parts list. Separate kit containing all 

recommended spare parts is available.

Parts List

Type EZR Main Valve (Figures 14 to 18)

Note

On an NPS 1-1/4 x 1, 2 x 1, 6 x 4, 8 x 4, 8 x 6

or 12 x 6 / DN 32 x 25, 50 x 25, 150 x 100,

200 x 100, 200 x 150 or 300 x 150 body, the

rst digit indicates the end connection size

and the second digit indicates the trim size.

Order parts according to trim size unless

otherwise indicated.

Key Description Part Number

Parts Kits

            Diaphragm Cartridge and O-rings (Included are keys 5, 

6, 8, 9, 10, 11, 13, 14, 16, 18, 28, 66, 67, 70 and 121)

NPS 1 and 1-1/4 x 1 / DN 25 and 32 x 25

      17E68 Nitrile (NBR)  10C0502X032

      17E97 Nitrile (NBR)  REZRX00CS12

      17E88 Fluorocarbon (FKM)  10C0502X052

NPS 2 x 1 / DN 50 x 25

      17E68 Nitrile (NBR)  10C0502X042

      17E97 Nitrile (NBR)  REZRX00CS92

      17E88 Fluorocarbon (FKM)  10C0502X022

NPS 2 / DN 50

17E68 Nitrile (NBR) 18B5959X012

17E97 Nitrile (NBR) 18B5959X022

17E88 Fluorocarbon (FKM) 18B5959X062

NPS 3 / DN 80

17E68 Nitrile (NBR) 18B9884X022

17E97 Nitrile (NBR) 18B9884X032

17E88 Fluorocarbon (FKM) 18B9884X072

NPS 4, 6 x 4, 8 x 4 / DN 100, 150 x 100, 200 x 100

17E68 Nitrile (NBR) 18B8508X022

17E97 Nitrile (NBR) 18B8508X032

17E88 Fluorocarbon (FKM) 18B8508X072

NPS 6, 8 x 6, 12 x 6 / DN 150, 200 x 150, 300 x 150

      17E97 Nitrile (NBR)  REZRX00CS62

17E88 Fluorocarbon (FKM) 19B2840X042

NPS 8 / DN 200

      17E97 Nitrile (NBR)  REZRX00CS82

Diaphragm and O-rings (Included are

  keys 6, 8, 9, 10, 13, 14, 18, 28 and 70)

NPS 1 / DN 25

17E68 Nitrile (NBR) 19B2412X022

17E97 Nitrile (NBR) REZRX000S12

17E88 Fluorocarbon (FKM) 19B2412X072

NPS 2 x 1 / DN 50 x 25

17E68 Nitrile (NBR) 19B2412X062

17E97 Nitrile (NBR) REZRX000S92

17E88 Fluorocarbon (FKM) 19B2412X052

Type EZR

24

BODY SIZE,

NPS / DN

BODY

MATERIAL

END CONNECTION

STYLE

BODY STYLE

Standard

(Included Tapped Inlet) Tapped Inlet and Tapped Outlet

1 / 25 WCC Steel

NPT GE11581X012 - - - - - - - - - - -

SWE GE11440X012

CL150 RF  GE11583X012 14B5623X032

CL300 RF  GE11607X012 14B5623X042

CL600 RF GE11608X012 14B5623X052

SCH 40 BWE GE11610X012 14B5623X122

SCH 80 BWE GE11611X012

- - - - - - - - - - -

1-1/4 x 1 /

32 x 25 WCC Steel NPT GE11582X012

2 x 1, 2 /

50 x 25, 50

Cast iron

NPT GE10583X012

CL125 FF GE10585X012 14B5834X012

CL250 RF GE10587X012 14B5834X022

WCC Steel

NPT GE10588X012 - - - - - - - - - - -

SWE GE10682X012

CL150 RF GE10676X012 14B5834X032

CL300 RF GE10678X012 14B5834X042

CL600 RF GE10679X012 14B5834X052

SCH 40 BWE GE10680X012 14B5834X072

SCH 80 BWE GE10681X012

- - - - - - - - - - -

3 / 80

Cast iron CL125 FF GE10689X012

CL250 RF GE10698X012

WCC Steel

CL150 RF GE10699X012 14B5835X032

CL300 RF GE10700X012 14B5835X042

CL600 RF GE10701X012 14B5835X052

SCH 40 BWE GE10702X012 14B5835X102

SCH 80 BWE GE10703X012

- - - - - - - - - - -

4 / 100

Cast iron CL125 FF GE10707X012

CL250 RF GE10822X012

WCC Steel

CL150 RF GE10835X012 14B5836X032

CL300 RF GE10839X012 14B5836X042

CL600 RF GE10842X012 14B5836X052

SCH 40 BWE GE10843X012 14B5836X092

SCH 80 BWE GE10844X012

- - - - - - - - - - -

6 x 4 /

150 x 100 WCC Steel

CL150 RF GE11772X012

CL300 RF GE16359X012

CL600 RF GE17626X012

SCH 40 BWE GE16448X012

SCH 80 BWE GE16561X012

8 x 4 /

200 x 100 WCC Steel

CL150 RF GE17629X012

CL300 RF GE17630X012

CL600 RF GE17631X012

SCH 40 BWE GE17627X012

SCH 80 BWE GE17628X012

6 / 150

Cast iron CL125 FF GE11444X012

CL250 RF GE11445X012

WCC Steel

CL150 RF GE11447X012 24B5837X032

CL300 RF GE11449X012 24B5837X042

CL600 RF GE11451X012 24B5837X052

SCH 40 BWE GE11452X012 24B5837X072

SCH 80 BWE GE11453X012 - - - - - - - - - - -

Table 14. Type EZR Main Valve Body Part Numbers (key 1, Figure 14)

- continued -

Type EZR

25

*Recommended Spare Part

Table 14. Type EZR Main Valve Body Part Numbers (key 1, Figure 14) (continued)

Key Description Part Number

Parts Kits

Diaphragm and O-rings (Included are

  keys 6, 8, 9, 10, 13, 14, 18, 28 and 70) (continued)

