Download pdf - Instruction Manual, Fisher Type 92B & 92P PRV

Types 92B and 92P

D100

703X

012

Instruction ManualForm 1329

0ctober 2002

www.FISHERregulators.com

IntroductionScope of ManualThis manual provides instructions for installation,startup, maintenance, and a parts list for the Types 92Band 92P valves. Instructions and parts lists for otherequipment used with these valves are found in separatemanuals. The Type 92B is also available with a Type6492HM or 6492HTM safety override pilot.

Product DescriptionThe Type 92B Pressure Reducing Valve (PRV) is thestandard steam valve for industry. It can withstand dirtyoperating environments while providing accurate andstable pressure control. The Type 92B is applied as amain pressure reducing valve in industrial processheating applications such as heat exchangers, evapora-tors, digesters, and reactors. Commercial applicationsinclude PRVs for meter runs found in district energysystems, hot water heat exchangers, absorption chillers,and boiler deaerator tanks.

The air loaded, pilotless version of the Type 92B is theType 92P. The Type 92P is an air-loaded, pressurereducing valve which is pressure balanced. TheType 92P is air loaded using a Type 67CFR airset, aType 670 panel loader, or a PID Controller.

A Type 6492HM safety override pilot is available for theType 92B. The Type 92B pilot is used in a seriesinstallation with the Type 6492HM safety override pilotinstalled on the upstream valve. The Type 6492HMsafety override pilot senses pressure downstream ofthe second valve, and prevents pressure from risingabove safe operating pressure in the event the down-stream valve fails. This system is approved by ASMEB31.1-1989, 122.14.2.A, and can replace an ASMEsafety valve when vent piping is not practical andupstream steam pressure does not exceed 400 psig(27,6 bar). Local codes and standards may requireapproval by an appropriate authority prior to installation.

Type 92B Pressure Reducing Valve (PRV) andType 92P Air-Loaded Pressure Reducing Valve

The Type 92B safety override system doesnot provide positive shutoff in dead endservice. It is intended for large distribu-tion systems where steam leakage willcondense before steam pressure builds-up. Downstream piping and componentsmust be rated for maximum upstreamsteam pressure for dead end service.Failure to do so could cause personalinjury or death.

SpecificationsSpecifications are given for the Types 92B and 92Pvalves on page 2. Specifications for a given valve as itoriginally comes from the factory are stamped on thenameplate.

Figure 1. Type 92B Pressure Reducing Valve

W8264

Types 92B and 92P

2

Available ConfigurationsType 92B: Pilot-operated globe-style pressurereducing valve with post guiding and flow to closevalve plug actionType 92P: Pilotless version of the Type 92B forremote pressure loading

Body Sizes and End Connection StylesSee table 1

Body Ratings and Maximum Inlet Pressures(1)

See table 3Maximum Outlet (Casing) Pressure

Cast Iron: 150 psig (10,3 bar) or body rating limits,whichever is lowerSteel/Stainless steel: 300 psig (21 bar) or bodyrating limits, whichever is lower

Outlet Pressure Ranges(1)

See table 2

1. The pressure/temperature limits in this instruction manual or any applicable standard limitation should not be exceeded.2. Trademark of International Nickel Co.

SpecificationsMinimum Differential Pressure Required for FullStroke(1)

Type 92B: 20 psig (1,4 bar) with stainless steelspring; 10 psig (0,69 bar) with Inconel(2) springType 92P: 5 psig (0,34 bar)

Type 92P Maximum Diaphragm Loading Pressure150 psig (10,3 bar)

Pressure RegistrationExternal

Maximum Temperature Capabilities(1)

See table 3

Downstream Control Line Connections1 and 1-1/2-inch bodies: 1/4-inch NPT2-inch body: 3/8-inch NPT3 and 4-inch bodies: 1/2-inch NPT

EPYTTOLIP ,ERUSSERPTELTUO(GISP rab )

