Emerson Type 92B Self Powered Control Valve Data Sheet

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Bulletin 71.2:92B
September 2014

Type 92B Pressure Reducing Valve

	 
•  Extended Diaphragm Service Life

  •  Two-Path Control

  •  Elevated Actuator

  •  Resilient Seats

  •  Bellows Stem Guide

  •  Double Post Stem Guide
W8264

		

  •  Standard ANSI Face-to-Face Life

D101342X012

Figure 1. Type 92B Pressure Reducing Valve

www.fisherregulators.com

Bulletin 71.2:92B
Introduction
The Type 92B Pressure Reducing Valve is the standard steam valve for industry. The Type 92B is designed to
provide decades of continuous service. It can withstand dirty operating environments while providing accurate and
stable pressure control. The Type 92B is applied as a main Pressure Reducing Valve in industrial process heating
applications such as heat exchangers, evaporators, digesters and reactors. Commercial applications include
Pressure Reducing Valves for meter runs found in district energy systems, hot water heat exchangers, absorption
chillers and boiler deaerator tanks.
The Type 92B is rated for inlet pressure up to 300 psig / 20.7 bar and inlet temperatures to
600°F / 316°C. Maximum controlled outlet pressure is 250 psig / 17.2 bar. A large
actuator and heavy main spring ensures high accuracy and stability over its entire
steam flow range.
A safety override pilot is available for the Type 92B pressure reducing valve.
The Type 92B pilot is used in a series installation with the Type 6492HM safety
override pilot installed on the upstream valve. The Type 6492HM safety override
pilot senses pressure downstream of the second valve and prevents pressure from
rising above safe operating pressure in the event the downstream valve fails. This
system is approved by ASME B31.1-1989, 122.14.2.A and can replace an ASME
safety valve when vent piping is not practical and upstream steam pressure does
not exceed 400 psig / 27.6 bar. Local codes and standards may require approval
by an appropriate authority prior to installation.

Features
•	 Extended Diaphragm Service Life—Two-ply
construction and dual flex points increases cycle
life compared to conventional designs. Stainless
steel material ensures satisfactory operation at
high steam temperatures.
•	 Resilient Seats—Valve seats are individually
lapped for tight shutoff. Beveled seats ensure
easy in-line lapping. Plug and valve seats are
constructed of hardened stainless steel which
reduces wire drawing in wet steam applications.
•	 Standard ANSI Face-to-Face—NPT, CL125 FF,
CL150 RF, CL250 RF and CL300 RF end
connections are ANSI standard face-to-face
dimensions. The Type 92B main valve is also
available with PN 16/25/40 RF end connections.
•	 Bellows Stem Guide—Pilot bellows reduces
sticking from scale build-up due to boiler carryover.

•	 Elevated Actuator—Plugging from
scale and rust is reduced as
condensate will not pool in
critical areas.
•	 Two-Path Control—Downstream
pressure registers under main
valve and pilot diaphragms
improving response time.
•	 Double Post Stem Guide—Top and
bottom seat guides with Inconel®
bushings eliminate lateral plug
instability and premature stem wear.

W1322-3A

Figure 2. Typical Type 92B Construct
Inconel® is a mark owned by Special Metals Corporation.

2

Bulletin 71.2:92B
pipe plug or tube fitting directly over orifice for ease
of accessibility
bleed orifice - easily
cleaned with wire

diaphragms and
diaphragm plate

diaphragms case

guide bushing

pilot spring case

pilot pressure
setting spring

bellows and
bellows retainer

lower spring seat

orifice

check valve 
assembly

pilot valve stem
and plug

valve plug
and seat ring

bottom flange

valve stem guide

pilot valve spring
reducing valve spring

tion

3

Bulletin 71.2:92B
Specifications
This section lists the specifications for the Type 92B Pressure Reducing Valve. The following information is
stamped on the nameplate of Type 92B: Type Number, Maximum Outlet Pressure, Maximum Inlet Pressure and
Maximum Temperature.
Available Configurations
	Pilot-operated globe-style pressure reducing valve
with post guiding and flow-to-close valve plug action.
Body Sizes and End Connection Styles
	See Table 1
Body Ratings and Maximum Inlet Pressures(1)
	See Table 3
Minimum Differential Pressures Required for
Full Stroke(1)
	20 psig / 1.4 bar with Stainless steel spring;
10 psig / 0.69 bar with Inconel® spring
Maximum Outlet (Casing) Pressure
	
Cast iron: 150 psig / 10.3 bar or body rating limits,
whichever is lower
	
Steel/Stainless steel: 300 psig / 20.7 bar or body
rating limits, whichever is lower
Outlet Pressure Ranges(1)
	See Table 2
Flow Coefficients
	See Table 5
Flow Capacities
	See Table 6
Pressure Registration
	External
Maximum Temperature Capabilities(1)
	See Table 3
Downstream Control Line Connections
	