NPS 2 / DN 50

17E68 Nitrile (NBR) 18B5952X012

17E97 Nitrile (NBR) 18B5952X022

17E88 Fluorocarbon (FKM) 18B5952X062

NPS 3 / DN 80

17E68 Nitrile (NBR) 18B9885X022

17E97 Nitrile (NBR) 18B9885X032

17E88 Fluorocarbon (FKM) 18B9885X072

NPS 4, 6 x 4 and 8 x 4 / DN 100, 150 x 100

and 200 x 100

17E68 Nitrile (NBR) 18B8507X022

17E97 Nitrile (NBR) 18B8507X032

17E88 Fluorocarbon (FKM) 18B8507X072

NPS 6, 8 x 6 and 12 x 6 / DN 150, 200 x 150

and 300 x 150

17E97 Nitrile (NBR) REZRX000S62

17E88 Fluorocarbon (FKM) 19B2837X042

NPS 8 / DN 200

17E97 Nitrile (NBR) REZRX000S82

1 Valve Body See Table 14

2 Bonnet Assembly

NPS 1 and 1-1/4 x 1 / DN 25 and 32 x 25 bodies 39B2403X022

NPS 2 x 1 and 2 / DN 50 x 25 and 50 bodies 38B2122X022

NPS 3 / DN 80 body 38B5963X022

NPS 4, 6 x 4 and 8 x 4 / DN 100, 150 x 100

and 200 x 100 bodies 38B2133X022

NPS 6, 8 x 6 and 12 x 6 / DN 150, 200 x 150

and 300 x 150 bodies 49B0355X022

NPS 8 / DN 200 body GE18697X022

3   Cap Screw

NPS 1 and 1-1/4 x 1 / DN 25 and 32 x 25

bodies (4 required) 1R281124052

NPS 2 x 1 or 2 / DN 50 x 25 or 50 body (8 required) 1A453324052

NPS 3 / DN 80 body (8 required) 1A454124052

NPS 4, 6 x 4 and 8 x 4 / DN 100, 150 x 100

and 200 x 100 bodies (8 required) 1A440224052

NPS 6, 8 x 6 and 12 x 6 / DN 150, 200 x 150

      and 300 x 150 bodies (12 required)  1U513124052

Key Description Part Number

4 Hex Nut (2 required)

NPS 1, 1-1/4 x 1, 2 x 1 and 2 / DN 25, 32 x 25

50 x 25 and 50 body 1H322228982

NPS 3, 4, 6 x 4, 8 x 4, 6, 8 x 6 and 12 x 6 /

DN 80, 100, 150 x 100, 200 x 100, 150,

        200 x 150 and 300 x 150 body  1L286338992

NPS 8 / DN 200 body 1A573528982

5 Top Plug

NPS 1, 1-1/4 x 1 and 2 x 1 / DN 25, 32 x 25

and 50 x 25 bodies

29B2404X012

NPS 2 / DN 50 body 28B2130X012

NPS 3 / DN 80 body 28B8511X012

NPS 4 / DN 100 body 28B5964X012

NPS 6 / DN 150 body 39B0370X012

NPS 8 / DN 200 body 39B5071X012

6* O-ring

NPS 1, 1-1/4 x 1, 2 x 1 and 2 / DN 25, 32 x 25,

50 x 25 and 50 bodies

Nitrile (NBR) 18B3438X012

Fluorocarbon (FKM) 1N430306382

NPS 2 / DN 50 body

Nitrile (NBR) 18B3438X012

Fluorocarbon (FKM) 1N430306382

NPS 3 / DN 80 body

Nitrile (NBR) 10A8931X012

Fluorocarbon (FKM) 10A8931X052

NPS 4, 6 x 4 and 8 x 4 / DN 100, 150 x 100

and 200 x 100 bodies

Nitrile (NBR) 10A8931X012

Fluorocarbon (FKM) 10A8931X052

NPS 6, 8 x 6 and 12 x 6

/

DN 150, 200 x 150

and 300 x 150 bodies

Nitrile (NBR) 10A3800X012

Fluorocarbon (FKM) 1R727606382

NPS 8 / DN 200 body

Nitrile (NBR) 10A3800X012

Fluorocarbon (FKM) 1R727606382

7  Cage

NPS 1, 1-1/4 x 1 and 2 x 1 / DN 25, 32 x 25

and 50 x 25 bodies

39B2413X012

NPS 2 / DN 50 body 37B9748X012

BODY SIZE,

NPS / DN BODY MATERIAL END CONNECTION

STYLE

BODY STYLE

Standard

(Included Tapped Inlet) Tapped Inlet and Tapped Outlet

8 x 6 /

200 x 150 WCC Steel

CL150 RF GE19084X012

- - - - - - - - - - -

CL300 RF GE19089X012

CL600 RF GE19090X012

SCH 40 BWE GE19091X012

SCH 80 BWE GE19092X012

12 x 6 /

300 x 150 WCC Steel

CL150 RF GE19095X012

CL300 RF GE19096X012

CL600 RF GE19097X012

SCH 40 BWE GE19093X012

SCH 80 BWE GE19094X012

8 / 200 LCC Steel

CL150 RF

- - - - - - - - - - -

FA144718X12

CL300 RF FA144717X12

CL600 RF FA144716X12

SCH 40 BWE 49B5961X022

Type EZR

26

*Recommended Spare Part

Key Description Part Number

7  Cage (continued)

NPS 3 / DN 80 body 48B5961X012

NPS 4 / DN 100 body 48B2135X012

NPS 6 x 4 / DN 150 x 100 body 29B1881X012

NPS 8 x 4 / DN 200 x 100 body 29B1883X012

NPS 6, 8 x 6 and 12 x 6 / DN 150, 200 x 150

and 300 x 150 bodies 49B0353X012

NPS 8 / DN 200 body 59B5955X012

8*   Cage O-ring (not required for NPS 2 x 1 or 8 x 6 /

DN 50 x 25 or 200 x 150) bodies

NPS 1 / DN 25 body

Nitrile (NBR) 14A5713X012

Fluorocarbon (FKM) 13A2351X012

NPS 2 / DN 50 body

Nitrile (NBR) 10B4428X012

Fluorocarbon (FKM) 10B4428X022

NPS 3 / DN 80 body

Nitrile (NBR) 10B4366X012

Fluorocarbon (FKM) 10B4366X022

NPS 4, 6 x 4 and 8 x 4 / DN 100, 150 x 100

and 200 x 100 bodies

Nitrile (NBR) 10B4373X012

Fluorocarbon (FKM) 10B4373X022

NPS 6, 8 x 6 and 12 x 6 / DN 150, 200 x 150

and 300 x 150 bodies

Nitrile (NBR) 1H862306992

Fluorocarbon (FKM) 1H8623X0022

NPS 8 / DN 200 body

Nitrile (NBR) 1V9229X0042

Fluorocarbon (FKM) 1V9229X0022

9* Diaphragm

NPS 1, 1-1/4 x 1 and 2 x 1 / DN 25, 32 x 25

and 50 x 25 bodies

17E97 Nitrile (NBR), high pressure GE11960X012

17E88 Fluorocarbon (FKM) 39B2397X022

        17E68 Nitrile (NBR), low pressure  30C1009X012

NPS 2 / DN 50 body

17E68 Nitrile (NBR), low temperature 29B1909X012

17E97 Nitrile (NBR), high pressure 28B2123X052

17E88 Fluorocarbon (FKM) 29B2715X012

NPS 3 / DN 80 body

17E68 Nitrile (NBR), low temperature 38B9886X012

17E97 Nitrile (NBR), high pressure 39B2726X012

17E88 Fluorocarbon (FKM) 38B8512X022

NPS 4, 6 x 4 and 8 x 4 / DN 100, 150 x 100

and 200 x 100 bodies

17E68 Nitrile (NBR), low temperature 38B8509X012

17E97 Nitrile (NBR), high pressure 39B3996X012

17E88 Fluorocarbon (FKM) 39B1154X012

NPS 6, 8 x 6 and 12 x 6 / DN 150, 200 x 150

and 300 x 150 bodies

17E97 Nitrile (NBR) 49B0357X012

        17E88 Fluorocarbon (FKM)  40C1035X012 

NPS 8 / DN 200 body

17E97 Nitrile (NBR)  40C1888X012

10* O-ring

NPS 1, 1-1/4 x 1, 2 x 1 and 2 / DN 25, 32 x 25,

50 x 25 and 50 bodies

Nitrile (NBR) 1E216306992

        Fluorocarbon (FKM)  1L949306382

NPS 2 / DN 50 body

Nitrile (NBR) 1E216306992

      Fluorocarbon (FKM)  1L949306382

NPS 3, 4, 6 x 4 and 8 x 4 / DN 80, 100,

150 x 100 and 200 x 100 bodies

Nitrile (NBR) 1J4888X0052

Fluorocarbon (FKM) 1J4888X0032

NPS 6, 8 x 6 and 12 x 6 / DN 150, 200 x 150

and 300 x 150 bodies

Nitrile (NBR) 11A8741X052

Fluorocarbon (FKM) 11A8741X012

Key Description Part Number

10* O-ring (continued)