TRAPREBMUN

ROLOCEDOC

woLerusserP

6ot251ot552ot31

)14,0ot41,0()0,1ot43,0()7,1ot09,0(

220726593E1241725547D1291727593E1

wolleYneerG

deR

hgiHerusserP

03ot5157ot52051ot07

)1,2ot0,1()2,5ot7,1()3,01ot8,4(

220726593E1241725547D1291727593E1

wolleYneerG

deRhgiH

erutarepmeT001ot51052ot08

)9,6ot0,1()2,71ot5,5(

210X3499B41210X2499B41

detniapnUdetniapnU

Table 2. Outlet Pressure Ranges

,EZISYDOB)ND(SEHCNI

ELYTSNOITCENNOCDNE

ydoBnorItsaC sselniatSdnaleetSydoBleetS

)52(1 TPSB,TPN ,TPSB,TPN,FR051ssalC,FR003ssalC04/52/61NPdna

)05(2dna)04(2/1-1,TPSB,TPN

dna,FF521ssalCFR052ssalC

)001(4dna)08(3 dnaFF521ssalCFR052ssalC

,FR003ssalC,FR051ssalC04/52NPdna,61NP

Table 1. Body Sizes and End Connection Styles

LAIRETAMYDOB NOITCENNOCDNE ERUSSERPTELNIMUMIXAM ERUTAREPMETMUMIXAM

norItsaCTPSB,TPN gisp052 )rab2,71( F°604 )C°802(

FF521 gisp521 )rab6,8( F°353 )C°871(FR052 gisp052 )rab2,71( F°604 )C°802(

leetS

TPSB,TPN gisp003 )rab7,02( F°054 )C°232(FR051 gisp581 )rab8,21( F°054 )C°232(FR003 gisp003 )rab7,02( F°006 )C°613( )1(

)seidobhcni-2dna,2/1-1,1(04/52/61NP gisp003 )rab7,02( F°006 )C°613( )1(

)seidobhcni-4dna3(61NP gisp581 )rab8,21( F°054 )C°232()seidobhcni-4dna3(04/52NP gisp003 )rab7,02( F°006 )C°613( )1(

leetSsselniatS

TPSB,TPN gisp003 )rab7,02( F°054 )C°232(FR051 gisp571 )rab1,21( F°054 )C°232(FR003 gisp003 )rab7,02( F°006 )C°613( )1(

)seidobhcni-2dna,2/1-1,1(04/52/61NP gisp003 )rab7,02( F°006 )C°613( )1(

)seidobhcni-4dna3(61NP gisp571 )rab1,21( F°054 )C°232()seidobhcni-4dna3(04/52NP gisp003 )rab7,02( F°006 )C°613( )1(

.noitpodlewlaeshtiw)C°613(F°006,gnirtaesdradnatshtiw)C°232(F°054.1

Table 3. Maximum Inlet Pressures and Temperatures

Types 92B and 92P

3

Principle Of OperationType 92BRefer to the operational schematic in figure 2. Com-pression of the pilot spring (A) pushes the diaphragm(B) down and holds the pilot valve plug (C) open. Outletpressure is changed by varying the amount of pilotspring compression.

When steam enters the inlet of the valve, it also entersthe pilot supply line (F) and flows through the open pilotvalve to the top of the main diaphragm (H). The forcecreated by this steam pressure on the diaphragmovercomes the force of the main valve spring (E)opening the valve plug (D) and allowing steam to flowdownstream. Downstream pressure registers under themain diaphragm through the control line (J) and tends tobalance the diaphragm. Steam from the downstreamsystem also registers under the pilot diaphragm throughline (L). Pressure forces the diaphragm (B) upward,permitting the pilot valve plug to move toward the closedposition. Flow of steam to the top of the main diaphragmis thereby reduced and the pressure on main diaphragmdrops due to the bleed through the orifice (N). The mainvalve moves toward the closed position, allowing onlyenough steam flow to satisfy downstream requirements.

When steam demand increases, the downstreampressure 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 flowdownstream. Conversely, if the steam demand de-creases, the downstream pressure increases and thepilot reacts to decrease the pressure on top of the maindiaphragm. The main valve throttles toward the closedposition and the steam flow decreases. Thus, throughthe combination of pilot and main valve operation, controlof the downstream steam pressure is maintained.

A check valve is included in all Type 92B pilots to limitdifferential pressure on the main valve diaphragm. Inthe event of a large decrease in downstream pressure,the check valve opens to relieve diaphragm loadingpressure to the downstream system. The check valvecartridge assembly has a factory setting to limitdifferential pressure across the diaphragm to approxi-mately 40 psid (2,8 bar d). If diaphragm differentialpressure exceeds 40 psid (2,8 bar d), the check valveopens to relieve diaphragm loading pressure into thedownstream system, thereby preventing a high differen-tial across the diaphragm which might otherwise causediaphragm damage. The check valve closes andnormal operation resumes when the differential pressureacross the diaphragm is reduced to the proper level.

