92B Bulletin

Bulletin 71.2:92B 02/02

Type 92B Pressure Reducing Valve (PRV) and Type 92P Air-Loaded Pressure Reducing Valve ✰ Extended Diaphragm Service Life

✰ Two-Path Control

✰ Elevated Actuator

✰ Resilient Seats

✰ Bellows Stem Guide

✰ Double Post Stem Guide W8264

Figure 1. Type 92B Pressure Reducing Valve

D101342X012

✰ Standard ANSI Face-to-Face

06/01

www.FISHERregulators.com

Bulletin 71.2:92B Introduction The Type 92B PRV 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 (PRV) in industrial process heating applications such as heat exchangers, evaporators, digesters, and reactors. Commercial applications include PRVs 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 (21 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.

The air loaded, pilotless version of the Type 92B is the Type 92P. The Type 92P is air loaded using a Type 67CFR airset, a Type 670 panel loader, or a PID Controller.

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.

✰ Extended Diaphragm Service

✰ Bellows Stem

Life—Two-ply construction and dual flex points

Guide—Pilot bellows reduces

increases cycle life compared to conventional designs. Stainless steel material ensures satisfactory operation at high steam temperatures.

sticking from scale buildup due to boiler carryover.

✰

✰ Resilient Seats—Valve seats are individually lapped for tight shut-off. 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.

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.

W1322-3A

✰ Standard ANSI Face-to-Face—NPT, 125 FF, 150 RF, 250 RF, and 300 RF end connections are ANSI standard face-to-face dimensions.

The Type 92B main valve is also available with BSPT and PN 16/25/40 end connections.

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✰ Double Post Stem Guide—Top and bottom seat guides with Inconel™ bushings eliminate lateral plug instability and premature stem wear.

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

DIAPHRAGM 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

REDUCING VALVE SPRING

VALVE STEM GUIDE

PILOT VALVE SPRING

BOTTOM FLANGE

Figure 2. Typical Type 92B Construction

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Bulletin 71.2:92B Specifications Available Configurations Type 92B: Pilot-operated globe-style pressure reducing valve with post guiding and flow to close valve plug action Type 92P: Pilotless version of the Type 92B for remote pressure loading 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) Type 92B: 20 psig (1,4 bar) with stainless steel spring; 10 psig (0,7 bar) with Inconel(2) spring Type 92P: 5 psig (0,34 bar) Maximum Outlet (Casing) Pressure Cast Iron: 150 psig (10,3 bar) or body rating limits, whichever is lower Steel/Stainless steel: 300 psig (21 bar) or body rating limits, whichever is lower Type 92P Maximum Diaphragm Loading Pressure 150 psig (10,3 bar) 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 1 and 1-1/2-inch bodies: 1/4-inch NPT 2-inch body: 3/8-inch NPT 3 and 4-inch bodies: 1/2-inch NPT Approximate Weight See table 7

Construction Materials Main Valve Body, Bottom Flange, Diaphragm Case, and Diaphragm Plate: Cast iron, WCC Steel, or CF8M Stainless steel Bottom Flange Gasket: Cast iron: Composition; Steel/Stainless steel: Grafoil(3) Upper Diaphragm Plate (1-1/2 to 4-inch Type 92P): Steel or Stainless steel 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: 17-4PH Stainless steel (Type 92B only) or Inconel Bleed Orifice Fitting (Type 92B only): 416 Stainless steel Diaphragm Plate Plug (Type 92P only): 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 Type 92B Pilot 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: Grafoil 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.