NPS 8 / DN 200 body

Nitrile (NBR) 1F4636X0032

Fluorocarbon (FKM) 1N571406382

11 Bottom Plug

NPS 1, 1-1/4 x 1 and 2 x 1 / DN 25, 32 x 25

and 50 x 25 bodies 19B2407X012

NPS 2 / DN 50 body 18B2127X012

NPS 3 / DN 80 body 18B8513X012

NPS 4, 6 x 4 and 8 x 4 / DN 100, 150 x 100

and 200 x 100 bodies 18B5966X012

NPS 6, 8 x 6 and 12 x 6 / DN 150, 200 x 150

and 300 x 150 bodies 29B0763X012

NPS 8 / DN 200 body 29B5958X012

12 Main Spring

NPS 1, 1-1/4 x 1 and 2 x 1 / DN 25, 32 x 25

and 50 x 25 bodies

White 19B2399X012

        Black  GE12727X012

Red Stripe (NPS 2 x 1 / DN 50 x 25 body only) GE12501X012

        Light Blue  19B2400X012

        Black with White Stripe  19B2401X012

NPS 2 / DN 50 body

Yellow 19B0951X012

Green 18B2126X012

Red for use with travel indicator 18B5955X012

Purple for use with non-travel indicator GE05504X012

NPS 3 / DN 80 body

Yellow T14184T0012

      Light Blue  19B0781X012

      Black  19B0782X012

NPS 4, 6 x 4 and 8 x 4 / DN 100, 150 x 100

and 200 x 100 bodies

Yellow T14184T0012

Green 18B8501X012

Red 18B8502X012

NPS 6, 8 x 6 and 12 x 6 / DN 150, 200 x 150

and 300 x 150 bodies

Yellow 19B0364X012

Green 19B0366X012

Red 19B0365X012

NPS 8 / DN 200 body

Yellow GE09393X012

Green GE09396X012

Red GE09397X012

13   Flanged Locknut  

NPS 2 / DN 50 body 18B2139X012

NPS 3, 4, 6 x 4 and 8 x 4 / DN 80, 100,

150 x 100 and 200 x 100 bodies 15A7591X012

NPS 6, 8 x 6, 12 x 6 / DN 150,

200 x 150 and 300 x 150 bodies 19B0361X012

    NPS 8 / DN 200 body  10C1267X012

14* Top Plug O-ring

NPS 1, 1-1/4 x 1 and 2 x 1 / DN 25, 32 x 25

and 50 x 25 bodies

Nitrile (NBR) 13A1584X052

Fluorocarbon (FKM) 13A1584X022

NPS 2 / DN 50 body

Nitrile (NBR) 13A1584X052

Fluorocarbon (FKM) 13A1584X022

NPS 3, 4, 6 x 4 and 8 x 4 / DN 80, 100,

150 x 100 and 200 x 100 bodies

Nitrile (NBR) 10A3803X062

Fluorocarbon (FKM) 10A3803X032

NPS 6, 8 x 6 and 12 x 6 / DN 150, 200 x 150

and 300 x 150 bodies

Nitrile (NBR) T12050X0012

Fluorocarbon (FKM) T12050X0022

NPS 8 / DN 200 body

Nitrile (NBR) T12050X0012

Fluorocarbon (FKM) T12050X0022

Type EZR

27

*Recommended Spare Part

48B2142

B2617_2

MAIN VALVE ASSEMBLY FOR NPS 1, 1-1/4 x 1, 2 x 1, 2, 3, 4, 6 x 4 AND 8 x 4 / DN 25, 32 x 25, 50 x 25, 50, 80, 100, 150 x 100 AND 200 x 100 BODY SIZES

(NOTE: SEE NPS 2 x 1 / DN 50 X 25 ASSEMBLY FOR ADDITIONAL PARTS)