Type 92PRefer to the schematic illustration in figure 3. Whenoperation begins, a constant pressure is loaded ondiaphragm (H). The diaphragm force opposes spring (E)

Figure 2. Type 92B Operational Schematic

INLET PRESSURELOADING PRESSUREOUTLET PRESSUREATMOSPHERIC PRESSUREE0672_1

Types 92B and 92P

4

and tends to open valve (D), allowing steam to flowdownstream. The downstream pressure registers underthe main diaphragm through control line (J) and tends tobalance the diaphragm force. As the downstreampressure builds up, the pressure on the bottom side ofthe diaphragm approaches the pressure on the top,tending to close the valve.

When steam demand increases, the downstreampressure decreases. The pressure on the bottom sideof the main diaphragm decreases, allowing the valve toopen farther. If the steam demand decreases, thedownstream pressure increases and pressure increaseson the bottom of the main diaphragm, overcoming thebalance and causing the valve to move toward theclosed position.

Type 6492HM Safety Override SystemRefer to the Schematic illustration in figure 4. Onceplaced in operation, the upstream Type 92B (B) pilotsenses the intermediate pressure between bothvalves, and the Type 6492HM (A) pilot senses down-stream pressure of the second valve. As demand forflow increases, intermediate pressure will fall causingthe Type 92B pilot to open. As the Type 92B pilotopens, loading pressure to the main valve increases,opening the main valve.

The Type 6492HM (A) safety override pilot remains openbecause its setpoint is above the setpoint of the down-stream valve. In the unlikely event that the downstreamvalve fails open, downstream pressure will rise above thedownstream valve�s setpoint. This pressure is sensed bythe Type 6492HM (A) safety override pilot. As down-stream pressure increases the Type 6492HM (A) safety

override pilot closes, reducing loading pressure to theupstream main valve, which positions the main valve tomaintain desired downstream override pressure.

In the event that the upstream valve fails, the down-stream valve will prevent downstream pressure fromrising above safe operating levels.

It is recommended to install some type of warningsystem, such as a sentinal relief valve, to warn theoperator that a valve has failed in the system. This willprevent prolonged operation with one valve, which couldcause valve trim wear and noise associated withoperation at high differential pressures.

Installation

Type 92B

Regulators should be installed, operatedand maintained in accordance with federal,state and local codes, rules and regula-tions, and Fisher instructions. If the regula-tor vents steam or a leak develops in thesystem, it indicates that service is required.

Failure to take the regulator out of serviceimmediately may create a hazardouscondition.

Call a serviceman in case of trouble. Onlya qualified person must install or servicethe regulator.

Figure 3. 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.

UPSTREAM PRESSURE

LOADING PRESSURE

DOWNSTREAM PRESSURE

A7076

LOADINGRELAY

Types 92B and 92P

5

Figure 4. Safety Override System Schematic

INLET PRESSURELOADING PRESSUREOUTLET PRESSUREINTERMEDIATE PRESSUREATMOSPHERIC PRESSURE

E0794

Be sure to install Type 92B pilot abovethe pipeline with the adjusting screwpointing up and the control line slopedat a downward pitch to the main line toensure proper condensate drainage.

The following points should be kept in mind wheninstalling this pressure reducing valve. See figure 5 fora schematic drawing of a typical installation.

1. Inspect the Type 92B for any shipment damage.Remove any foreign materials that may have collectedin the valve during shipment.

2. Blow down the pipeline as required.

3. Install a strainer ahead of the Type 92B to protectthe internal parts of the valve.

4. Install an upstream block valve ahead of theType 92B and a downstream block valve, if required, sothat the valve can be isolated and serviced. If continu-ous operation is necessary during maintenance orinspection, install bypass piping and valve around theType 92B.

5. This Type 92B is intended to be installed with thediaphragm case above the pipeline so that condensatewill not collect in the case.

