Emerson S200 Series Pressure Reducing Regulators Installation Guide S200_IG_done.p65

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Installation Guide
English – May 2002

S200 Series

Introduction
Available in Cast iron body only.
S208, S208H, S208P, S208K, S208PK: S201,
S201H, S201P, S201K, and S201PK constructions
with a Type VSX-2 slam-shut device to provide overpressure (OPSO) or over and underpressure (UPSO)
protection. Available in Ductile iron body only.
S209, S209H, S209P: S202, S202H, and S202P
constructions with a Type VSX-2 slam-shut device
to provide overpressure (OPSO) or over and underpressure (UPSO) protection. Available in Ductile
iron body only.

This installation guide provides instructions for installation,
startup, and adjustment. To receive a copy of the instruction
manual,
contact
your
local
Fisher
Sales
Office or Sales Representative or view a copy at
www.FISHERregulators.com. For further information refer to:
• Type S201 and S202 Instruction Manual, form 5171,
D400007X012
• Type S201P, S201PK, and S202P Instruction Manual,
form 5172, D400009X012
• Type S203, S203H, and S203P1-P3 Instruction Manual,
form 2216, D400010X1012
• Types S204 and S206 Instruction Manual, form 1749,
D400011X012
• Types S208 and S209 Instruction Manual, form5412,
D102247X012

Body Sizes and End Connection Styles(1)
See table 2
Minimum and Maximum Inlet Pressures(1)
Maximum Emergency (Body Rating) Inlet
Pressure: 12 bar (175 psig)
Maximum Operating Inlet Pressure: See table 4
Types S204 and S206 Minimum Inlet Pressure
Required to Prevent Shutoff: See figure 1

P.E.D. Categories
This product may be used as a safety accessory with
pressure equipment in the following Pressure Equipment
Directive 97/23/EC categories. It may also be used outside of the Pressure Equipment Directive using sound
engineering practice (SEP) per table below.
PRODUCT SIZE

CATEGORIES

FLUID TYPE

D N 32, 40, 40 x 50, 50
(1-1/4, 1-1/2, 1-1/2 x 2, 2)

I

1

Maximum Outlet Pressure (Casing)(1)
1,0 bar (15 psig)
Maximum Operating Outlet Pressure to Avoid Internal
Part Damage(1)
Light Diaphragm Plate: 0,14 bar (2 psi) above
outlet pressure setting
Heavy Diaphragm Plate: 0,21 bar (3 psi) above
outlet pressure setting
Outlet Pressure Ranges(1)
See table 3

Specifications

Integral Monitor Performance(1)
See table 5

Available Constructions (See table 1)
S201: Basic construction without internal relief for
5 to 75 mbar (2 to 30-inches w.c.) outlet pressures
S201H: S201 with a heavy diaphragm plate for 0,069
to 0,34 bar (1 to 5 psig ) outlet pressures
S201K: S201 with a heavy diaphragm plate for 0,14
to 0,69 bar (2 to 10 psig) outlet pressures
S201P: S201 with downstream control line connection and O-ring stem seal for external pressure
registration
S201PK: Combination of S201K and S201P
S202, S202H, S202P: S201, S201H, and S201P
constructions with internal relief
S203, S203H, S203P: S201, S201H, and S201P
constructions with “True” monitor regulator to
provide overpressure protection. Available in Cast
iron body only.
S204, S204H: S201 and S201H constructions with
a low outlet pressure shutoff. Available in Cast
iron body only.
S206, S206H: S202 and S202H constructions with
a low outlet pressure shutoff with internal relief.

Internal Relief Performance(1)
Internal relief valve opens at 20 to 69 mbar
(7 to 28-inches w.c.) above outlet setting, depending
on control spring
Type VSX-2 Trip Pressure Ranges(1)
See table 6
Proof Test Pressure
All Pressure Retaining Components have been
proof tested per Directive 97/23/EC - Annex 1,
Section 7.4
Maximum Temperature Capabilities(1)
Nitrile (NBR): –29° to 66°C (–20° to 150°F)
Fluoroelastomer (FKM): –18° to 93°C (0° to 200°F)
(Upper temperature limitation due to nylon flappers)
Type VSX-2: –29° to 60°C (–20° to 140°F)
1. The pressure/temperature limits in this installation guide and any applicable
standard or code limitation should not be exceeded.