Figure 14. Type EZR Main Valve

Key Description Part Number

15 Stem

NPS 1, 1-1/4 x 1 and 2 x 1 /

DN 25, 32 x 25 and 50 x 25 bodies T14185T0012

NPS 2 / DN 50 body with travel indicator T14185T0012

NPS 3 and 4 / DN 80 and 100 bodies T21074T0012

NPS 6 / DN 150 body 29B0366X012

NPS 8 / DN 200 body 29B5076X012

16   Back-up Ring (2 required) 

NPS 1, 1-1/4 x 1, 2 x 1 and 2 /

DN 25, 32 x 25, 50 x 25 and 50 bodies 1N659106242

NPS 3, 4, 6 x 4, 8 x 4, 6, 8 x 6 and 12 x 6 /

DN 80, 100, 150 x 100, 200 x 100, 150,

200 x 150 and 300 x 150 bodies 1J418806992

NPS 8 / DN 200 body 1K786806992

17   Upper Spring Seat

NPS 1, 1-1/4 x 1 and 2 x 1 /

DN 25, 32 x 25 and 50 x 25 bodies 18B2129X012

NPS 2 / DN 50 body with travel Indicator 18B2129X012

NPS 3, 4, 6 x 4 and 8 x 4 /

DN 80, 100, 150 x 100 and 200 x 100 bodies 18B5968X012

NPS 6, 8 x 6 and 12 x 6 /

DN 150, 200 x 150 and 300 x 150 bodies 29B0764X012

    NPS 8 / DN 200 body  20C1357X012

Key Description Part Number

18* O-ring

NPS 1, 1-1/4 x 1, 2 x 1 and 2 / DN 25, 32 x 25,

50 x 25 and 50 bodies

Nitrile (NBR) 1H2926X0032

Fluorocarbon (FKM) 1H2926X0022

NPS 3, 4, 6 x 4, 8 x 4, 6, 8 x 6 and 12 x 6 / DN 80,

100, 150 x 100, 200 x 100, 150, 200 x 150

and 300 x 150 bodies

Nitrile (NBR) 1D191706992

Fluorocarbon (FKM) 1N423906382

NPS 8 / DN 200 body

Nitrile (NBR) 1E472706992

Fluorocarbon (FKM) 1N430406382

19 Indicator Fitting

NPS 1, 1-1/4 x 1, 2 x 1 and 2 / DN 25, 32 x 25,

50 x 25 and 50 bodies

28B2128X012

NPS 3, 4, 6 x 4 and 8 x 4 / DN 80, 100,

150 x 100 and 200 x 100 bodies 28B5969X012

NPS 6, 8 x 6, 12 x 6 / DN 150, 200 x 150

and 300 x 150 bodies 39B0358X012

    NPS 8 / DN 200 body  30C1356X012

8

7

5

11

10

70

14

2

17

19

20

21 22

15

4

6

18

16

64

12

28

9

13

1

23

Type EZR

28

*Recommended Spare Part

Key Description Part Number

19 Indicator Plug

NPS 1, 1-1/4 x 1 and 2 x 1 / DN 25, 32 x 25

and 50 x 25 bodies 19B2409X012

NPS 2 / DN 50 body GE17585X012

NPS 3, 4, 6 x 4 and 8 x 4 / DN 80, 100,

150 x 100 and 200 x 100 bodies 28B5970X012

NPS 6, 8, 8 x 6 and 12 x 6 / DN 150, 200,

200 x 150 and 300 x 150 bodies 39B0767X012

20 Indicator Washer

NPS 1, 1-1/4 x 1, 2 x 1 and 2 / DN 25, 32 x 25,

50 x 25 and 50 bodies 18B2138X012

NPS 3, 4, 6 x 4, 8 x 4, 6, 8 x 6 and 12 x 6 / DN 80,

100, 150 x 100, 200 x 100, 150, 200 x 150

and 300 x 150 bodies 18B8503X012

    NPS 8 / DN 200 body  20C2461X012

21   Indicator Cover

NPS 1, 1-1/4 x 1, 2 x 1 and 2 / DN 25, 32 x 25,

50 x 25 and 50 bodies T14188T0012

NPS 3, 4, 6 x 4 and 8 x 4 / DN 80, 100,

150 x 100 and 200 x 100 bodies 19B2270X012

NPS 6, 8, 8 x 6 and 12 x 6 / DN 150, 200,

200 x 150 and 300 x 150 bodies 19B4691X012

22 Indicator Protector

NPS 1, 1-1/4 x 1, 2 x 1 and 2 / DN 25, 32 x 25,

50 x 25 and 50 bodies 24B1301X012

NPS 3, 4, 6 x 4, 8 x 4, 6, 8, 8 x 6 and 12 x 6 / DN 80,

100, 150 x 100, 200 x 100, 150, 200, 200 x 150

and 300 x 150 bodies 29B2269X012

23 Inlet Strainer

NPS 1 and 1-1/4 x 1 / DN 25 and 32 x 25 bodies 20B8004X012

NPS 2 x 1 and 2 / DN 50 x 25 and 50 bodies 10B4409X012

NPS 3 / DN 80 body 20B4367X012

NPS 4 / DN 100 body 20B4374X012

NPS 6 / DN 150 body 20B7853X012

NPS 8 / DN 200 body 29B5966X012

23 Strainer Replacement Shim

NPS 1 and 1-1/4 x 1 / DN 25 and 32 x 25 bodies 13B8061X012

NPS 2 x 1 and 2 / DN 50 x 25 and 50 bodies 13B8062X012

NPS 3 / DN 80 body 13B8063X012

NPS 4 / DN 100 body 13B8064X012

NPS 6 / DN 150 body 13B8065X012

NPS 8 / DN 200 body 39B5967X012

24 Nameplate - - - - - - - - - - -

25 Flow Arrow

NPS 1 to 1-1/4 x 1 / DN 25 to 32 x 25 bodies 1V105938982

NPS 2 x 1, 2, 3, 4, 6 and 8 / DN 50 x 25, 50,

80, 100, 150 and 200 bodies 1V106038982

26 Drive Screw

For NPS 1 and 1-1/4 x 1 / DN 25

and 32 x 25 (4 required)

For NPS 2 x 1, 2, 3, 4 and 6 / DN 50 x 25, 50,

80, 100 and 150 (5 required)

For NPS 8 / DN 200 (6 required) 1A368228982

28* O-ring

NPS 1 and 1-1/4 x 1 / DN 25 and 32 x 25 bodies

Nitrile (NBR) 19B2838X012

Fluorocarbon (FKM) 19B2838X022

NPS 2 x 1 and 2 / DN 50 x 25 and 50 bodies

Nitrile (NBR) 18B2124X012

Fluorocarbon (FKM) 18B2124X022

NPS 3 / DN 80 body

Nitrile (NBR) 18B8514X012

Fluorocarbon (FKM) 18B8514X022

NPS 4 / DN 100 body

Nitrile (NBR) 18B2140X012

Fluorocarbon (FKM) 18B2140X022

NPS 6 / DN 150 body

Nitrile (NBR) 19B0359X012

Fluorocarbon (FKM) 10A3591X012

Key Description Part Number

28* O-ring (continued)

NPS 8 / DN 200 body

Nitrile (NBR) 1P5585X0022

Fluorocarbon (FKM) 1P5585X0032

47 Hex Nut, SA194-2H

(NPS 8 / DN 200 body only) (8 required) 1A4452X0612

63 Pilot Supply Pipe Plug (2 required) 1A767524662

64 Bonnet Pipe Plug

For NPS 2, 3, 4 and 8 / DN 50, 80, 100 and 200 1A767524662

For NPS 6 / DN 150 1A369224492

66 O-ring (NPS 8 x 6 / DN 200 x 150 body only)

Nitrile (NBR) 18A2556X022

Fluorocarbon (FKM) 18A2556X032

67 O-ring

NPS 2 x 1 / DN 50 x 25 body

Nitrile (NBR) 10B4428X012

Fluorocarbon (FKM) 10B4428X022

NPS 8 x 6 / DN 200 x 150 body

Nitrile (NBR) 1V335006562

Fluorocarbon (FKM) 1V3350X0012

70* O-ring

NPS 1, 1-1/4 x 1 and 2 x 1 / DN 25, 32 x 25

and 50 x 25 bodies

Nitrile (NBR) 13A1584X052

Fluorocarbon (FKM) 13A1584X022

NPS 2 / DN 50 body

Nitrile (NBR) 13A1584X052

Fluorocarbon (FKM) 13A1584X022

NPS 3 and 4 / DN 80 and 100 bodies

Nitrile (NBR) 10A3803X062

Fluorocarbon (FKM) 10A3803X032

NPS 6 / DN 150 body

Nitrile (NBR) T12050X0012

Fluorocarbon (FKM) T12050X0022

NPS 8 / DN 200 body

Nitrile (NBR) T12050X0012

Fluorocarbon (FKM) T12050X0022

71 Restrictor Plate

NPS 1, 1-1/4 x 1 and 2 x 1 / DN 25, 32 x 25

and 50 x 25 bodies

For 60% Capacity Trim  19B2835X012

For 30% Capacity Trim  19B2836X012

NPS 2 / DN 50 body

      For 60% Capacity Trim  18B2144X012

      For 30% Capacity Trim  18B2145X012

NPS 3 / DN 80 body

      For 60% Capacity Trim  28B8516X012

      For 30% Capacity Trim  28B8517X012

NPS 4, 6 x 4 and 8 x 4 / DN 100, 150 x 100

and 200 x 100 bodies

For 60% Capacity Trim  28B8504X012

For 30% Capacity Trim  28B8505X012

NPS 6 / DN 150 body

      For 100% Capacity Trim  49B0367X012

      For 60% Capacity Trim  49B0368X012

      For 30% Capacity Trim  49B0369X012

NPS 8 x 6 / DN 200 x 150 body

      For 100% Capacity Trim  49B0768X012

      For 60% Capacity Trim  49B0776X012

      For 30% Capacity Trim  49B0775X012

NPS 12 x 6 / DN 300 x 150 body

      For 100% Capacity Trim  49B0769X012

      For 60% Capacity Trim  49B2396X012

      For 30% Capacity Trim  49B0777X012

72 E-Ring, for Restricted Trim

NPS 1, 1-1/4 x 1 and 2 x 1 / DN 25, 32 x 25

and 50 x 25 bodies 19B2411X012

NPS 2 / DN 50 body 16A7882X012

NPS 3 / DN 80 body 18B8518X012

NPS 4 / DN 100 body 18B8506X012

Type EZR

29

Figure 14. Type EZR Main Valve (continued)