TYPE 6492HM SAFETYOVERRIDE PILOT (A)

TYPE 92B PILOT (B) TYPE 92B PILOT (C)

TYPE 92B MAIN VALVE TYPE 92B MAIN VALVE

Table 4. Minimum Differential Pressures for Safety Override System

REBMUNEPYT (GISP,EGNARGNIRPS rab ) ROLOCGNIRPS GNIROTINOMHCIHWTAERUSSERPMUMINIM(GISP,TESEBNACTOLIP rab )

MH2946

03ot01 )70,2ot96,0( wolleY erusserpmaertsnwodlamronrevo)96,0(01

57ot52 )71,5ot27,1( neerG erusserpmaertsnwodlamronrevo)96,0(01

051ot07 )3,01ot38,4( deR erusserpmaertsnwodlamronrevo)30,1(51

MTH2946001ot51 )9,6ot30,1( detniapnU erusserpmaertsnwodlamronrevo)96,0(01

052ot08 )2,71ot25,5( detniapnU erusserpmaertsnwodlamronrevo)27,1(52

Types 92B and 92P

6

Figure 5. Type 92B Typical Installations

TYPE 92B SINGLE-STAGE INSTALLATION

TYPE 92B TWO-STAGE INSTALLATION

TYPE 92B SINGLE-STAGE PARALLEL INSTALLATION

BLOCKVALVE

BLOCK VALVE

TYPE 92B

INITIALPRESSUREGAUGE

STRAINER

REDUCEDPRESSUREGAUGE

SENSING LINE

TRAP

BLOCKVALVE

BLOCKVALVE

BLOCK VALVE

TYPE 92B


STRAINER


SENSING LINE

TRAP

BLOCKVALVE

TRAP

TYPE 92B

BLOCKVALVE

STRAINER


BLOCKVALVE

SENSING LINE

BLOCKVALVE

BLOCK VALVE

PRIMARYTYPE 92B


STRAINER


SENSING LINE

TRAP

BLOCKVALVE

BLOCK VALVE

BLOCKVALVE

INTERMEDIATEPRESSUREGAUGE

SENSING LINE

TRAP

SECONDARYTYPE 92B

E0708

E0706

E0707

Types 92B and 92P

7

Figure 6. Safety Override System Installation

TYPE 92B MAIN VALVE TYPE 92B MAIN VALVE

TYPE 6492HM SAFETYOVERRIDE PILOT

TYPE 92B PILOT

TYPE 92B PILOT

TYPE 6492HM SAFETYOVERRIDE PILOT

TYPE 92B PILOTTYPE 92B MAIN VALVE

TYPE 92B PILOT

TYPE 92B MAIN VALVE

Side View

Top View

6. Install the Type 92B in the pipeline so that the flowwill be in the direction indicated by the arrow cast onthe body. Follow normal piping procedures wheninstalling the screwed or flanged control valve.

7. Install the external control line as follows:

a) Connect one end of the control line to theType 92B body tapping. This NPT tapping is 1/4-inchfor 1 and 1-1/2-inch bodies, 3/8-inch for 2-inch body,and 1/2-inch for 3 and 4-inch bodies.

Note

The control line should be as large as thetapped hole in the Type 92B.

b) The other end of the control line is connected tothe downstream system. Place the tapped hole for thisconnection in a straight run of pipe 3 to 5 feet from thecontrol valve when the valve body is the same size asthe pipeline. If the valve body is smaller than thepipeline and requires swage nipples, place the tappedhole at a distance from the swage connection equal to10 times the pipe diameter.

c) Do not locate the control line tap in an elbow,swage, or other changes in configuration of the pipelinewhere turbulence or abnormal velocities may occur.

d) Do not locate the control line tap in a vessel(such as a deaerator) located immediately downstreamof the control valve. Locate the tap in the pipelineleading to the vessel.

e) Slope the control line away from the Type 92B sothat condensate can drain back into the pipeline.

f) Install a shutoff valve (not a needle valve) in thecontrol line.

g) Install a pressure gauge in the control line ornear the outlet of the Type 92B to aid in setting theoutlet pressure.

The maximum inlet and outlet pressuresfor which this Type 92B has been manu-factured should not be exceeded. Thesepressures are stamped on the nameplatesattached to the main valve and pilot.

Types 92B and 92P

8

Type 92PLoading Relay � Any suitable air loading regulatorsuch as a Fisher Type 67, 670 or 1301F Series can beused as a loading relay. It is recommended that ableed orifice be installed in the second outlet of theloading relay.

1. Inspect the Type 92P for any shipment damage.Remove any foreign matter that may have collected inthe valve during shipment.

2. Blow down the pipe line wherever practical.

3. Install a strainer ahead of the valve to protect theinternal parts of the valve.

4. Install an upstream block valve ahead of theType 92P so that the regulator can be isolated andserviced. If continuous operation is necessary duringmaintenance or inspection, install a bypass valve andpiping around the Type 92P and a block valve in thedownstream.