NPS 1 and 1-1/2 / DN 25 and 40: 1/4 NPT
	
NPS 2 / DN 50: 3/8 NPT
	
NPS 3 and 4 / DN 80 and 100: 1/2 NPT
Approximate Weights
	See Table 7
Construction Materials
	Main Valve
Body, Bottom Flange, Diaphragm Case and
Diaphragm Plate: Cast iron, WCC Steel or CF8M
Stainless steel

Construction Materials (continued)
	Main Valve (continued)
Bottom Flange Gasket: Cast iron: Composition;
Steel/Stainless steel: Graphite
Diaphragms: Stainless steel
Valve Plug: 410 or 416 Stainless steel
Seat Ring: 416 Stainless steel (standard),
316 Stainless steel (seal weld option)
Valve Plug Guide Bushing: 17-4PH Stainless steel
Spring: 17-7PH Stainless steel or Inconel®
Bleed Orifice Fitting: 416 Stainless steel
Pipe Fittings: Steel or Stainless steel
	
Type 92B Pilot Mounting Parts
Cast iron: Copper tubing and brass fittings
Steel Body: Stainless steel tubing and corrosion
resistant steel fittings
Stainless steel Body: Stainless steel tubing
and fittings
	

 ype 92B Pilot
T
Body and Spring Case: Cast iron, WCC steel,
CF8M Stainless steel
Diaphragm Plate Assembly: Aluminum, Steel and
Stainless steel
Diaphragm Gasket: Cast iron: Composition;
Steel/Stainless steel: Graphite
Diaphragm, Valve Guide, and Valve Spring:
Stainless steel
Valve Stem and Orifice: 416 Stainless steel
Bellows and Bellows Retainer: Bronze (standard)
or 321 Stainless steel (high temperature/Stainless
steel pilot construction)
Spring: Steel for standard spring and Stainless
steel for high temperature spring
Upper Spring Seat: Plated steel for standard
construction and Stainless steel for high
temperature spring
Lower Spring Seat: Aluminum or Carbon steel
Screen: 304 Stainless steel
Check Valve Assembly: Stainless steel internal
with copper housing or all Stainless steel

1. The pressure/temperature limits in this Bulletin or any applicable standard limitation should not be exceeded.

Inconel® is a mark owned by Special Metals Corporation.

4

Bulletin 71.2:92B
Table 1. Body Sizes and End Connection Styles
END CONNECTION STYLES

BODY SIZES, NPS / DN
1 / 25

Cast iron Body
NPT

1-1/2 and 2 / 40 and 50

NPT, CL125 FF and CL250 RF

NPT, SWE(1), CL150 RF, CL300 RF
and PN 16/25/40 RF

Steel and Stainless steel Body

3 and 4 / 80 and 100

CL125 FF and CL250 RF

CL150 RF, CL300 RF, PN 16 RF and PN 25/40 RF

1. Available in steel bodies only.

Table 2. Outlet Pressure Ranges
PILOT TYPE

OUTLET PRESSURE

SPRING WIRE DIAMETER

SPRING FREE LENGTH

PART NUMBER

COLOR CODE

63.5
66.5
62.0

1E395627022
1D7455T0012
1E395727192

Yellow
Green
Black

2.50
2.62
2.44

63.5
66.5
62.0

1E395627022
1D7455T0012
1E395727192

Yellow
Green
Black

2.50
2.50

63.5
63.5

14B9943X012
14B9942X022

Unpainted
Unpainted

psig

bar

In.

mm

In.

mm

Low-Pressure

2 to 6
5 to 15
13 to 25

0.14 to 0.41
0.34 to 1.0
0.90 to 1.7

0.207
0.234
0.283

5.26
5.94
7.19

2.50
2.62
2.44

High-Pressure

15 to 30
25 to 75
70 to 150

1.0 to 2.1
1.7 to 5.2
4.8 to 10.3

0.207
0.234
0.281

5.26
5.94
7.14

High Temperature

15 to 100
80 to 250

1.0 to 6.9
5.5 to 17.2

0.282
0.375

7.16
9.53

Table 3. Maximum Inlet Pressures and Temperatures
BODY MATERIAL

MAXIMUM
TEMPERATURE

psig

bar

°F

°C

NPT

250

17.2

406

208

CL125 FF

125

8.6

353

178

CL250 RF

250

17.2

406

208

NPT

300

20.7

450

232

SWE

300

20.7

450

232

CL150 RF

185

12.8

450

232

CL300 RF

300

20.7

600

316(1)

PN 16/25/40 RF (NPS 1, 1-1/2, 2 and 3 / DN 25, 40, 50 and 80)

300

20.7

600

316(1)

PN 16 RF (NPS 4 / DN 100)

185

12.8

450

232

PN 25/40 RF (NPS 4 / DN 100)

300

20.7

600

316(1)
232

Cast iron

Steel

Stainless steel

MAXIMUM INLET PRESSURE

END CONNECTION

NPT

300

20.7

450

CL150 RF

175

12.1

450

232

CL300 RF

300

20.7

600

316(1)

PN 16/25/40 RF (NPS 1, 1-1/2, 2 and 3 / DN 25, 40, 50 and 80)

300

20.7

600

316(1)

PN 16 RF (NPS 4 / DN 100)

175

12.1

450

232

PN 25/40 RF (NPS 4 / DN 100)

300

20.7

600

316(1)

1. 450°F / 232°C with standard seat ring, 600°F / 316°C with seal weld option.