NPS 1, 1-1/4 x 1 AND 2 x 1 / DN 25, 32 x 25 AND 50 x 25

DIAPHRAGM ASSEMBLY

19B2408

TOP PLUG (KEY 5)

O-RING (KEY 14)

O-RING (KEY 70)

DIAPHRAGM (KEY 9)

BOTTOM PLUG (KEY 11)

O-RING (KEY 10)

LOCK WASHER (KEY 130)

SOCKET HEAD SCREW (KEY 129)

49B5067

NPS 2 x 1 / DN 50 x 25 MAIN VALVE ASSEMBLY

MAIN VALVE ASSEMBLY FOR NPS 6, 8 x 6 AND 12 x 6 /

DN 150, 200 x 150 AND 300 x 150 BODY SIZES

NPS 8 x 6 / DN 200 x 150 RESTRICTOR PLATE O-RING PLACEMENT

21

20

19

17

14

11

10

5

7

71

70

2

121

126

66

67 67

66

23

1

126

121

8

13

9

79

28

12

64

16

18

6

4

15

22

21

20

19

17

14

11

10

5

7

71

70

2

121

126

66

67 67

66

23

1

126

121

8

13

9

79

28

12

64

16

18

6

4

15

22

133

131

121

67

132

Type EZR

30

Figure 14. Type EZR Main Valve (continued)

MAIN VALVE ASSEMBLY FOR NPS 8 / DN 200 BODY

40C3570-C

APPLY LUBRICANT (L)

PARTS NOT SHOWN: 63

19

144

143

136

47

25

4

20

19

6

64

L

L

12

15

137

70

10

13

5

1

23

8

7

11

9

14

28

142

17

18

L

L

L

16

2

22

21

26

24

L

Type EZR

31

Figure 15. Type EZR Nameplate and Flow Arrow

B2617_A2

Figure 16. Type EZR Restricted Trim Figure 17. Type EZR Cage O-ring Placement

B2617_C B2617_D

Figure 18. Type EZR Travel Indicator Plug Option

NPS 1, 1-1/4 x 1, 2 x 1, 2, 3 AND 4 /

DN 25, 32 x 25, 50 x 25, 50, 80 AND 100 BODY SIZES

NPS 6 x 4, 8 x 4, 6, 8 x 6, 12 x 6 /

DN 150 x 100, 200 x 100, 150, 200 x 150, 300 x 150 BODY SIZES

B2617_E

72

71

8

23

19

3

19

3

3

25

26

24

Type EZR

32

19

22

1

TYPE 161EB PILOT TYPE 161EBM PILOT

Figure 19. 161EB Series Pilots

TYPE 161EBM PILOT

19

22

1

SENSE

(CONTROL)

PORT

31B5012-A

SENSE

(EXHAUST)

PORT

37B1199 37B1193

APPLY LUBRICANT (L)

11

12

8

9

38

4

6

10

7

16

2

1

3

L

17

18

15

L

11

17

16

18

19

12

22

8

38

9

7

2

3

1

15

L

4

6

L

L

Type EZR

33

161EB Series Pilots (Figure 19)

Key Description Part Number

Type 161EB Parts Kit, Nitrile (NBR)

    (included are keys 4, 6, 7 and 15)

5 to 200 psig / 0.34 to 13.8 bar R161X000012

200 to 350 psig / 13.8 to 24.1 bar R161X000022

Type 161EBM Parts Kit, Nitrile (NBR)

    (included are keys 4, 6, 7, 15, 17, 19 and 22)

5 to 200 psig / 0.34 to 13.8 bar R161MX00012

200 to 350 psig / 13.8 to 24.1 bar R161MX00022

1   Body Assembly, CF8M Stainless steel 

Types 161EB 1B7971X0252

Types 161EBM 30B8715X012

2   Spring Case, Stainless steel   27B9722X012

3 Body Plug, 303 Stainless steel 1B7975X0052

4* Valve Plug,

Nitrile (NBR) with stainless steel stem 20B9389X052

Fluorocarbon (FKM) with stainless steel stem 20B9389X062

6 Plug Spring, 302 Stainless steel 1E701337022

7* Diaphragm Assembly, Diaphragm

with Stainless steel diaphragm plate See Table 15

8   Control Spring Seat, Plated steel   See Table 15

9   Control Spring, Zinc-plated steel   See Table 15

10   Diaphragm Limiter, 303 Stainless steel   See Table 15

11 Adjusting Screw, Plated steel See Table 15

12   Locknut, Zinc-plated steel   1D667728982

13 Machine Screw, Plated steel (6 required)

Types 161EB and 161EBM 1V4360X0022

14 Pipe Plug

Type 161EB 1A767535072

15 Body Plug O-ring, Nitrile (NBR) 1F113906992

16  Closing Cap 

Nylon (PA) 24B1301X012

Metal, for pressure loading

Types 161EB and 161EBM only 17B1406X012

17*   Closing Cap Gasket, 

Pressure loading for metal closing cap

      Types 161EB and 161EBM only  1C659804022

18 Type Y602-12 Vent Assembly, Plastic 27A5516X012

19* Stem Guide Seal Assembly

Type 161EBM

Stainless steel seal and

seal retainer with Nitrile (NBR) O-ring 10B8711X012

22 O-ring (Type 161EBM) 10A0904X012

38  Lower Spring Seat  18B1248X012

KEY PART

NAME

OUTLET (CONTROL) PRESSURE RANGE AND SPRING COLOR CODE

Type 161EB or 161EBM Type 161EB(3)

5 to 15 psig /

0.34 to 1.0 bar

White

10 to 40 psig /

0.69 to 2.8 bar

Yellow

30 to 75 psig /

2.1 to 5.2 bar

Black

70 to 140 psig /

4.8 to 9.7 bar

Green

130 to 200 psig /

9.0 to 13.8 bar

Blue

200 to 350 psig /

13.8 to 24.1 bar

Red

30 to 300 psig /

2.1 to 20.7 bar

Green

7

Diaphragm Assembly,

Nitrile (NBR) 17B9055X022(1) 17B9055X022(1) 17B9055X022(1) 17B9055X022(1) 17B9055X022(1) 17B9055X032(2) 17B9055X032(2)

Diaphragm Assembly,

Fluorocarbon (FKM) 17B9055X062(1) 17B9055X062(1) 17B9055X062(1) 17B9055X062(1) 17B9055X062(1) 17B9055X052(2) 17B9055X052(2)

8 Spring Seat 17B0515X012 17B0515X012 17B0515X012 17B0515X012 17B0515X012 17B0515X012 19B9059X012

9 Spring 17B1260X012 17B1262X012 17B1259X012 17B1261X012 17B1263X012 17B1264X012 15A9258X012

10 Diaphragm Limiter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10B4407X012 10B4407X012

11 Adjusting Screw 10B3081X012 10B3081X012 10B3081X012 10B3081X012 10B3081X012 10B3080X012 17B1227X012

  1. Standard assembly for stainless steel construction; 1/32-inch / 0.8 mm thick diaphragm and 1-3/4-inch / 45 mm diaphragm plate diameter.

  2. Standard assembly for stainless steel construction; 1/32-inch / 0.8 mm thick diaphragm and 1-1/2-inch / 38 mm diaphragm plate diameter.