2. Trademark of International Nickel Co. 3. Trademark of Union Carbide.

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

Table 2. Outlet Pressure Ranges

END CONNECTION STYLE

PILOT TYPE

BODY SIZE, INCHES (DN)

Cast Iron Body

1 (25)

NPT, BSPT

1-1/2 (40) and 2 (50)

NPT, BSPT, Class 125FF, and Class 250RF

NPT, BSPT, Class 150RF, Class 300RF, and PN 16/25/40

3 (80) and 4 (100)

Class 125FF and Class 250RF

Class 150RF, Class 300RF, PN 16, and PN 25/40

Steel and Stainless Steel Body

Low Pressure High Pressure High Temperature

OUTLET PRESSURE, PSIG (bar) 2 to 6 (0,14 to 0,41) 5 to 15 (0,34 to 1,0) 13 to 25 (0,90 to 1,7) 15 to 30 (1,0 to 2,1) 25 to 75 (1,7 to 5,2) 70 to 150 (4,8 to 10,3) 15 to 100 (1,0 to 6,9) 80 to 250 (5,5 to 17,2)

PART NUMBER 1E395627022 1D745527142 1E395727192 1E395627022 1D745527142 1E395727192 14B9943X012 14B9942X012

COLOR CODE Yellow Green Red Yellow Green Red Unpainted Unpainted

Table 3. Maximum Inlet Pressures and Temperatures BODY MATERIAL Cast Iron

Steel

Stainless Steel

END CONNECTION

MAXIMUM INLET PRESSURE

MAXIMUM TEMPERATURE

NPT, BSPT

250 psig (17,2 bar)

406°F (208°C)

125FF

125 psig (8,6 bar)

353°F (178°C)

250RF

250 psig (17,2 bar)

406°F (208°C)

NPT, BSPT

300 psig (20,7 bar)

450°F (232°C)

150RF

185 psig (12,8 bar)

450°F (232°C)

300RF

300 psig (20,7 bar)

600°F (316°C)( 1 )

PN 16/25/40 (1, 1-1/2, and 2-inch bodies)

300 psig (20,7 bar)

600°F (316°C)( 1 )

PN 16 (3 and 4-inch bodies)

185 psig (12,8 bar)

450°F (232°C)

PN 25/40 (3 and 4-inch bodies)

300 psig (20,7 bar)

600°F (316°C)( 1 )

NPT, BSPT

300 psig (20,7 bar)

450°F (232°C)

150RF

175 psig (12,1 bar)

450°F (232°C)

300RF

300 psig (20,7 bar)

600°F (316°C)( 1 )

PN 16/25/40 (1, 1-1/2, and 2-inch bodies)

300 psig (20,7 bar)

600°F (316°C)( 1 )

PN 16 (3 and 4-inch bodies)

175 psig (12,1 bar)

450°F (232°C)

PN 25/40 (3 and 4-inch bodies)

300 psig (20,7 bar)

600°F (316°C)( 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 NUMBER

6492HM

6492HTM

SPRING RANGE, PSIG (bar)

SPRING COLOR

MINIMUM PRESSURE AT WHICH MONITORING PILOT CAN BE SET, PSIG (bar)

10 to 30 (0,69 to 2,07)

Yellow

10 (0,69) over normal downstream pressure

25 to 75 (1,72 to 5,17)

Green

10 (0,69) over normal downstream pressure

70 to 150 (4,83 to 10,3)

Red

15 (1,03) over normal downstream pressure

15 to 100 (1,03 to 6,9)

Unpainted

10 (0,69) over normal downstream pressure

80 to 250 (5,52 to 17,2)

Unpainted

25 (1,72) over normal downstream pressure

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Bulletin 71.2:92B

E0672

INLET PRESSURE LOADING PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE

Figure 3. Type 92B Operational Schematic

Principle of Operation Type 92B (figure 3) Compression of the pilot spring pushes diaphragm (B) down and holds pilot valve plug (C) open. Outlet pressure is changed by varying the amount of pilot spring (A) compression.

When steam enters the inlet of the valve, it also enters the pilot supply line (F) and flows through the open pilot valve to the top of the main diaphragm (H). The force created by this steam pressure on the diaphragm overcomes the force of the main valve spring (E) opening the valve plug (D) and allowing steam to flow downstream. Downstream pressure registers under the main diaphragm through the control line (J) and tends to balance the diaphragm. Steam from the downstream system also registers under the pilot diaphragm through line (L). Pressure forces the diaphragm (B) upward, permitting the pilot valve plug to move toward the closed position. Flow of steam to the top of the main diaphragm

6

is thereby reduced and the pressure on main diaphragm drops due to the bleed through the orifice (N). The main valve moves toward the closed position, allowing only enough steam flow to satisfy downstream requirements.