Table 4. Minimum Differential Pressures for Safety Override System
TYPE

6492HM

6492HTM

SPRING RANGE

SPRING COLOR

MINIMUM PRESSURE AT WHICH
MONITORING PILOT CAN BE SET

psig

bar

10 to 30

0.69 to 2.1

Yellow

10 psig / 0.69 bar over normal downstream pressure

25 to 75

1.7 to 5.2

Green

10 psig / 0.69 bar over normal downstream pressure

70 to 150

4.8 to 10.3

Black

15 psig / 1.0 bar over normal downstream pressure

15 to 100

1.0 to 6.9

Unpainted

10 psig / 0.69 bar over normal downstream pressure

80 to 250

5.5 to 17.2

Unpainted

25 psig / 1.7 bar over normal downstream pressure

5

Bulletin 71.2:92B
CONTROL
LINE

PILOT SPRING
ORIFICE

PILOT CONTROL LINE

MAIN VALVE
DIAPHRAGM

PILOT
DIAPHRAGM

PILOT
VALVE
PLUG

VALVE
PLUG

MAIN VALVE SPRING

PILOT SUPPLY LINE

E0672

INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
LOADING PRESSURE

Figure 3. Type 92B Operational Schematic

Principle of Operation
Refer to Figure 3. Compression of the pilot spring
pushes diaphragm down and holds pilot valve plug
open. Outlet pressure is changed by varying the
amount of pilot spring compression.
When steam enters the inlet of the valve, it also enters
the pilot supply line and flows through the open pilot
valve to the top of the main diaphragm. The force
created by this steam pressure on the diaphragm
overcomes the force of the main valve spring opening
the valve plug and allowing steam to flow downstream.
Downstream pressure registers under the main
diaphragm through the control line and tends to
balance the diaphragm. Steam from the downstream
system also registers under the pilot diaphragm
through line. Pressure forces the diaphragm upward,
permitting the pilot valve plug to move toward the
closed position. Flow of steam to the top of the main
diaphragm is thereby reduced and the pressure on
main diaphragm drops due to the bleed through the
orifice. The main valve moves toward the closed
position, allowing only enough steam flow to satisfy
downstream requirements.

6

When steam demand increases, the downstream
pressure decreases below the setting of the pilot
spring. The pilot opens to increase the pressure on the
main diaphragm. The main valve opens to increase
the flow downstream. Conversely, if the steam demand
decreases, the downstream pressure increases and
the pilot reacts to decrease the pressure on top of
the main diaphragm. The main valve throttles toward
the closed position and the steam flow decreases.
Thus, through the combination of pilot and main valve
operation, control of the downstream steam pressure
is maintained.
An internal check valve is included in all Type 92B
pilots to limit differential pressure on the main valve
diaphragm. In the event of a large decrease in
downstream pressure, the check valve opens to
relieve diaphragm loading pressure to the downstream
system. The check valve cartridge assembly has a
factory setting to limit differential pressure across the
diaphragm to approximately 40 psid / 2.8 bar d. If
diaphragm differential pressure reaches approximately
40 psid / 2.8 bar d, the check valve opens to relieve
diaphragm loading pressure into the downstream

Bulletin 71.2:92B
TYPE 92B PILOT (B)

TYPE 92B MAIN VALVE

TYPE 92B PILOT (C)

TYPE 92B MAIN VALVE

TYPE 6492HM SAFETY 
OVERRIDE PILOT (A)

E0794

INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
LOADING PRESSURE
INTERMEDIATE PRESSURE

Figure 4. Safety Override System Schematic

system, thereby preventing a high differential
across the diaphragm which might otherwise cause
diaphragm damage. The check valve closes and
normal operation resumes when the differential
pressure across the diaphragm is reduced to the
proper level.

Safety Override System
Refer to Figure 4. Once placed in operation, the upstream
Type 92B pilot (B) senses the intermediate pressure
between both valves and the Type 6492HM (A) pilot
senses pressure downstream of the second valve. As
demand for flow increases, intermediate pressure will
fall causing the Type 92B pilot to open. As the Type 92B
pilot opens, loading pressure to the main valve increases,
opening the main valve.
The Type 6492HM (A) safety override pilot remains
open because its setpoint is above the setpoint of
the downstream valve. In the unlikely event that the

downstream valve fails open, downstream pressure
will rise above the downstream valve’s setpoint. This
pressure is sensed by the Type 6492HM (A) safety
override pilot. As downstream pressure increases
the Type 6492HM (A) safety override pilot closes,
reducing loading pressure to the upstream main valve,
which positions the main valve to maintain desired
downstream override pressure.
In the event that the upstream valve fails, the
downstream valve will prevent downstream pressure
from rising above safe operating levels.
It is recommended to install some type of warning
system, such as a sentinel relief valve, to warn the
operator that a valve has failed in the system. This
will prevent prolonged operation with one valve, which
could cause valve trim wear and noise associated with
operation at high differential pressures.