5. This Type 92P is intended to be installed with thediaphragm case above the pipeline so that condensatewill not collect in the case.

6. Install the Type 92P in the pipeline so that the flowwill be in the direction indicated by the arrow cast on

the body. Follow normal piping procedures wheninstalling the screwed or flanged Type 92P.

7. Install the external control lines as follows:

a) Connect one end of the control line to theType 92P body tapping. This NPT tapping is 1/4-inchfor 1 and 1-1/2-inch bodies, 3/8-inch a for2-inch body, or 1/2-inch for 3 and 4-inch bodies.

Note

The control line should be as large as thetapped hole in the Type 92P.

b) The other end of the control line is connected tothe downstream system. Place the tapped hole for thisconnection in a straight run of pipe 3 to 5 feet from thecontrol valve when the valve body is the same size asthe pipeline. If the valve body is smaller than thepipeline and requires swage nipples, place the tappedhole at a distance from the swage connection equal to10 times the pipe diameter.

c) Do not locate the control line tap in an elbow,swage or other section of the pipeline where turbulenceor abnormal velocity may occur.

d) Do not locate the control line tap in a vessel(such as a deaerator) located immediately downstream

Figure 7. Pneumatically Operated Heat Exchanger Installation With Temperature ControlThe 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.

BLEED FITTING

TYPE 92P

TRAP

TYPE 4196 CONTROLLER

TYPE 67CFR

HEAT EXCHANGER

WELL

100 PSIG(6,9 bar)AIRAMPLIFYING RELAY

100 PSIG (6,9 bar)AIR

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

HOT WATER

COLD WATER

Types 92B and 92P

9

of the Type 92B. Locate the tap in the pipeline leadingto the vessel.

e) Slope the control line away from the Type 92Pso that condensate can drain back into the pipeline.

f) Install a shutoff valve (not a needle valve) in thecontrol line.

g) Install a pressure gauge in the control line ornear the outlet of the control valve to aid in setting themanual loader.

The maximum inlet and outlet pressuresfor which this Type 92P has been manu-factured should not be exceeded. Thesepressures are stamped on the nameplateattached to the control valve.

Startup and Adjustment

Failure to remove accumulated conden-sate may result in severe condensationinduced water hammer which can resultin personal injury or death.

Prior to valve startup:New InstallationsBlow down inlet steam piping to remove any debrissuch as weld beads by opening the drain valve of theinlet stainer to the control valve. Close the isolationvalve and disassemble strainer to remove accumulatedebris. Repeat as necessary until strainer basket isfree of debris.

Old InstallationsOpen all upstream and downstream drain valves at driplegs and strainers to drain condensate that may haveaccumulated during the shutdown period. Crack theinlet isolation valve to the pressure reducing stations toflush any residual condensate. Close the drain valvesonce the drain is free of condensate.

Pilot AdjustmentTo adjust the downstream reduced pressure setting,turn the set screw clockwise into the spring case to

increase the downstream pressure setting. Turn itcounterclockwise out of the spring case to decreasethe setting. Loosen hex nut on screw before adjust-ment and tighten it once adjustment is made.

Type 92BTo put the valve into operation after installation or afterdisassembly for inspection or repairs, proceed asfollows, referring to figures 5, 11, and 12 as necessary.

1. Relieve all spring compression on the pilot springby loosening hex nut (key 16) and turning set screw(key 15) counterclockwise (out of the spring case).

2. Open the upstream block valve.

3. Open the downstream block valve slowly.

4. Close the bypass valve.

5. Slowly turn the set screw of the pilot clockwise intothe spring case until the downstream pressure reachesthe required setting. Tighten hex nut on the set screw.

Type 92PUse the following procedure to put the valve intooperation:

1. Open the upstream block valve.

2. Slowly open the downstream block valve.

3. Close the bypass valve.

4. Adjust the control system to obtain the desiredcontrolled pressure.

The only adjustment that will affect the 92P is thepressure setting of the control system.

Safety Override SystemUse the following procedure to put the system intooperation, referring to figure 4 as necessary:

1. Remove all pilot control spring compression from theType 6492HM safety override pilot (A) by turning theadjusting screw out of the spring case (counterclockwise).