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

Bulletin 71.2:92B LOADING RELAY

A7076

UPSTREAM PRESSURE LOADING PRESSURE DOWNSTREAM PRESSURE

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 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.

Type 92P (figure 4) When operation begins, a constant pressure is loaded on diaphragm (H). The diaphragm force opposes spring (E) and tends to open valve (D), allowing steam to flow downstream. The downstream pressure registers under the main diaphragm through control line (J) and tends to balance the diaphragm force. As the downstream pressure builds up, the pressure on the bottom side of the diaphragm approaches the pressure on the top, tending to close the valve.

When steam demand increases, the downstream pressure decreases. The pressure on the bottom side

LOADING PRESSURE DROP ACROSS THE DIAPHRAGM - PSI

Figure 4. Type 92P Operational Schematic - Use a Fisher Type 670 manual loading station or other suitable air regulator to control loading pressure to the Type 92P.

PRESSURE DROP ACROSS THE VALVE - PSI

Figure 5. Type 92P Differential Pressure Ratios

of the main diaphragm decreases, allowing the valve to open farther. If the steam demand decreases, the downstream pressure increases and pressure is increased on the bottom of the main diaphragm, overcoming the balance and causing the valve to move toward the closed position.

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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 LOADING PRESSURE OUTLET PRESSURE INTERMEDIATE PRESSURE ATMOSPHERIC PRESSURE

Figure 6. Safety Override System Schematic

Type 92B Safety Override System (figure 6) 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

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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 sentinal 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.

Bulletin 71.2:92B BLOCK VALVE

INITIAL PRESSURE GAUGE

REDUCED PRESSURE GAUGE SENSING LINE

BLOCK VALVE

BLOCK VALVE STRAINER TRAP

TYPE 92B

E0706

TYPE 92B SINGLE-STAGE INSTALLATION REDUCED PRESSURE GAUGE SENSING LINE

BLOCK VALVE

BLOCK VALVE

BLOCK VALVE STRAINER

INITIAL PRESSURE GAUGE

TYPE 92B

REDUCED PRESSURE GAUGE SENSING LINE

BLOCK VALVE

BLOCK VALVE STRAINER

E0707

TRAP

TYPE 92B

TRAP

TYPE 92B SINGLE-STAGE PARALLEL INSTALLATION BLOCK VALVE

BLOCK VALVE

INITIAL PRESSURE GAUGE

INTERMEDIATE PRESSURE GAUGE SENSING LINE

BLOCK VALVE

REDUCED PRESSURE GAUGE SENSING LINE

BLOCK VALVE STRAINER TRAP

E0708

PRIMARY TYPE 92B

BLOCK VALVE SECONDARY TYPE 92B TRAP

TYPE 92B TWO-STAGE INSTALLATION

Figure 7. Type 92B Typical Installations

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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 8. Safety Override System Installation

TYPE 4196 CONTROLLER

BLEED FITTING

3 - 15 PSIG (0,21 - 1,0 bar)

100 PSIG (6,9 bar) AIR

100 PSIG (6,9 bar) AIR

AMPLIFYING RELAY

TYPE 67CFR

WELL

TYPE 92P

HEAT EXCHANGER

HOT WATER COLD WATER

TRAP

Figure 9. Pneumatically Operated Heat Exchanger Installation With Temperature Control The Fisher Type 92P air-loaded control valve receives air-loading pressure from a Type 4196 Wizard Controller and Amplifying Relay.

This positions the Type 92P to maintain steam flow necessary to control outlet temperature of the heat exchanger. Packing friction is eliminated improving response time. Packing leaks are eliminated reducing maintenance.

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Bulletin 71.2:92B 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.

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 Fisher Regulator Division 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 Fisher Sales Representative or 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 Fisher Regulator Division recommends using either the Fisher steam sizing equation or IEC sizing procedure.