Table 1. Available Constructions

S203H

S203P

S204

S204H

S206

S206H

X

X

X

X

X

X

X

X

X

X

Steel

X

X

X

X

X

X

X

X

www.FISHERregulators.com

X

X

X

X

X

X

X

X

D400007XENG

S203

X

X

S209P

S202P

X

X

S209H

S202H

X

X

S209

S202

X

X

S208PK

S201PK

X

X

S208P

S201P

X

X

S208K

S201K

X

Ductile Iron

S208H

S201H

Cast Iron

BODY MATERIALS

S208

S201

TYPE NUMBER

S200 Series
Table 2. Body Sizes and End Connection Styles
END CONNECTION STYLE
BODY SIZE, DN (INCHES)

Cast Iron

Ductile Iron

Steel

32 (1-1/4)
40 (1-1/2)
40 x 50 (1-1/2 x 2)

NPT, BSP
NPT, BSP
---

--NPT, BSP
NPT, BSP

--NPT, BSP
---

50 (2)

NPT; BSP; or ANSI Class 125FF(1),
250RF flanged

NPT; BSP; ANSI Class 125FF or
250RF flanged; or PN 10-16 flanged

NPT; BSP; ANSI Class 150RF or
300RF flanged; or PN 10-16 flanged

1. This flange is available with a face-to-face of 191 mm (7.5-inches) or 254 mm (10-inches).

Table 3. Outlet Pressure Ranges
TYPE NUMBER

SPRING
NUMBER

S201, S202, S203(1), S208, S209
S201P, S202P, S203P,
S208P, S209P

--1
2
3
4

5 to 11 mbar(2,3)
9 to 16 mbar
12 to 22 mbar
21 to 45 mbar
35 to 75 mbar

S 204, S 206

-----------

9 to 12 mbar(2)
12 to 17 mbar
16 to 23 mbar
21 to 45 mbar
35 to 75 mbar

S201H, S202H, S203H(1), S208H, S209H,
S201P(4), S202P(4), S203P(4),
S204H, S206H, S208P(4), S209P(4)

5
6
7

0,069 to 0,14 bar
0,10 to 0,22 bar
0,14 to 0,34 bar(5)

S 201K , S 201P K ,
S 208K , S 208P K

8
9

0,14 to 0,38 bar
0,28 to 0,69 bar

S204H, S206H

-----

0,069 to 0,14 bar
0,10 to 0,22 bar

CONTROL SPRING
COLOR CODE

OUTLET PRESSURE RANGE
(2 to 4-1/2-inches w.c.)(2,3)
(3.5 to 6.5-inches w.c.)
(5 to 9-inches w.c.)
(8.5 to 18-inches w.c.)
(14 to 30-inches w.c.)

Brown
Red
Black
Gray
Dark green

(3.5 to 5-inches w.c.)(2)
(5 to 7-inches w.c.)
(6.5 to 9.5-inches w.c.)
(8.5 to 18-inches w.c.)
(14 to 30-inches w.c.)

Brown
Red
Black
Gray
Dark green

(1 to 2 psig)
(1.5 to 3.25 psig)
(2 to 5 psig)(5)

Dark blue
Orange
Yellow

(2 to 5.5 psig)
(4 to 10 psig)

Green stripe
Unpainted

(1 to 2 psig)
(1.5 to 3.25 psig)

Dark blue
Orange

1. Types S203 and S203H outlet pressure ranges are a function of the monitor construction (monitor spring and the number of spring seats used). See Table 5 for more information.
2. With regulator installed so control spring is on top of diaphragm. If installed so control spring is on bottom, lower end of outlet pressure range can be reduced by 2,5 mbar (1-inch
w.c.) for regulator with light diaphragm plate or 5,0 mbar ( 2-inches w.c.) for regulator with heavy diaphragm plate.
3. Not available with Types S208 and S209.
4. Types S201P, S202P, S203P, S208P, and S209P require heavy diaphragm plate for outlet pressures over 0,069 bar (1 psig).
5. Not available for Types S203P, S204H, and S206H.

Table 4. Additional Specifications
TYPE NUMBER

OUTLET PRESSURE
SETTING

S201, S201P,
S202, S202P,
S203, S203P,
S208, S208P,
S 209, S 209P

5 to 75 mbar
(2 to 30-inches w.c.)

S201H, S201P,
S202H, S202P,
S203H, S203P,
S208H, S208P,
S209H, S209P

0,069 to 0,22 bar
(1 to 3.25 psig)

All outlet
pressure settings
S 201K , S 201P K
S 208K , S 208P K

2

0,14 to 0,38 bar
(2 to 5.5 psig)
0,28 to 0,69 bar
(4 to 10 psig)

S 204,
S 206

9 to 75 mbar
(3.5 to 30-inches w.c.)