  3. Should only be used as the intermediate reduction pilot on the Type EZR worker/monitor systems.

Table 15. 161EB Series Pilot Part Numbers (keys 7, 8, 9, 10 and 11, Figure 19)

*Recommended Spare Part

Key Description Part Number

79 Washer (NPS 6, 8 x 6 and 12 x 6 / DN 150, 200 x 150

and 300 x 150 bodies) 19B0362X012

121 O-ring

NPS 2 x 1 / DN 50 x 25 body

Nitrile (NBR) T12587T0012

Fluorocarbon (FKM) T12587T0022

NPS 6, 8 x 6 and 12 x 6 / DN 150, 200 x 150

and 300 x 150 bodies

Nitrile (NBR) 1D269206992

Fluorocarbon (FKM) 1D2692X0022

126  Cap Screw (4 required)

    NPS 6 / DN 150 body  1L7325X0042

NPS 8 x 6 / DN 200 x 150 body 1V6816X0012

NPS 12 x 6 / DN 300 x 150 body 19B3650X022

129  Socket Head Screw 

For NPS 1, 1-1/4 x 1 and 2 x 1 / DN 25, 32 x 25

and 50 x 25 only 1D6170X0012

130  Lock Washer 

For NPS 1, 1-1/4 x 1 and 2 x 1 / DN 25, 32 x 25

and 50 x 25 only 1A329128982

131  Upper Adaptor (NPS 2 x 1 / DN 50 x 25 body only)       29B5963X012

132  Lower Adaptor (NPS 2 x 1 / DN 50 x 25 body only)  19B5964X012

133* O-ring

NPS 2 x 1

/ DN 50 x 25

body only

Nitrile (NBR) 1F262906992

Fluorocarbon (FKM) 1F2629X0012

NPS 8 / DN 200 body only 1N3330X0032

136 Stud, SA193-B7

(NPS 8 / DN 200 body only) (8 required) 11A5189X282

137  Lower Spring Seat

NPS 8 / DN 200 body only GE09140X012

143  Lifting Flange

    NPS 8 / DN 200 body only  30C1724X012

144  Yoke Locknut

NPS 8 / DN 200 body only 1E832723062

Type EZR

34

Figure 20. Types 161AY and 161AYM Pilots

B2631

B2632 B2631

TYPE 161AY

TYPE 161AYM

27

10

48

4

8

7

49

40

16

17

14

18

50

11

1

55

39

6

25

22

35

3

56

38

37

21

12

13

15

5

26

47

46

24

2

30

31

33

Type EZR

35

Type 161AY or 161AYM Pilot (Figure 20)

Key Description Part Number

  Parts Kit (included are keys 10, 11, 12, 13, 15, 25,

30, 31, 33, 45, 48 and 49) RY690AX0012

1  Body, Cast iron  1E987119012

2  Cap Screw (2 required)  1C856228992

3  Spring Case Assembly, Ductile iron  13B0109X042

4  Lower Casing, Ductile iron

Type 161AY 17B5352X012

Type 161AYM 47B3063X012

5  Orice, 303 Stainless steel

3/32-inch / 2.4 mm 0R044135032

1/4-inch / 6.4 mm 0B042035032

1/8-inch / 3.2 mm 1A936735032

6  Control Spring

6 to 15 inches w.c. / 15 to 37 mbar 1B653927022

0.5 to 1.2 psig / 34 to 83 mbar 1B537027052

1.2 to 2.5 psig / 83 mbar to 0.17 bar 1B537127022

2.5 to 4.5 psig / 0.17 to 0.31 bar 1B537227022

4.5 to 7 psig / 0.31 to 0.48 bar 1B537327052

7 Diaphragm Head 17B9723X032

8 Pusher Post 27B5354X012

10 Diaphragm

Nitrile (NBR) 37B9720X012

Fluorocarbon (FKM) 23B0101X052

11 Body Seal

Nitrile (NBR) 1H993806992

Fluorocarbon (FKM) 1H9938X0012

12 Insert Seal

Nitrile (NBR) 1B885506992

Fluorocarbon (FKM) 1B8855X0012

13  Disk Assembly

    Nitrile (NBR)  1C4248X0202

    Fluorocarbon (FKM)  1C4248X0052

14 Stem 17B3423X012

15  Cotter Pin  1A866537022

16  Lever Assembly  1B5375000B2

17 Machine Screws (2 required) 19A7151X022

Key Description Part Number

18 Guide Insert 27B4028X022

21 Hex Nut 1A354024122

22  Closing Cap

Plastic (standard) T13524T0062

Steel 1E422724092

23 Hex Nut (8 required) 1A352724122

24  Cap Screw (8 required)  1A352524052

25  Closing Cap Gasket  1P753306992

26 Vent Assembly

    Spring Case Down (Type Y602-1)  Type Y602X1-A1

     Spring Case Up (Type Y602-11)  Type Y602X1-A11

    Spring Case Sideways (Type Y602-12)  Type Y602X1-A12

27 Pipe Plug, Type 161AY only 1A369224492

30 Stem Seal O-ring

Nitrile (NBR) 1H2926G0012

Fluorocarbon (FKM) 1H2926X0022

31 Throat Seal

Nitrile (NBR) 1D682506992

Fluorocarbon (FKM) 1D6825X0012

33 Machine Screw, Type 161AYM only 18A0703X022

35 Adjusting Screw 1B537944012

37 Spring Holder 1R982025072

38 Machine Screw 10B6189X022

39 Overpressure Spring 1B541327022

40  Pusher Post Connector  27B7982X012

46 Nameplate

47 Drive Screw 1A368228982

48 Post Seal

Nitrile (NBR) 1D687506992

Fluorocarbon (FKM) 1N430406382

49  Connector Seal

Nitrile (NBR) 13A1584X012

Fluorocarbon (FKM) 13A1584X022

50  Back-up Ring  18B3446X012

55 Restriction 1D483514012

56   Bafe Plate  11B4292X012

Figure 21. 161EB Series Mounting Parts

OPTIONAL QUICK DISCONNECT UNION PILOT MOUNTING STANDARD PILOT MOUNTING

34B7733A

30B4383

R

U

N

2

4

6

29

80

81

2

4

6

8

R

U

N

S

T

A

R

T

29

Type EZR

36

161EB Series Mounting Parts (Figure 21)

Standard Conguration

Key Description Part Number

29 Pipe Nipple, Plated steel

NPS 1 / DN 25 body - - - - - - - - - - -

NPS 2 / DN 50 body - - - - - - - - - - -

NPS 3 / DN 80 body

NPS 4 / DN 100 body - - - - - - - - - - -

NPS 6, 6 x 4 and 8 x 4 /

DN 150, 150 x 100 and 200 x 100 bodies - - - - - - - - - - -

NPS 8 x 6 and 12 x 6 /

DN 200 x 150 and 300 x 150 bodies - - - - - - - - - - -

NPS 8 / DN 200 body - - - - - - - - - - -

Quick Disconnect Union Conguration

29 Pipe Nipple, Plated steel

NPS 1 / DN 25 body - - - - - - - - - - -

NPS 2 / DN 50 body - - - - - - - - - - -

NPS 3 / DN 80 body - - - - - - - - - - -

NPS 4 and 6 / DN 100 and 150 bodies - - - - - - - - - - -

NPS 6 x 4, 8 x 4, 8 x 6 and 12 x 6 /

DN 150 x 100, 200 x 100, 200 x 150

and 300 x 150 bodies - - - - - - - - - - -

NPS 8 / DN 200 body - - - - - - - - - - -

80   Union  - - - - - - - - - - -

81 Nipple - - - - - - - - - - -

*Recommended Spare Part

Pounds to Pounds (161EB Series Pilots)