Example: RELIEF VALVE SET: 15 PSIG (1,0 bar) FULL OPEN: 25 PSIG (1,7 bar)

100 PSIG / 338°F (6,9 bar / 170°C)

10 PSIG (0,69 bar) RELIEF VALVE

2-INCH TYPE 92B

Determine the maximum valve flow capacity at wideopen failure.  3417  ∆P    CsP1   SIN  DEG Qmax(lb/hr) =    C1  P1   1 + 0.00065 Tsh 

where: Q = P1 = Cs = C1 = Tsh = ∆P =

Steam flow rate, lb/hr Absolute inlet pressure, psia (P1 gauge + 14.7) Wide-open gas sizing coefficient, see table 4 Flow coefficient, see table 5 Degrees of steam superheat at inlet, °F Pressure drop across regulator, psia

Example Calculation:  3417  75   74 x 114.7  DEG  SIN   Qmax(lb/hr) =   35  114.7   1 + 0.00065 x 0 

Qmax = 8,330 lb/hr where: Cs = 74 ∆P = 75 psia C1 = 35 Tsh = 0 °F P 1 = 114.7 psia

Table 5. Main Valve Coefficients FLOW COEFFICIENTS BODY SIZE, INCHES (DN) 1 (25) 1-1/2 (40) 2 (50) 3 (80) 4 (100)

Regulating Coefficients

IEC SIZING COEFFICIENTS

Wide-Open Coefficients

Cg

Cs

Cv

Cg

Cs

Cv

330 560 960 2000 2700

16.5 28 48 100 135

9.4 16 27.4 57.1 77.1

480 921 1481 3042 4515

24 46 74 152 225

13.7 26.3 42.3 86.9 129

C1

Km

35 35 35 35 35

0.80 0.80 0.80 0.80 0.80

FL

XT

FD

0.89 0.89 0.89 0.89 0.89

0.78 0.78 0.78 0.78 0.78

0.24 0.25 0.28 0.26 0.20

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Bulletin 71.2:92B Table 6. Capacities(1) INLET PRESSURE, PSIG (bar)

OUTLET PRESSURE, PSIG (bar)

25 (1,7)

5 (0,34) 10 (0,69) 15 (1,0)

50 (3,4)

5 10 20 30 40

75 (5,2)

100 (6,9)

125 (8,6)

150 (10,3)

200 (13,8)

(0,34) (0,69) (1,38) (2,07) (2,76)

1080 1080 1080 928 710

(490) (490) (490) (421) (322)

1500 (680) 1500 (680) 1500 (680)

30 40 50 60

1470 1380 1240 1020

(2,07) (2,76) (3,45) (4,14)

(667) (626) (562) (463)

1-1/2-Inch (DN 40) Body Size

2-Inch (DN 50) Body Size

1060 (481) 1080 (490) 935 (424)

2060 (934) 2080 (943) 1860 (844)

3800 (1723) 3850 (1746) 3260 (1478)

4940 (2240) 5000 (2268) 4520 (2050)

3300 3390 3290 2940 2590

6500 6650 6500 5740 4980

8960 9110 8810 7730 6650

1830 1890 1860 1760 1660

(830) (857) (844) (798) (753)

(1497) (1537) (1492) (1333) (1175)

3-Inch (DN 80) Body Size

(2948) (3016) (2948) (2603) (2258)

4-Inch (DN 100) Body Size

(4063) (4131) (3995) (3506) (3016)

2510 (1138) 2620 (1188) 2720 (1234)

4610 (2091) 4700 (2131) 4770 (2163)

9080 (4118) 9180 (4163) 9290 (4213)

10,900 (4943) 11,200 (5079) 11,300 (5125)

2680 2640 2380 2120

4680 4590 4370 4160

8880 8470 7680 6900

10,800 10,200 9240 8280

(1215) (1197) (1079) (961)

(2122) (2082) (1982) (1887)

(4027) (3841) (3483) (3129)

(4898) (4626) (4190) (3755)

5 (0,34) 10 (0,69) 20 (1,38)

1900 (862) 1920 (862) 1920 (871)