7

Bulletin 71.2:92B
Installation
Installation of the Type 92B is dependent on the
application. As a minimum, a typical steam pressure
reducing station must include a 3-valve bypass, inlet drip
leg, inlet strainer (and steam separator if required) and
relief valve per ASME Section VIII code. A safety override
pressure reducing station can be installed in the event
a relief valve is not practical as per ASME B16.122.14
standards, subject to local codes and regulations.

Positioning and Mounting
The Type 92B regulators are intended to be installed
with their diaphragm case above the pipeline so that
condensate will not collect in the cases. In order to
obtain the performance given in this bulletin, connect
the downstream end of the control line into a straight
run of pipe. The connection should be located at
least 6 pipe diameters from the valve body outlet in
an unswaged pipeline or 10 pipe diameters from the
swage in a swaged pipeline.
The Type 92B pilot should also be installed with the
adjusting screw pointing up and the control line should
be sloped with a downward pitch to ensure drainage of
condensate. The body should be installed so the flow
is in the same direction as the arrow on the body.
Note that the Type 92B pilot may be installed on either
side of the body.

Overpressure Protection and
Relief Valve Sizing
Overpressure protection is required when piping
and components downstream of a steam regulating
valve have a maximum allowable working pressure
(MAWP) that is lower than the upstream supply
pressure to the regulating valve. In some cases,
the regulating valve itself may have a lower outlet
pressure rating than its inlet pressure rating, which
will require overpressure protection.

8

Governing codes and standards define the type
and design of overpressure protection. When full
flow relief valves are specified, they must relieve a
maximum specified flow at a pressure not to exceed
that specified by applicable codes. In North America,
the governing code for most steam regulating valve
installations is ASME Boiler Code, Section VIII, which
may be amended by local codes or variances.
The issue in sizing stream relief valves is quantifying
its maximum flow rate. Maximum flow conditions may
occur under many conditions, so the entire steam
system must be analyzed to make sure the maximum
relief valve flow is accurate. Failure to do so may
cause overpressure.
In applications where it is determined that the steam
regulating valve creates maximum flow to the relief
valve, several issues must be resolved prior to
quantifying the flow to the relief valve.
1.	 There must be general agreement on the failure
mode of the regulating valve. The Emerson
Process Management Regulator Technologies,
Inc. (Emerson™) provides wide-open regulating
coefficients to assist with sizing steam relief
valves. The coefficients assume that the valve
plug is at maximum travel and still in its normal
orientation. Contact your local Sales Office prior
to relief valve sizing in the event that there is
disagreement with the mode of failure.
2.	 Maximum steam flow must be calculated at the
 
pressure obtained at the relief valve’s full-open
condition. This pressure is typically larger than a
relief valve’s set pressure. This pressure must be
used as the outlet pressure of the steam regulating
valve when calculating the maximum flow through
the regulating valve.
3.	 Maximum steam flow should be calculated from
the manufacturer’s recommended procedure. The
Emerson recommends using either the Fisher®
steam sizing equation or IEC sizing procedure.

Bulletin 71.2:92B
BLOCK VALVE

INITIAL
PRESSURE
GAUGE

REDUCED
PRESSURE
GAUGE
SENSING LINE

BLOCK VALVE

BLOCK VALVE
TYPE 92B

STRAINER

TRAP
E0706

TYPE 92B SINGLE-STAGE INSTALLATION

REDUCED
PRESSURE
GAUGE

BLOCK VALVE

BLOCK 
VALVE

INITIAL
PRESSURE
GAUGE

SENSING LINE

STRAINER

REDUCED
PRESSURE
GAUGE

BLOCK 
VALVE

TRAP

BLOCK 
VALVE

TYPE 92B

SENSING LINE

STRAINER

BLOCK 
VALVE

TYPE 92B

TRAP

E0707

TYPE 92B SINGLE-STAGE PARALLEL INSTALLATION

BLOCK VALVE

INITIAL
PRESSURE
GAUGE

BLOCK 
VALVE

INTERMEDIATE
PRESSURE
GAUGE

BLOCK 
VALVE

REDUCED
PRESSURE
GAUGE

SENSING LINE

SENSING LINE

BLOCK 
VALVE
TRAP

STRAINER

PRIMARY 
TYPE 92B

BLOCK 
VALVE
TRAP

SECONDARY 
TYPE 92B

E0708

TYPE 92B TWO-STAGE INSTALLATION

Figure 5. Type 92B Typical Installations

9

Bulletin 71.2:92B
TYPE 92B MAIN VALVE

TYPE 6492HM SAFETY 
OVERRIDE PILOT

TYPE 92B MAIN VALVE

TYPE 92B PILOT

TYPE 92B PILOT

Top View

TYPE 92B
MAIN VALVE

TYPE 92B MAIN VALVE

TYPE 92B PILOT

TYPE 92B PILOT
TYPE 6492HM SAFETY 
OVERRIDE PILOT

Side View

Figure 6. Safety Override System Installation

Example:
Example Calculation:

RELIEF VALVE SET:  15 psig / 1.0 bar
FULL OPEN:  25 psig / 1.7 bar

Qmax(lb/hr) =

10 psig / 0.69 bar

100 psig / 6.9 bar, 338°F / 170°C

relief valve

where:

Determine the maximum valve flow capacity at
wide-open failure.
CSP1
1 + 0.00065 Tsh

SIN

3417

ΔP

C1

P1

 CS  =  74		
ΔP =  75 psia / 5.2 bar
 C1 = 35		
Tsh = 0°F
 P1  =  114.7 psia / 7.9 bar
DEG

where:
  Q   = Steam flow rate, lb/hr
 P1 = Absolute inlet pressure, psia (P1 gauge + 14.7)
 Cs = Wide-open gas sizing coefficient, see Table 5
 C1 = Flow coefficient, see Table 5
 Tsh = Degrees of steam superheat at inlet, °F
  ΔP  = Pressure drop across regulator, psia

10

75
DEG
114.7

Qmax = 8,330 lb/hr / 3778 kg/hr

NPS 2 / DN 50 TYPE 92B

Qmax(lb/hr) =

74 x 114.7
3417
SIN
1 + 0.00065 x 0
35

Bulletin 71.2:92B
Table 5. Main Valve Coefficients
FLOW COEFFICIENTS

BODY SIZE

Regulating Coefficients

IEC SIZING COEFFICIENTS

Wide-Open Coefficients

C1

Km

NPS

DN

Cg

Cs

Cv

Cg

Cs

Cv

1
1-1/2

25
40

330
560

16.5
28

9.4
16

480
921

24
46

13.7
26.3

35
35

2
3
4

50
80
100

960
2000
2700

48
100
135

27.4
57.1
77.1

1481
3042
4515

74
152
225

42.3
86.9
129

35
35
35

FL

XT

FD

0.80
0.80

0.89
0.89

0.78
0.78

0.24
0.25

0.80
0.80
0.80

0.89
0.89
0.89

0.78
0.78
0.78

0.28
0.26
0.20

Table 6. Capacities(1)
INLET
PRESSURE

OUTLET
PRESSURE

psig

bar

psig

bar

25

1.7

5
10
15

0.34
0.69
1.0

660
600
525

299
272
238

1060
1080
935

481
490
424

2060
2080
1860

934
943
844

3800
3850
3260

1724
1746
1479

4940
5000
4520

2241
2268
2050

3.4

5
10
20
30
40

0.34
0.69
1.4
2.1
2.8

1080
1080
1080
928
710

490
490
490
421
322

1830
1890
1860
1760
1660

830
857
844
798
753

3300
3390
3290
2940
2590

1497
1538
1492
1334
1175

6500
6650
6500
5740
4980

2948
3016
2948
2604
2259

8960
9110
8810
7730
6650

4064
4132
3996
3506
3016

5
10
20

0.34
0.69
1.4

1500
1500
1500

680
680
680

2510
2620
2720

1138
1188
1234

4610
4700
4770

2091
2132
2164

9080
9180
9290

4119
4164
4214

10,900
11,200
11,300

4944
5080
5126

30
40
50
60

2.1
2.8
3.4
4.1

1470
1380
1240
1020

667
626
562
463

2680
2640
2380
2120

1216
1198
1080
962

4680
4590
4370
4160

2123
2082
1982
1887

8880
8470
7680
6900

4028
3842
3484
3130

10,800
10,200
9240
8280

4899
4627
4191
3756

5
10
20

0.34
0.69
1.4

1900
1920
1920

862
871
871

3400
3440
3460

1542
1560
1569

5710
5870
5900

2590
2663
2676

11,500
11,700
11,800

5216
5307
5352

16,100
16,400
16,400

7303
7439
7439

40
60
80

2.8
4.1
5.5

1920
1700
1330

871
771
603

3500
3330
2860

1588
1510
1297

5930
5650
4960

2690
2563
2250

11,800
11,000
9670

5352
4990
4386

16,500
15,200
13,000

7484
6895
5897

5
10
20

0.34
0.69
1.4

2310
2340
2340

1048
1061
1061

4140
4170
4230

1878
1892
1919

6950
7010
7080

3152
3180
3211

13,900
14,100
14,100

6305
6396
6396

19,600
19,800
19,800

8890
8981
8981

40
60
80
100

2.8
4.1
5.5
6.9

2340
2340
2100
1630

1061
1061
952
739

4280
4400
4100
3250

1941
1996
1860
1474

7080
7250
6750
5400

3211
3289
3062
2449

14,200
14,400
13,700
11,300

6441
6532