S204H,
S 206H

0,069 to 0,22 bar
(1 to 3.25 psig)

ORIFICE SIZE, mm (INCH)
6,4
9,5
12,7
19,1
25,4
30,2
6,4
9,5
12,7
19,1
25,4
30,2
6,4
9,5
12,7
19,1
25,4

(1/4)
(3/8)
(1/2)
(3/4)
(1)
(1-3/16)
(1/4)
(3/8)
(1/2)
(3/4)
(1)
(1-3/16)
(1/4)
(3/8)
(1/2)
(3/4)
(1)

MAXIMUM OPERATING INLET PRESSURE TO
OBTAIN OPTIMUM PERFORMANCE, bar (PSIG)
8,6 (125)
8,6 (125)
6,9 (100)
4,1 (60)
1,7 (25)
0,90 (13)
8,6 (125)
8,6 (125)
6,9 (100)
4,1 (60)
2,1 (30)
1,0 (14)
8,6 (125)
8,6 (125)
6,9 (100)
4,1 (60)
2,1 (30)

30,2 (1-3/16)

1,4 (20)

30,2 (1-3/16)

1,7 (25)

9,5
12,7
19,1
25,4
30,2
9,5
12,7
19,1
25,4
30,2

6,9
6,9
5,2
2,1
1,0
6,9
6,9
5,2
2,1
1,0

(3/8)
(1/2)
(3/4)
(1)
(1-3/16)
(3/8)
(1/2)
(3/4)
(1)
(1-3/16)

(100)
(100)
(75)
(30)
(15)
(100)
(100)
(75)
(30)
(15)

S200 Series
Table 5. Integral Monitor Data
TYPE
NUMBER

CONTROL SPRING
COLOR
(SEE TABLE 3
FOR RANGE)
Brown

0 to 12 mbar (0 to 5-inches w.c.)

Red / Black

10 to 24 mbar (4 to 9.5-inches w.c.)

S 203,
S 203P

20
20
25
27

Gray

to
to
to
to

35
30
50
52

mbar
mbar
mbar
mbar

RELIEF
MONITOR
SPRING COLOR

NUMBER OF
SPRING
SEATS
REQUIRED

Green

0

55 (0.8 psig)

(8 to 14-inches w.c.)
(8 to 12-inches w.c.)
(10 to 20-inches w.c.)
(11 to 21-inches w.c.)

35 to 70 mbar (14 to 28-inches w.c.)
45 to 82 mbar (18 to 33-inches w.c.)
35 to 70 mbar (0.5 to 1.0 psig)

Dark green

S203H,
S 203P

MAXIMUM DOWNSTREAM
PRESSURE WITH
INTEGRAL MONITOR IN
OPERATION, bar (PSIG)

OUTLET PRESSURE RANGE

Green

1

-(1.4)
(1.8)
(2.2)

Green
Red
Red
Blue

2
0
1
0

193 (2.8)
207 (3.0)
207 (3.0)

Red
Blue
Silver

2
1
0

-96
124
152

Dark blue

70 to 110 mbar (1.0 to 1.6 psig)
52 to 110 mbar (0.75 to 1.6 psig)

262 (3.8)
276 (4.0)

Blue
Silver

2
1

Orange

86 to 155 mbar (1.25 to 2.25 psig)
86 to 224 mbar (1.25 to 3.25 psig)

345 (5.0)
413 (6.0)

Silver
Silver

2
3

Table 6. Type VSX-2 High and Low Trip Pressure Ranges
SETPOINT RANGES

Overpressure Shutoff
(OPSO)

SLAM-SHUT TYPE

LP

USE WITH MAIN VALVE SPRING
NUMBER(1)
1, 2

30 to 63 mbar (12 to 25-inches w.c.)

1, 2, 3, 4

50 to 130 mbar (20 to 52-inches w.c.)

3, 4, 5, 6

95 to 270 mbar (1.4 to 3.9 psig)

5, 6, 7, 8, 9

260 to 600 mbar (3.8 to 8.7 psig)

9

Underpressure Shutoff
(UPSO)

LP

MINIMUM TO MAXIMUM
TRIP PRESSURE

400 to 1100 mbar (5.8 to 16 psig)

2, 3

6 to 30 mbar (2 to 12-inches w.c.)

3, 4, 5, 6

10 to 75 mbar (4 to 30-inches w.c.)