3400 (1542) 3440 (1560) 3460 (1569)

5710 (2589) 5870 (2662) 5900 (2676)

11,500 (5215) 11,700 (5306) 11,800 (5381)

16,100 (7301) 16,400 (7437) 16,400 (7437)

40 (2,76) 60 (4,14) 80 (5,52)

1920 (871) 1700 (771) 1330 (603)

3500 (1587) 3330 (1510) 2860 (1297)

5930 (2689) 5650 (2562) 4960 (2249)

11,800 (5351) 11,000 (4989) 9670 (4385)

16,500 (7483) 15,200 (6893) 13,000 (5896)

5 (0,34) 10 (0,69) 20 (1,38)

2310 (1048) 2340 (1061) 2340 (1061)

4140 (1877) 4170 (1891) 4230 (1918)

6950 (3152) 7010 (3179) 7080 (3211)

13,900 (6304) 14,100 (6394) 14,100 (6394)

19,600 (8889) 19,800 (8979) 19,800 (8979)

2340 2340 2100 1630

4280 4400 4100 3250

7080 7250 6750 5400

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

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

40 60 80 100

(2,76) (4,14) (5,52) (6,9)

(1061) (1061) (952) (739)

(1941) (1995) (1859) (1474)

(3211) (3288) (3061) (2449)

(6440) (6530) (5125) (5125)

(8979) (8979) (8390) (7075)

20 (1,38) 40 (2,76) 60 (4,14)

2770 (1256) 2770 (1256) 2770 (1256)

5000 (2268) 5070 (2299) 5110 (2317)

8220 (3728) 8260 (3746) 8300 (3764)

16,700 (7573) 16,700 (7573) 16,800 (7619)

23,600 (10 703) 23,700 (10 748) 23,800 (10 793)

80 (5,52) 100 (6,9) 120 (8,27)

2770 (1256) 2360 (1070) 1950 (884)

4980 (2258) 4600 (2086) 4090 (1855)

8130 (3687) 7740 (3510) 7070 (3206)

15,900 (7211) 15,200 (6893) 13,700 (6213)

23,500 (10 657) 21,700 (9841) 18,600 (8435)

20 (1,38) 40 (2,76) 60 (4,14)

3610 (1637) 3610 (1637) 3610 (1637)

6480 (2939) 6500 (2948) 6520 (2957)

10,700 (4852) 10,800 (4898) 10,900 (4943)

21,900 (9932) 21,900 (9932) 22,000 (9977)

29,500 (13 378) 31,000 (14 059) 31,200 (14 149)

3610 3610 3280 2790

6550 6250 6300 6070

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

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

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

80 100 120 150

(5,52) (6,9) (8,27) (10,3)

80 100 120 150

(5,52) (6,9) (8,27) (10,3)

20 (1,38) 40 (2,76) 60 (4,14)

300 (21)

660 (299) 600 (272) 525 (238)

5 (0,34) 10 (0,69) 20 (1,38)

20 (1,38) 40 (2,76) 60 (4,14) 250 (17,2)

CAPACITIES IN POUNDS PER HOUR (kg/h) OF SATURATED STEAM (based on 10 percent droop) 1-Inch (DN 25) Body Size

80 100 120 150

(5,52) (6,9) (8,27) (10,3)

175 (12,1) 200 (14,1) 250 (17,2)

(1637) (1637) (1487) (1265)

(2970) (2834) (2857) (2753)

(4989) (4852) (4762) (4626)

(10 204) (9841) (9387) (8934)

(14 195) (13 922) (13 469) (12 834)

4460 (2023) 4460 (2023) 4460 (2023)

7850 (3560) 7920 (3592) 8100 (3633)

13,000 (5896) 13,200 (5986) 13,300 (6032)

27,200 (12 335) 27,300 (12 381) 27,300 (12 381)

37,300 (16 916) 37,800 (17 142) 38,500 (17 460)

4460 4460 4160 4050

8130 8150 7860 6780

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

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

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

(2023) (2023) (1887) (1837)