2. Adjust the Type 92B upstream working pilot�s (B)and Type 92B downstream working pilot�s (C) adjustingscrews into the spring case (clockwise) to their maxi-mum adjustment.

3. SLOWLY open the upstream block valve to intro-duce inlet pressure to the system.

Types 92B and 92P

10

4. Open the downstream block valve and control lineblock valves, if used.

Note

Some flow is needed to make pressuresettings accurate.

5. If a bypass is used, slowly close the bypass lineblock valve.

6. Adjust the Type 6492HM safety override pilot (A) tothe desired downstream override pressure. The safetyoverride pilot�s setpoint must be higher than the down-stream working pilot�s (C) setpoint by the amountslisted in table 4.

Note

The normal pressure and maximumoverride pressure should be set at orbelow the safe working pressure of theequipment and piping system down-stream. (Reference applicable codes and/or standards for maximum allowable orsafe working pressures for equipmentand piping systems served.)

7. Adjust the Type 92B downstream working pilot (C)to the desired normal downstream control pressure.

8. Adjust the Type 92B upstream working pilot (B) tothe desired intermediate control pressure (typically 50%of inlet pressure).

9. Readjust the Type 92B downstream working pilot(C) to the desired normal downstream control pressure,if necessary.

10. Tighten the lock nuts on all pilots to lock theadjusting screws in position.

TroubleshootingOperating difficulties may be experienced with thisvalve as a result of improper installation, impropervalve sizing, damage to internal parts, trim wear, or anaccumulation of dirt, boiler compound, or other foreignmaterials on internal parts. When trouble occurs, checkthe following:

Type 92BBuildup of Downstream Pressure1. Check for plugged bleed fitting (key 61, figure 10).

2. Check the screen (key 77, figure 11 or 12) forclogging and the other pilot internal parts for accumula-tion of dirt, boiler compound, or other materials.

Failure to Maintain Downstream Pressure1. Check for ruptured diaphragm (key 60, figure 10).2. Check to see that the valve is not undersized.

Cycling or HuntingCheck to see that the valve is not oversized. A cyclingType 92B might possibly control the downstreampressure within acceptable limits but the life of thediaphragms, guide bushings, seat ring, and valve plugcould be greatly reduced.

If cycling occurs, as a result of oversizing or othercauses, it can frequently be minimized by reducing thegain of the Type 92B. This can be accomplished byinstalling a suitable reducing regulator such as a Type95H in the Type 92B pilot supply line (�F� of figure 2).Adjust the pilot supply line regulator to reduce pilotsupply pressure to about 30 psig (2,1 bar) above theoutlet pressure setting of the Type 92B valve. Thisarrangement can minimize cycling and still provideadequate pilot supply pressure to ensure full opening ofthe main valve plug, if required.

Note

The 30 psig (2,1 bar) is suggested for unitswhich include the standard 17-4 PHstainless steel main spring. This springrequires approximately 20 psig (1,4 bar)diaphragm differential pressure to fullystroke the main valve. If the lighter rateInconel spring is used, only about 10 psig(0,69 bar) diaphragm differential pressureis required to fully stroke the unit. There-fore, the pilot supply pressure can bereduced to about 20 psig (1,4 bar) abovethe outlet pressure setting of the controlvalve without loss of control capability.

Type 92P

Buildup of Downstream Pressure withoutLoading Pressure on the Diaphragm1. Check internal parts for buildup of dirt, boiler

compound, or other matter.

2. Check the trim for seizing or galling.

Types 92B and 92P

11

Failure to Maintain Downstream Pressure1. Check for ruptured diaphragm (key 10, figure 17).2. Check to see that the valve is not undersized.

Cycling or HuntingCheck to see that the valve is not oversized. A cyclingType 92P might possibly control the downstreampressure within acceptable limits but the life of thediaphragms, guide bushings, seat ring, and valve plugcould be greatly reduced.

Maintenance

Before disassembly or removing thecontrol valve from the line, isolate it fromthe pressure system and release all thepressure from the control valve.

Due to normal wear, parts must be periodically in-spected and replaced if necessary. The frequency ofinspection depends on the severity of the service.

Main Valve Disassembly

Type 92BKey numbers listed are shown on the body assemblydrawing, figure 10.

1. Remove all tubing.

2. Mark the outside edge of the body and diaphragmcase flanges with assembly marks to ensure properassembly. Remove bolts from diaphragm case and liftoff the case. On cast iron body sizes 1-1/2 through4-inch, first remove the loading tubing compressioncoupling fitting from the pipe nipple.