5, 6, 7, 8

25 to 160 mbar (0.36 to 2.3 psig)

7, 8, 9

100 to 750 mbar (1.5 to 10.8 psig)

1. See table 3 for main valve spring number.

Installation

Only qualified personnel should install or service
a regulator. Regulators should be installed,
operated, and maintained in accordance with
international and applicable codes and
regulations, and Fisher instructions.
If the regulator vents fluid or a leak develops in
the system, it indicates that service is required.
Failure to take the regulator out of service
immediately may create a hazardous condition.
Personal injury, equipment damage, or leakage due
to escaping fluid 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 the Specifications section, or
where conditions exceed any ratings of the adjacent
piping or piping connections.
To avoid such injury or damage, provide pressurerelieving 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
result in personal injury and property damage due
to escaping fluid. To avoid such injury and damage,
install the regulator in a safe location.

Clean out all pipelines before installation of the regulator
and check to be sure the regulator has not been damaged or
has collected foreign material during shipping. For NPT
bodies, apply pipe compound to the male pipe threads. For
flanged bodies, use suitable line gaskets and approved
piping and bolting practices. Install the regulator in any
position desired, unless otherwise specified, but be sure
flow through the body is in the direction indicated by the arrow
on the body.
Note
It is important that the regulator be installed so that
the vent hole in the spring case is unobstructed at all
times. For outdoor installations, the regulator should
be located away from vehicular traffic and positioned
so that water, ice, and other foreign materials cannot
enter the spring case through the vent. Avoid placing
the regulator beneath eaves or downspouts, and be
sure it is above the probable snow level.

Type VSX-2 Installation
The Type VSX-2 may be shipped separately from the
regulator. To install the unit on a regulator, place the new Orings (keys 2 and 3) on the Type VSX-2 and slide the module
into the regulator body. Secure the Type VSX-2 to the regulator
body with the four set screws (key 4). The unit may be oriented
in any direction with respect to the sensor line connection.

3

S200 Series
Overpressure Protection

Startup

26.8

53.6

80.4

107

134

160

188

214
3.0

5/8-INCH (15,9 mm)
SEAT RING

40

2.0

30
1/2-INCH (12,7 mm)
SEAT RING

20
1.0

1-INCH (25,4 mm)
SEAT RING
1-3/16-INCH (30,2 mm)
SEAT RING

10

0

0

MINIMUM INLET PRESSURE, bar

Regulator operation below the maximum pressure limitations
does not preclude the possibility of damage from external
sources or debris in the line. The regulator should be inspected
for damage after any overpressure condition.

50
MINIMUM INLET PRESSURE, PSIG

The recommended pressure limitations are stamped on
the regulator nameplate. Some type of overpressure
protection is needed if the actual inlet pressure exceeds the
maximum operating outlet pressure rating. Overpressure
protection should also be provided if the regulator inlet
pressure is greater than the safe working pressure of the
downstream equipment.

FLOW RATE, m3/h(n) OF 0.6 SPECIFIC GRAVITY NATURAL GAS
0

0
1000
2000
3000
4000
5000
6000
7000
8000
FLOW RATE, SCFH OF 0.6 SPECIFIC GRAVITY NATURAL GAS

The regulator is factory set at approximately the midpoint of
the spring range or the pressure requested, so an initial
adjustment may be required to give the desired results. With
proper installation completed and relief valves properly
adjusted, slowly open the upstream and downstream shutoff
valves.

Figure 1. Minimum Inlet Pressure Required to Prevent Shutoff
on all Sizes of S204, S204H, S206, and S206H Regulators at
Indicated Flow

Type VSX-2 Startup

To adjust the Overpressure Trip Spring:

The Type VSX-2 is shipped in the tripped position and will
need to be reset. If the Type VSX-2 is a high trip only, it can be
reset before starting the regulator. If the Type VSX-2 is a high
and low trip, the regulator will have to be started and the
downstream system pressurized before the Type VSX-2 can
be reset.

1. Adjust the overpressure trip setting to its maximum
compression.

3. Backpressure the unit with the desired trip pressure.
4. Reduce the overpressure trip spring compression until
the Type VSX-2 trips.

Adjustment
To change the outlet pressure, remove the closing cap or
loosen the locknut and turn the adjusting screw clockwise
to increase outlet pressure or counterclockwise to decrease
pressure. Monitor the outlet pressure with a test gauge
during the adjustment. Replace the closing cap or tighten
the locknut to maintain the desired setting.

Type VSX-2 Trip Adjustment
Note
An adjustment tool is included with the Type VSX-2.
Use only this tool to make adjustments to the unit.
To make adjustments, the overpressure trip spring
is found under the outer adjusting screw and the
underpressure trip spring is found under the inner
adjusting screw.