(3687) (3696) (3565) (3075)

(6077) (6077) (5759) (5215)

(12 426) (12 471) (11 927) (10 431)

(17 550) (17 596) (16 780) (14 059)

5190 (2354) 5190 (2354) 5180 (2350)

8810 (3996) 8810 (3996) 8790 (3987)

15,100 (6849) 15,100 (6849) 15,000 (6804)

31,400 (14 243) 31,400 (14 243) 31,400 (14 243)

42,400 (19 233) 42,400 (19 233) 42,300 (19 187)

5150 5110 5040 4900

8740 8670 8550 8310

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

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

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

(2336) (2318) (2286) (2223)

4730 (2146) 4510 (2046) 3830 (1737)

(3964) (3933) (3878) (3769)

8030 (3642) 7650 (3470) 6510 (2953)

(6759) (6713) (6623) (6441)

13,700 (6214) 13,100 (5942) 11,100 (5035)

(14 152) (14 016) (13 835) (13 472)

28,600 (12 973) 27,300 (12 383) 23,200 (10 524)

(19 097) (18 960) (18 688) (18 144)

38,700 (17 554) 36,800 (16 692) 31,400 (14 243)

1. Printed capacities are for the Type 92B and 92P with electropneumatic loading system. If using a Type 92P with manually controlled air loading system, multiply the printed values by 0.75 for outlet settings of 10 psig (0,69 bar) or greater and by 0.5 for 5 psig (0,34 bar) outlet settings.

12

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

F - DOWNSTREAM CONTROL LINE CONNECTION, NPT

C

E

C

E N

N

G

G

L

1/2 A

B

A

L

A FLANGED

NPT

DIMENSIONS, INCHES (mm) BODY SIZE, INCHES NPT and (DN) BSPT

125FF(1)

250RF(1)

and 150RF

and 300RF

PN 16

PN 25/40

1 (25) 6.50 (165) 1-1/2 (80) 8.00 (203) 2 (50) 9.25 (235) 3 (80) --4 (100) ---

7.25 (184) 8.75 (222) 10.00 (254) 11.75 (298) 13.88 (353)

7.75 (197) 9.25 (235) 10.50 (267) 12.50 (317) 14.50 (368)

7.75 (197) 9.06 (230) 10.25 (260) 11.81 (300) 13.56 (344)

7.75 (197) 9.06 (230) 10.25 (260) 12.21 (310) 13.88 (353)

A

L C

E

F NPT

9.25 (235) 10.38 (264) 11.88 (302) 13.88 (353) 14.88 (378)

6.81 (173) 7.00 (178) 7.75 (197) 8.94 (227) 10.12 (257)

1/4 1/4 3/8 1/2 1/2

G

3.25 (82,6) 3.81 (96,8) 4.12 (105) 5.19 (132) 6.44 (164)

HighLowPressure/ Pressure High Temp Pilot Pilot 2.81 (71,4) 10.25 (260) 8.38 (213) 3.94 (100)(2) 10.69 (272) 8.81 (224) 3.91 (99,3) 11.25 (286) 9.38 (238) 5.50 (140) 12.12 (308) 10.25 (260) 6.38 (162) 13.12 (333) 11.25 (286) N

1. Cast iron flanges are not available for the 1-inch (DN 25) body.

2. 3.44 inches (87,4 mm) NPT bodies

Figure 10. Dimensions

Table 7. Weights BODY MATERIAL

END CONNECTION STYLE NPT, BSPT

Cast Iron

125FF

250RF

NPT, BSPT

150RF, PN 16 Steel or Stainless Steel

300RF, PN 16/25/40, PN 25/40

BODY SIZE, INCHES (DN) 1 (25) 1-1/2 (40) 2 (50) 1-1/2 (40) 2 (50) 3 (80) 4 (100) 1-1/2 (40) 2 (50) 3 (80) 4 (100) 1 (25) 1-1/2 (40) 2 (50) 1 (25) 1-1/2 (40) 2 (50) 3 (80) 4 (100) 1 (25) 1-1/2 (40) 2 (50) 3 (80) 4 (100)

APPROXIMATE WEIGHT, POUNDS (kg) WITH HIGH-PRESSURE PILOT( 1 ) 55 73 105 77 110 175 243 83 115 190 263 65 89 122 77 95 132 220 285 82 102 137 225 305

(25) (33) (48) (35) (50) (79) (110) (38) (52) (86) (119) (29) (40) (55) (35) (43) (60) (100) (129) (37) (46) (62) (102) (138)

1. Add 5 pounds (2,3 kg) for low-pressure pilot.

13

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.