6214
5126

19,800
19,800
18,500
15,600

8981
8981
8392
7076

20
40
60

1.4
2.8
4.1

2770
2770
2770

1256
1256
1256

5000
5070
5110

2268
2300
2318

8220
8260
8300

3728
3747
3765

16,700
16,700
16,800

7575
7575
7620

23,600
23,700
23,800

10,705
10,750
10,796

80
100
120

5.5
6.9
8.3

2770
2360
1950

1256
1070
884

4980
4600
4090

2259
2086
1855

8130
7740
7070

3688
3511
3207

15,900
15,200
13,700

7212
6895
6214

23,500
21,700
18,600

10,660
9843
8437

20
40
60

1.4
2.8
4.1

3610
3610
3610

1637
1637
1637

6480
6500
6520

2939
2948
2957

10,700
10,800
10,900

4854
4899
4944

21,900
21,900
22,000

9934
9934
9979

29,500
31,000
31,200

13,381
14,062
14,152

80
100
120
150

5.5
6.9
8.3
10.3

3610
3610
3280
2790

1637
1637
1488
1266

6550
6250
6300
6070

2971
2835
2858
2753

11,000
10,700
10,500
10,200

4990
4854
4763
4628

22,500
21,700
20,700
19,700

10,206
9843
9390
8936

31,300
30,700
29,700
28,300

14,198
13,926
13,472
12,837

50

75

100

125

150

200

5.2

6.9

8.6

10.3

13.8

CAPACITIES IN lb/h / kg/h OF SATURATED STEAM (BASED ON 10 PERCENT DROOP)
Body Size
NPS 1 / DN 25

NPS 1-1/2 / DN 40

NPS 2 / DN 50

NPS 3 / DN 80

NPS 4 / DN 100

1. Printed capacities are for the Type 92B with electropneumatic loading system.

11

Bulletin 71.2:92B
Table 6. Capacities(1) (continued)
INLET
PRESSURE

OUTLET
PRESSURE

psig

psig

bar

20
40
60

1.4
2.8
4.1

4460
4460
4460

2023
2023
2023

7850
7920
8100

3561
3592
3674

13,000
13,200
13,300

5897
5988
6033

27,200
27,300
27,300

12,338
12,383
12,383

37,300
37,800
38,500

16,919
17,146
17,464

80
100
120
150

5.5
6.9
8.3
10.3

4460
4460
4160
4050

2023
2023
1887
1837

8130
8150
7860
6780

3688
3697
3565
3075

13,400
13,400
12,700
11,500

6078
6078
5761
5216

27,400
27,500
26,300
23,000

12,429
12,474
11,930
10,433

38,700
38,800
37,000
31,000

17,554
17,600
16,783
14,062

20
40
60

1.4
2.8
4.1

5190
5190
5180

2354
2354
2350

8810
8810
8790

3996
3996
3987

15,100
15,100
15,000

6849
6849
6804

31,400
31,400
31,400

14,243
14,243
14,243

42,400
42,400
42,300

19,234
19,234
19,187

80
100
120
150

5.5
6.9
8.3
10.3

5150
5110
5040
4900

2336
2318
2286
2223

8740
8670
8550
8310

3964
3933
3878
3769

14,900
14,800
14,600
14,200

6759
6713
6623
6441

31,200
30,900
30,500
29,700

14,152
14,016
13,835
13,472

42,100
41,800
41,200
40,000

19,096
18,960
18,688
18,144

175
200
250

12.1
13.8
17.2

4730
4510
3830

2146
2046
1737

8030
7650
6510

3642
3470
2953

13,700
13,100
11,100

6214
5942
5035

28,600
27,300
23,200

12,973
12,383
10,524

38,700
36,800
31,400

17,554
16,692
14,243

250

300

bar

17.2

21.0

CAPACITIES IN lb/h / kg/h OF SATURATED STEAM (BASED ON 10 PERCENT DROOP)
Body Size
NPS 1 / DN 25

NPS 1-1/2 / DN 40

NPS 2 / DN 50

NPS 3 / DN 80

NPS 4 / DN 100

1. Printed capacities are for the Type 92B with electropneumatic loading system.

Table 7. Approximate Weights

BODY MATERIAL

Cast iron

Steel or Stainless steel

1. Add 5 lbs / 2 kg for low-pressure pilot.

12

APPROXIMATE WEIGHTS WITH 
HIGH-PRESSURE PILOT(1)