4

2. If present, adjust the underpressure spring to its
minimum compression.

To adjust the Underpressure Trip Spring:
1. Adjust the underpressure trip spring back to its minimum
compression.
2. Backpressure the unit with the desired trip pressure.
3. Increase the underpressure trip spring compression until
the Type VSX-2 trips.

Taking Out of Service (Shutdown)

To avoid personal injury resulting from sudden
release of pressure, isolate the regulator from all
pressure before attempting disassembly.

S200 Series
Type S201 and S202 Parts List
Key Description
1
2
3
4
5
6
7A
7B
8
9
10
11
12
13
14
15
16
17
18
19
20
21
24
25
32
46
53
55
56
57
58
59
60
61
62

Spring Case
Spring
Adjusting Screw
Closing Cap
Closing Cap Gasket
Upper/Lower Spring Seat
Diaphragm
Diaphragm Head
Pusher Post
Lower Casing Assembly
Lever
Pin
Machine Screw
Valve Stem Assembly
Cap Screw
Hex Nut
Disk Holder Assembly
Diaphragm Plate
Cap Screw
O-Ring
Seat Ring
Body
Cap Screw
Relief Valve Spring
Nameplate
Pipe Plug
Hex Nut
Flapper Stem
Lower Flapper
Upper Flapper
Seat Ring
Self-Tapping Screw
Spring
Screen
Snap Ring

Figure 2. Type S202 Assembly

50A9455

Type S204 and S206 Parts List
Key Description
1
2
3
4
5
6
7
7A
8
8
9
10
11
12
13
14
15
16
18
19
20
21
24
25
26
27
28
32
33
34
55
56
57
58
59
60
61
62

Spring Case
Spring
Adjusting Screw
Closing Cap
Closing Cap Gasket
Lower Spring Seat
Diaphragm & Head Assembly
Diaphragm
Pusher Post (S204)
Ball Stem Assembly (S206)
Lower Casing Assembly
Lever
Pin
Machine Screw
Valve Stem Assembly
Cap Screw
Hex Nut
Disk Holder Assembly
Cap Screw
O-Ring
Seat Ring
Body
Reset Stem
Relief Valve Spring (S206)
Back Disk Spring
Back Disk Holder
Disk Spacer
Nameplate
Valve Stem
Gasket
Flapper Stem
Lower Flapper
Upper Flapper
Seat Ring
Self-Tapping Screw
Spring
Screen
Snap Ring

50A9457

Figure 3. Type S206 Assembly

5

S200 Series
Type S208 and S209 Parts List
Key Description
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
19
20
21
24
25
32
55
56
57
58
59
60
61
62
63
64
65
67
94
121
122
123

Spring Case
Spring
Adjusting Screw
Closing Cap
Closing Cap Gasket
Lower Spring Seat
Diaphragm and Diaphragm Head
Pusher Post
Lower Casing Assembly
Lever
Pin
Machine Screw
Valve Stem Assembly
Cap Screw
Hex Nut
Disk Holder
Diaphragm Head
O-Ring
Orifice
Body
Stem
Relief Valve Spring
Nameplate
Flapper Stem
Lower Flapper
Upper Flapper
Orifice
Self-Tapping Screw
Spring
Screen
Snap Ring
Retaining Ring
O-Ring
O-Ring
Stem Adaptor
Relief Restriction
Insert
O-Ring
Pipe Plug

T80388-C
B2495-2

T80388-C
B2508-2

Figure 4. Type S209 Assembly

Type VSX-2 Parts List

VIEW A

Key Description
1
2
3
4
6
7
8
10
11
13

VSX-2 Module
Upper O-Ring
Lower O-Ring
Set Screw
Vent Assembly
High-Pressure Control Spring
Low-Pressure Control Spring
Machine Screw
Gasket
Pipe Plug

VIEW A

T80390-A2
B2517-2

Figure 5. Type VSX-2 Assembly

©Fisher Controls International, Inc., 2002; All Rights Reserved
Fisher and Fisher Regulators are marks owned by Fisher Controls International, Inc. The Emerson logo is a trade mark and service mark of Emerson Electric Co.
All other marks are the property of their respective owners.

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 specifications of such products at any time without notice.

For information, contact Fisher Controls, International:
Within USA (800) 588-5853 – Outside USA (972) 542-0132
Italy – (39) 051-4190-606
Singapore – (65) 770-8320
Mexico – (52) 57-28-0888
Printed in U.S.A.

www.FISHERregulators.com



---

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