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.

Positioning and Mounting

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.

The Types 92B and 92P regulators are intended to be installed with their diaphragm cases above the pipeline

Note that the Type 92B pilot may be installed on either side of the body.

Type 92P Ordering Guide Inlet Steam Conditions (Select One)

< < < < < <

125 175 185 250 300 300

psig psig psig psig psig psig

(8,6 bar)/353°F (178°C) (12,1 bar)/450°F (232°C) (12,8 bar)/450°F (232°C) (17,2 bar)/406°F (208°C) (20,7 bar)/450°F (232°C) (20,7 bar)/600°F (316°C)

Main Valve Body Size and Material (Select One) Cast Iron

1-inch (DN 25) 1-1/2-inch (DN 40) 2-inch (DN 50) 3-inch (DN 80) 4-inch (DN 100)

Steel

1-inch (DN 25) 1-1/2-inch (DN 40) 2-inch (DN 50) 3-inch (DN 80) 4-inch (DN 100)

Stainless Steel

1-inch (DN 25) 1-1/2-inch (DN 40) 2-inch (DN 50) 3-inch (DN 80) 4-inch (DN 100)

Main Valve Spring (Select One) 17-4 Stainless steel (standard)*** Inconel (optional)**

14

End Connection Style (Select One) Cast Iron

NPT (1, 1-1/2, and 2-inch bodies only) BSPT (1, 1-1/2, and 2-inch bodies only) 125FF Flanged (1-1/2, 2, 3, and 4-inch bodies only) 250RF Flanged (1-1/2, 2, 3, and 4-inch bodies only)

Steel

NPT (1, 1-1/2, and 2-inch bodies only) BSPT (1, 1-1/2, and 2-inch bodies only) 150RF Flanged 300RF Flanged PN 16/25/40 (1, 1-1/2, and 2-inch bodies only) PN 16 (3 and 4-inch bodies only) PN 25/40 (3 and 4-inch bodies only)

Stainless Steel

NPT Screwed (1, 1-1/2, and 2-inch bodies only) BSPT (1, 1-1/2, and 2-inch bodies only) 150RF Flanged 300RF Flanged PN 16/25/40 (1, 1-1/2, and 2-inch bodies only) PN 16 (3 and 4-inch bodies only) PN 25/40 (3 and 4-inch bodies only)

Pressure Loading Supply (Optional) Yes (Type 670 panel loader) Main Valve Replacement Parts Kit (Optional) Yes, send one main valve replacement parts kit to match this order.

Bulletin 71.2:92B Type 92B Ordering Guide

End Connection Style (continued) Stainless Steel

Inlet Steam Conditions (Select One)

< < < < < <

125 175 185 250 300 300

psig psig psig psig psig psig

(8,6 bar)/353°F (178°C) (12,1 bar)/450°F (232°C) (12,8 bar)/450°F (232°C) (17,2 bar)/406°F (208°C) (20,7 bar)/450°F (232°C) (20,7 bar)/600°F (316°C)

Main Valve Body Size and Material (Select One) Cast Iron

1-inch (DN 25) 1-1/2-inch (DN 40) 2-inch (DN 50) 3-inch (DN 80) 4-inch (DN 100)

Steel

1-inch (DN 25) 1-1/2-inch (DN 40) 2-inch (DN 50) 3-inch (DN 80) 4-inch (DN 100)

Stainless Steel

1-inch (DN 25) 1-1/2-inch (DN 40) 2-inch (DN 50) 3-inch (DN 80) 4-inch (DN 100)