Monitor System Mounting Parts

(Figure 24)

29 Pipe Nipple, Plated steel

NPS 1 / DN 25 body - - - - - - - - - - -

NPS 2 / DN 50 body - - - - - - - - - - -

NPS 3 / DN 80 body - - - - - - - - - - -

NPS 4 / DN 100 body - - - - - - - - - - -

NPS 6 / DN 150 body - - - - - - - - - - -

NPS 8 x 6 and 12 x 6 /

DN 200 x 150 and 300 x 150 bodies - - - - - - - - - - -

NPS 8 / DN 200 body - - - - - - - - - - -

38 Pipe Nipple, Plated steel - - - - - - - - - - -

161AY Series Mounting Parts (Figure 23)

For Regulator Pilot

4  Nut, SA194 (2 required)  1C330624072

29 Pipe Nipple, Plated Steel

NPS 1 and 1-1/4 x 1 /

DN 25 and 32 x 25 bodies - - - - - - - - - - -

NPS 2 x 1 and 2 /

DN 50 x 25 and 50 bodies - - - - - - - - - - -

NPS 3 / DN 80 body - - - - - - - - - - -

NPS 4 / DN 100 body - - - - - - - - - - -

NPS 6, 8 x 6 and 12 x 6 /

DN 150, 200 x 150 and 300 x 150 bodies - - - - - - - - - - -

NPS 8 / DN 200 body - - - - - - - - - - -

45 Bushing, Plated Steel - - - - - - - - - - -

46 Washer - - - - - - - - - - -

47 Nut - - - - - - - - - - -

48   U-Bolt    - - - - - - - - - - -

49   Mounting Bracket

NPS 1 and 1-1/4 x 1 /

DN 25 and 32 x 25 bodies - - - - - - - - - - -

NPS 2 x 1 and 2 / DN 50 x 25 and 50 bodies - - - - - - - - - - -

NPS 3 / DN 80 body - - - - - - - - - - -

NPS 4 / DN 100 body - - - - - - - - - - -

NPS 6, 8 x 6 and 12 x 6 /

DN 150, 200 x 150 and 300 x 150 bodies - - - - - - - - - - -

NPS 8 / DN 200 body - - - - - - - - - - -

73 Stud, Zinc-plated steel (2 required) - - - - - - - - - - -

PRX Series Mounting Parts (Figure 23)

13 Pipe Nipple - - - - - - - - - - -

21 External Elbow - - - - - - - - - - -

61  Tubing Connection (2 required)

NPS 6, 8 x 6, 12 x 6 and 8 /

DN 150, 200 x 150, 300 x 150 and 200 bodies - - - - - - - - - - -

62 Tubing

NPS 6, 8 x 6, 12 x 6 and 8 /

DN 150, 200 x 150, 300 x 150 and 200 bodies - - - - - - - - - - -

63 Nipple, Pipe, Hex

NPS 1, 1-1/4, 2x 1, 2, 3, 4, 6 x 4 and 8 x 4 /

DN 25, 32, 50 x 25, 50, 80, 100, 150 x 100

and 200 x 100 bodies - - - - - - - - - - -

64 Nipple

NPS 6, 8 x 6, 12 x 6, 8 /

DN 150, 200 x 150, 300 x 150, 200 bodies - - - - - - - - - - -

65  Coupling

NPS 6, 8 x 6, 12 x 6, 8 /

DN 150, 200 x 150, 300 x 150, 200 bodies - - - - - - - - - - -

66 Bushing

NPS 6, 8 x 6, 12 x 6, 8 /

DN 150, 200 x 150, 300 x 150, 200 bodies - - - - - - - - - - -

67 Nipple, Pipe, NPT, All sizes - - - - - - - - - - -

68 Elbow, FNPT, Pipe, All sizes - - - - - - - - - - -

69 Adaptor, NPS 4 / DN 100 body only - - - - - - - - - - -

Type 112 Restrictor (Figure 22)

14 Pipe Plug, 316 Stainless steel 1A767535072

21   Body, CB7Cu-2 Stainless steel  20B4429X012

22 Groove Valve, 416 Stainless steel 20B4403X012

23 Retainer, 416 Stainless steel 10B4402X012

24* Groove Valve O-ring (2 required),

    Fluorocarbon (FKM)  1C8538X0052

For Working Monitor Set

Key Description Part Number

4  Nut, SA194 (2 required)  1C330624072 

29 Pipe Nipple, Plated Steel

NPS 1 and 1-1/4 x 1 /

DN 25 and 32 x 25 bodies - - - - - - - - - - -

NPS 2 x 1 and 2 / DN 50 x 25 and 50 bodies - - - - - - - - - - -

NPS 3 / DN 80 body - - - - - - - - - - -

NPS 4 / DN 100 body - - - - - - - - - - -

NPS 6, 8 x 6 and 12 x 6 /

DN 150, 200 x 150 and 300 x 150 bodies - - - - - - - - - - -

38 Pipe Nipple, Plated Steel - - - - - - - - - - -

45 Bushing Plated Steel - - - - - - - - - - -

46 Washer - - - - - - - - - - -

47 Nut - - - - - - - - - - -

48   U-Bolt    - - - - - - - - - - - 

49   Mounting Bracket

NPS 1 and 1-1/4 x 1 /

DN 25 and 32 x 25 bodies - - - - - - - - - - -

NPS 2 x 1 and 2 /

DN 50 x 25 and 50 bodies - - - - - - - - - - -

NPS 3 / DN 80 body - - - - - - - - - - -

NPS 4 / DN 100 body - - - - - - - - - - -

NPS 6, 8 x 6 and 12 x 6 /

DN 150, 200 x 150 and 300 x 150 bodies - - - - - - - - - - -

NPS 8 / DN 200 body - - - - - - - - - - -

73 Stud, Zinc-plated steel (2 required) - - - - - - - - - - -

Type EZR

37

13

64

65

66

67

21

Figure 22. Type 112 Restrictor

20B4393-A

Figure 23. Types PRX and 161AY Pilot Mounting Parts

MOUNTING FOR NPS 1 THROUGH 4 /

DN 25 THROUGH 100 TYPE EZR REGULATOR

MOUNTING FOR NPS 6 AND 8 / DN 150 AND 200

TYPE EZR REGULATOR

TYPE PRX PILOT

GE18431

Pounds to Inches (161AY/161EB Series

Pilots) Monitor System Mounting Parts

(Figure 25)

Key Description Part Number

38 Pipe Nipple, Galvanized Steel - - - - - - - - - - -

45 Bushing, Plated Steel (2 required) - - - - - - - - - - -

138 Pipe Nipple, Galvanized Steel - - - - - - - - - - -

139  Coupling, Steel  - - - - - - - - - - -

140 Bushing, Plated Steel - - - - - - - - - - -

141 Pipe Nipple, Galvanized Steel - - - - - - - - - - -

TYPE 161AY PILOT

TYPE PRX PILOT

40C1205

1

NOTE:

1 NPS 4 / DN 100 BODY ONLY

TYPE 252

TYPE PRX

MOUNTING FOR NPS 1 THROUGH 6 /

DN 25 THROUGH 150 TYPE EZR REGULATOR

MOUNTING FOR NPS 8 / DN 200

TYPE EZR REGULATOR

TYPE 161AY PILOT

29

45

46

47

48

49

50

41B3471

TYPE 161AY

OR 161AYM

TYPE 112

734

NPS 1 / DN 25 ONLY

OR

29

45

46

47

48

49

50

41B3471

TYPE 161AY

OR 161AYM

TYPE 112

734

NPS 1 / DN 25 ONLY

OR

APPLY LUBRICANT

TYPE PRX

TYPE 252

23

22

24

14

21

S

T

A

R

T

R

U

N

2

4

6

8

13

21

63

69

Type EZR

38

Figure 26. Pre-piped Type EZR with Type 161EB Pilot,

Type 112 Restrictor and Type 252 Pilot Supply Filter

B2612

Figure 24. Pounds to Pounds (161EB Series Pilots) Working Monitor Mounting Parts

37B8952

81

68

62

61

PILOT

TYPE 252

Figure 25. Pounds to Inches (161AY/161EB Series Pilots)

Monitor System Mounting Parts

41B5009

29

45

46

47

48

45

38

50

TYPE 399A

OR EZR

TYPE 161

OR 161M

TYPE 161AYM

TYPE 112

29 38

Type EZR

39

Figure 27. PRX Series Pilot Assembly

TYPE PRX/120 OR PRX/120-AP

TYPE PRX/120-AP OR PRX/125-AP

TYPE PRX/125 OR PRX/125-AP

TYPE PRX/120 OR PRX/125

S - SUPPLY PORT

B - BLEED PORT

L - LOADING PORT

A - SENSING PORT

D - DAMPER

R - RESTRICTOR

Pre-piped Pilot Supply (Figure 26)

Key Description Part Number

59  Pipe Nipple, for use without Type 252 lter

NPS 1 / DN 25 body - - - - - - - - - - -

NPS 2, 3 and 4 / DN 50, 80 and 100 bodies - - - - - - - - - - -

NPS 6, 8 x 6 and 12 x 6 /

DN 150, 200 x 150 and 300 x 150 bodies - - - - - - - - - - -

60  Elbow, for use without Type 252 lter  - - - - - - - - - - -

61  Tubing Connector, for use without 

    Type 252 lter (1 required with Type 252, 

2 required without Type 252)

Steel - - - - - - - - - - -

Stainless Steel - - - - - - - - - - -

62 Tubing, Stainless steel - - - - - - - - - - -

68  External Elbow, for use with Type 252 lter

Steel - - - - - - - - - - -

Stainless Steel - - - - - - - - - - -

81  Nipple, for mounting Type 252 lter 

NPS 1, 2, 3 and 4 /

DN 25, 50, 80 and 100 bodies - - - - - - - - - - -

NPS 6, 8 x 6 and 12 x 6 /

DN 150, 200 x 150 and 300 x 150 bodies - - - - - - - - - - -

NPS 8 / DN 200 body - - - - - - - - - - -

4

35

4

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

14

1819131120

10

11

21

22

23

24

18

11

26

25

L

B

D

R

S27

28

29

30

31

30

28

32

B

S

D

L

33

27

28

29

30

31

34

28

©Emerson Process Management Regulator Technologies, Inc., 1999, 2014; All Rights Reserved

The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Fisher is a mark owned by Fisher Controls International LLC, 

a business of Emerson Process Management.

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or

guarantees, express or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specications of such

products at any time without notice.

Emerson Process Management Regulator Technologies, Inc. does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and

maintenance of any Emerson Process Management Regulator Technologies, Inc. product remains solely with the purchaser.

Industrial Regulators

Emerson Process Management

Regulator Technologies, Inc.

USA - Headquarters

McKinney, Texas 75070 USA

Tel: +1 800 558 5853

Outside U.S. +1 972 548 3574

Asia-Pacic

Shanghai 201206, China

Tel: +86 21 2892 9000

Europe

Bologna 40013, Italy

Tel: +39 051 419 0611

Middle East and Africa

Dubai, United Arab Emirates

Tel: +011 971 4811 8100

Natural Gas Technologies

Emerson Process Management

Regulator Technologies, Inc.

USA - Headquarters

McKinney, Texas 75070 USA

Tel: +1 800 558 5853

Outside U.S. +1 972 548 3574

Asia-Pacic

Singapore 128461, Singapore

Tel: +65 6770 8337

Europe

Bologna 40013, Italy

Tel: +39 051 419 0611

Chartres 28008, France

Tel: +33 2 37 33 47 00

Middle East and Africa

Dubai, United Arab Emirates

Tel: +011 971 4811 8100

TESCOM

Emerson Process Management

Tescom Corporation

USA - Headquarters

Elk River, Minnesota 55330-2445, USA

Tels: +1 763 241 3238

+1 800 447 1250

Europe

Selmsdorf 23923, Germany

Tel: +49 38823 31 287

Asia-Pacic

Shanghai 201206, China

Tel: +86 21 2892 9499

For further information visit www.fisherregulators.com

Type EZR

PRX Series Pilots (Figure 27)

Key Description Part Number

Parts Kits

  Elastomer Parts Kits (includes keys: 4, 5, 14, 17, 

18, 25 and 28)

Types PRX/120 and PRX/125

Nitrile (NBR) RPRX00X0N12

Fluorocarbon (FKM) RPRX00X0F12

Types PRX/120-AP and PRX/125-AP

Nitrile (NBR) RPRXAPX0N12

Fluorocarbon (FKM) RPRXAPX0F12

1 Adjusting Screw M0253340X12

2  Locknut   M5036008X12

3  Cap  M0253350X12

4*  Upper Cover O-ring   See Parts Kits

5* O-ring See Parts Kits

6  Upper Spring Seat   M0253360X12

7 Spring See Table 2

8  Upper Cover   M0298540X12

9  Lower Spring Seat   M0253380X12

10 Machine Screw M5011018X12

11 Washer (14 required) M5055001X12

12 Filter M4500367X12

13  Upper Diaphragm Plate (2 required)  M0253390X12

14* Diaphragm See Parts Kits

15  Lower Diaphragm Plate   M0253410X12

16 Body M0253310X12

*Recommended Spare Part

Key Description Part Number

17*  Orice O-ring   See Parts Kits

18*  Lower Cover O-ring   See Parts Kits

19  Orice   M0253440X12

20 Nut M5002004X12

21  Lower Cover   M0298600X12

22* Pad Holder

    Polyurethane (PU)   M0253400X12

Fluorocarbon (FKM) M0279950X12

23 Stem M0253430X12

24 Nameplate - - - - - - - - - - -

25* Stem O-ring See Parts Kits

26  Upper Diaphragm Nut   M5028005X12

27 Damper Adjusting Screw with Hole M0253480X12

28* Restrictor/Damper O-ring See Parts Kits

29 Plate GD25440X012

29 Damper/Restrictor Plate

Types PRX/120 and PRX/120-AP M0254400X12

Types PRX/125 and PRX/125-AP M0257930X12

30 Ring Nut (2 required) M0253490X12

31 Nameplate Screw M5061001X12

32 Restrictor Adjusting Screw with Hole M0253480X12

33 Plug (Types PRX/125 and PRX/125-AP Only) M0257920X12

34 Plug (Types PRX/125 and PRX/125-AP Only) M4500328X12

35 Spring Barrel Extension for AP M0274100X12