BODY SIZE

END CONNECTION STYLES
NPS

DN

lbs

kg

NPT

1
1-1/2
2

25
40
50

55
73
105

25
33
48

CL125 FF

1-1/2
2
3
4

40
50
80
100

77
110
175
243

35
50
79
110

CL250 RF

1-1/2
2
3
4

40
50
80
100

83
115
190
263

38
52
86
119

NPT

1
1-1/2
2

25
40
50

65
89
122

29
40
55

CL150 RF, PN 16 RF

1
1-1/2
2
3
4

25
40
50
80
100

77
95
132
220
285

35
43
60
100
129

CL300 RF, PN 16/25/40 RF,
PN 25/40 RF

1
1-1/2
2
3
4

25
40
50
80
100

82
102
137
225
305

37
46
62
102
138

Bulletin 71.2:92B
F - DOWNSTREAM CONTROL
LINE CONNECTION, NPT

c

e
n

g

l

1/2 A
A

npt

F - DOWNSTREAM CONTROL
LINE CONNECTION, NPT

c

E
n

g

l

b
A

flanged

Figure 7. Dimensions
Table 8. Dimensions
DIMENSIONS

BODY
SIZE

A

NPT
NPS

DN

L

CL125 FF(1)
and
CL150 RF

CL250 RF(1)
and
CL300 RF

PN 16 RF

C

PN 25/40 RF

E

G

F
NPT

In.

mm

In.

mm

In.

mm

In.

mm

In.

mm

In.

mm

In.

mm

N

In.

mm

In.

1
1-1/2
2

25
40
50

6.50
8.00
9.25

165
203
235

7.25
8.75
10.00

184
222
254

7.75
9.25
10.50

197
235
267

7.75
9.06
10.25

197
230
260

7.75
9.06
10.25

197
230
260

9.25
10.38
11.88

235
264
302

6.81
7.00
7.75

173
178
197

1/4
1/4
3/8

3.25
3.81
4.12

82.6
96.8
105

2.81
3.94
3.91

3
4

80
100

-------

-------

11.75
13.88

298
353

12.50
14.50

317
368

11.81
13.56

300
344

12.21
13.88

310
353

13.88
14.88

353
378

8.94
10.12

227
257

1/2
1/2

5.19
6.44

132
164

5.50
6.38

mm

LowPressure
Pilot

HighPressure/
High
Temp
Pilot

In.

mm

In.

mm

260
272
286

8.38
8.81
9.38

213
224
238

308
333

10.25
11.25

260
286

71.4 10.25
100(2) 10.69
99.3 11.25
140
162

12.12
13.12

1. Cast iron flanges are not available for the NPS 1 / DN 25 body.
2. 3.44 in. / 87 mm NPT bodies.

13

Bulletin 71.2:92B
Ordering Guide
Inlet Steam Conditions (Select One)

Steel

    ≤ 125 psig / 8.6 bar; 353°F / 178°C

 

    ≤ 175 psig / 12.1 bar; 450°F / 232°C

    CL150 RF Flanged

    ≤ 185 psig / 12.8 bar; 450°F / 232°C

    CL300 RF Flanged

    ≤ 250 psig / 17.2 bar; 406°F / 208°C

 

    ≤ 300 psig / 20.7 bar; 450°F / 232°C
    ≤ 300 psig / 20.7 bar; 600°F / 316°C
Main Valve Body Size and Material (Select One)
Cast Iron
 

  NPS 1 / DN 25

  NPT (NPS 1, 1-1/2 and 2)

 PN 16/25/40 RF (NPS 1, 1-1/2, 2 and 3 /
DN 25, 40, 50 and 80)

    PN 16 RF (NPS 4 / DN 100)
    PN 25/40 RF (NPS 4 / DN 100)
Stainless steel
 

  NPT (NPS 1, 1-1/2 and 2)

    CL150 RF Flanged

    NPS 1-1/2 / DN 40

    CL300 RF Flanged

    NPS 2 / DN 50

 

    NPS 3 / DN 80
    NPS 4 / DN 100
Steel
 

  NPS 1 / DN 25

 PN 16/25/40 RF (NPS 1, 1-1/2, 2 and 3 /
DN 25, 40, 50 and 80)

    PN 16 RF (NPS 4 / DN 100)
    PN 25/40 RF (NPS 4 / DN 100)
Main Valve Spring (Select One)
  17-7PH Stainless steel (standard)***

    NPS 1-1/2 / DN 40

 

    NPS 2 / DN 50

   Inconel® (optional)**

    NPS 3 / DN 80

Pilot Material (Select One)

    NPS 4 / DN 100
Stainless steel
 

  NPS 1 / DN 25

    NPS 1-1/2 / DN 40
    NPS 2 / DN 50
    NPS 3 / DN 80
    NPS 4 / DN 100

 

  Cast iron

   Steel
    Stainless steel
Pilot Type and Spring Range (Select One)
High-Pressure
 

  15 to 30 psig / 1.0 to 2.1 bar, Yellow

    25 to 75 psig / 1.7 to 5.2 bar, Green

End Connection Style (Select One)