End Connection Style (Select One) Cast Iron

NPT Screwed (1, 1-1/2, and 2-inch bodies only) BSPT (1, 1-1/2, and 2-inch bodies only) 150RF Flanged 300RF Flanged PN 16/25/40 (1, 1-1/2, and 2-inch bodies only) PN 16 (3 and 4-inch bodies only) PN 25/40 (3 and 4-inch bodies only)

Main Valve Spring (Select One) 17-4 Stainless steel (standard)*** Inconel (optional)** Pilot Material (Select One) Cast Iron Steel Stainless Steel Pilot Type and Spring Range (Select One) High Pressure 15 to 30 psig (1,0 to 2,1 bar) 25 to 27 psig (1,7 to 5,2 bar) 70 to 150 psig (4,8 to 10,3 bar) Low Pressure 2 to 6 psig (0,14 to 0,41 bar) 5 to 15 psig (0,34 to 1,0 bar) 13 to 25 psig (0,90 to 1,7 bar) High Temperature 15 to 100 psig (1,0 to 6,9 bar) 80 to 250 psig (5,5 to 17,2 bar)

- continued -

NPT (1, 1-1/2, and 2-inch bodies only) BSPT (1, 1-1/2, and 2-inch bodies only) 125FF Flanged (1-1/2, 2, 3, and 4-inch bodies only) 250RF Flanged (1-1/2, 2, 3, and 4-inch bodies only)

Steel

NPT (1, 1-1/2, and 2-inch bodies only) BSPT (1, 1-1/2, and 2-inch bodies only) 150RF Flanged 300RF Flanged PN 16/25/40 (1, 1-1/2, and 2-inch bodies only) PN 16 (3 and 4-inch bodies only) PN 25/40 (3 and 4-inch bodies only)

Steam Specification Worksheet Application: Tag Number: Valve Type:

Direct-Operated Pilot-Operated Pressure Loaded Differential Body Material: Steel Iron Stainless Steel Inlet/Outlet End Connection Style: NPT 125FF Flange 150RF Flange 250RF Flange 300RF Flange BSPT PN 16/25/40 Inlet/Outlet Pipe Size: Steam Conditions:

Inches (mm) Maximum

Normal

Minimum

Inle t Pre ssure (psig/bar) Inle t Te mpe rature (°F/C)

*** ** *

Standard - Readily Available for Shipment Non-Standard - Allow Additional Time for Shipment Special Order, Constructed from Non-Stocked Parts.

Consult Your Fisher Sales Representative for Availability.

Outle t Pre ssure (psig/bar) Flow (pounds/h or kg/h)

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

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

15

Bulletin 71.2:92B Type 92B Ordering Guide (continued) Pilot Mounting Position (Select One) Facing inlet side of main valve with diaphragm case up, pilot is mounted: On left side with pilot adjusting screw pointed up On right side with pilot adjusting screw pointed up Options (Select One) Standard Adjusting Screw Sealed Adjusting Screw Handwheel Safety Override System (Optional) Type 6492HM Pilot Spring Range 10 to 30 psig (0,69 to 2,07 bar) 25 to 75 psig (1,72 to 5,17 bar) 70 to 150 psig (4,83 to 10,3 bar) Type 6492HTM Pilot Spring Range 15 to 100 psig (1,03 to 6,9 bar) 80 to 250 psig (5,52 to 17,2 bar) Main Valve Replacement Parts Kit (Optional) Yes, send one main valve replacement parts kit to match this order.

Replacement Pilot (Optional) Yes, send one replacement pilot to match this order.

Pilot Replacement Parts Kit (Optional) Yes, send one pilot replacement parts kit to match this order.

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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.

Fisher does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Fisher product remains solely with the purchaser.

For information, contact Fisher: Marshalltown, Iowa 50158 USA McKinney, Texas 75070 USA 28320 Gallardon, France 40013 Castel Maggiore (BO), Italy Sao Paulo 05424 Brazil Singapore 128461 ŠFisher Controls International, Inc., 1980, 2002; All Rights Reserved

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