    70 to 150 psig / 4.8 to 10.3 bar, Black

Cast Iron

Low-Pressure

 

  NPT (NPS 1, 1-1/2 and 2)

   CL125 FF Flanged (NPS 1-1/2, 2, 3 and /
DN 40, 50, 80 and 100)

 

  2 to 6 psig / 0.14 to 0.41 bar, Yellow

    5 to 15 psig / 0.34 to 1.0 bar, Green
 

  13 to 25 psig / 0.90 to 1.7 bar, Black

   CL250 RF Flanged (NPS 1-1/2, 2, 3 and 4 /
DN 40, 50, 80 and 100)

- continued Inconel is a mark owned by Special Metals Corporation.
®

14

Bulletin 71.2:92B
Ordering Guide (continued)
High Temperature

Type 6492HTM Pilot Spring Range

 

 

  15

to 100 psig / 1.0 to 6.9 bar, Unpainted

  15

to 100 psig / 1.0 to 6.9 bar, Unpainted

    80 to 250 psig / 5.5 to 17.2 bar, Unpainted

    80 to 250 psig / 5.5 to 17.2 bar, Unpainted

Pilot Mounting Position (Select One)

Main Valve Replacement Parts Kit (Optional)

Facing inlet side of main valve with diaphragm
case up, pilot is mounted:
    On left side with pilot adjusting screw pointed up

   Yes, send one main valve replacement parts kit to
match this order.
Replacement Pilot (Optional)

    On right side with pilot adjusting screw pointed up

    Yes, send one replacement pilot to match this order.

Options (Select One)

Pilot Replacement Parts Kit (Optional)

    Standard Adjusting Screw
    Sealed Adjusting Screw

   Yes, send one pilot replacement parts kit to match
this order.

   Handwheel
Safety Override System (Optional)
Type 6492HM Pilot Spring Range
 

  10 to 30 psig / 0.69 to 2.1 bar, Yellow

    25 to 75 psig / 1.7 to 5.2 bar, Green
    70 to 150 psig / 4.8 to 10.3 bar, Black

Steam Specification Worksheet
Application:
Tag Number:
Valve Type:      Direct-Operated	   Pilot-Operated
	
  
Pressure Loaded	   Differential
 Iron	    Stainless steel
Body Material:	 Steel	
Inlet/Outlet End Connection Style:	
  CL150 RF Flange
	      CL125 FF Flange	
	      CL250 RF Flange	
  CL300 RF Flange 	
	      PN 16/25/40 RF	
 NPT
Inlet/Outlet Pipe Size:		

Regulators Quick Order Guide
***
**
*

Readily Available for Shipment
Allow Additional Time for Shipment
Special Order, Constructed from Non-Stocked Parts.
Consult your local Sales Office for Availability.

Availability of the product being ordered is determined by the component with the
longest shipping time for the requested construction.

Steam Conditions:
  Inlet Pressure (psig / bar)
  Inlet Temperature (°F / °C)
  Outlet Pressure (psig / bar)

Maximum

In. / mm

Normal

Minimum

      Flow (lb/h or kg/h)

Performance Required:
Accuracy Requirements:	
  ≤ 10%	    ≤ 20%
			   ≤ 30%	    ≤ 40%

15

Bulletin 71.2:92B

Industrial Regulators

Natural Gas Technologies

TESCOM

Emerson Process Management
Regulator Technologies, Inc.

Emerson Process Management
Regulator Technologies, Inc.

Emerson Process Management
Tescom Corporation

USA - Headquarters
McKinney, Texas 75070 USA
Tel: +1 800 558 5853
Outside U.S. +1 972 548 3574

USA - Headquarters
McKinney, Texas 75070 USA
Tel: +1 800 558 5853
Outside U.S. +1 972 548 3574

USA - Headquarters
Elk River, Minnesota 55330-2445, USA
Tels: +1 763 241 3238
    +1 800 447 1250

Asia-Pacific
Shanghai 201206, China
Tel: +86 21 2892 9000

Asia-Pacific
Singapore 128461, Singapore
Tel: +65 6770 8337

Europe
Selmsdorf 23923, Germany
Tel: +49 38823 31 287

Europe
Bologna 40013, Italy
Tel: +39 051 419 0611

Europe
Bologna 40013, Italy
Tel: +39 051 419 0611
Chartres 28008, France
Tel: +33 2 37 33 47 00

Asia-Pacific
Shanghai 201206, China
Tel: +86 21 2892 9499

Middle East and Africa
Dubai, United Arab Emirates
Tel: +971 4811 8100

Middle East and Africa
Dubai, United Arab Emirates
Tel: +971 4811 8100

For further information visit www.fisherregulators.com
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 specifications 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.

©Emerson Process Management Regulator Technologies, Inc., 1980, 2014; All Rights Reserved



---

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