3. Take out the diaphragm assembly which consistsof two metal diaphragms (key 60), bleed fitting(key 61), and diaphragm plate (key 59). Separate

Figure 8. Typical Type 92B Construction

W1322-3A

PIPE PLUG OR TUBE FITTING �DIRECTLY OVER ORIFICEFOR EASE OF ACCESSIBILITY

DIAPHRAGMSAND DIAPHRAGMPLATE

DIAPHRAGM CASE

GUIDEBUSHING

PILOT SPRING CASE

PILOT PRESSURESETTING SPRING

BELLOWS ANDBELLOWSRETAINER

LOWER SPRING SEAT

ORIFICE

CHECK VALVE ASSEMBLY

PILOT VALVE STEMAND PLUG

VALVE STEM GUIDEPILOT VALVE SPRING

BOTTOM FLANGE

REDUCING VALVE SPRING

VALVE PLUG ANDSEAT RING

VALVE BODY

BLEED ORIFICE �EASILY CLEANED WITH WIRE

Types 92B and 92P

12

these parts by unscrewing the bleed fitting from thediaphragm plate.

4. Remove cap screws from bottom flange (key 52).Take off bottom flange. The valve plug (key 56) andspring (key 57) will drop out.

5. Pull the seat ring (key 58), if it shows signs of wearand needs to be replaced. Drive the upper guidebushing (key 53) from the body (key 51) and pull thelower guide bushing from the bottom flange (key 52) ifnecessary.

Type 92PKey numbers listed are shown on the body assemblydrawing, figure 17.

1. Isolate the valve by closing the upstream and down-stream block valves. Shut the valve in the control line.

2. Blow down the isolated line to remove pressure inthe main valve.

3. Shut down the manual loader and disconnect tubingfrom the inlet in the upper diaphragm casing.

4. Remove the bolts from the diaphragm case and liftoff the upper half.

5. Take out the diaphragm assembly which consists oftwo metal diaphragms (key 10), a travel stop (key 11),and a diaphragm plate (key 20). Separate these parts byunscrewing the travel stop from the diaphragm plate.

6. Remove the cap screws from the bottom flange (key2). The valve plug (key 6) and spring (key 7) will nowdrop out.

7. Pull the seat ring (key 8), if it shows signs of wearand needs to be replaced. Drive the upper guide bushing(key 3) from the body (key 1) and pull the lower guidebushing from the bottom flange (key 2) if necessary.

Pilot DisassemblyType 92B Pilot OnlyKey numbers listed are shown on the appropriate pilotassembly drawing, figures 11, 12, 13, or 14.

1. Remove pilot from main valve by unscrewing itfrom the mounting nipple or unscrewing the nipple frommain valve.

2. Relieve the spring compression by turning the setscrew (key 15) counterclockwise after loosening hexnut (key 16).

3. Remove the casing cap screws. Take off the springcase, and remove upper spring seat, spring, lowerspring seat, two diaphragms, and the diaphragm gasket.Note that in a low pressure pilot (figure 11), the lowerspring seat and the diaphragm plate are both parts ofthe diaphragm plate assembly (key 24) and are pinnedtogether.

4. Unscrew the bellows retainer (key 8) from the pilotbody. Take out the bellows and the valve stem (keys 9and 7).

5. Unscrew the valve plug guide (key 2). The valveplug (key 4), the valve plug spring (key 3), and thestrainer screen (key 77) will come out with the guide.

6. Unscrew the orifice (key 5), if necessary.

7. Remove the check-valve assembly (key 75) with ascrewdriver after having removed the pipe plug

Figure 9. Type 92B High Pressure Pilot Exploded View

SET SCREW

JAM NUT

SCREWS (8)

SPRING CASE

UPPER SPRING SEAT

SPRING

LOWER SPRING SEAT

DIAPHRAGMS (2)

DIAPHRAGM GASKET

BELLOWS RETAINER

BELLOWS

VALVE STEM

VALVE BODYPIPE PLUG

CHECK VALVE ASSEMBLY

ORIFICEVALVE PLUG

VALVE PLUG SPRING

VALVE PLUG GUIDE

STRAINER SCREEN

W0070_2_1A

Types 92B and 92P

13

YDOBLAIRETAM

,EZISYDOB)ND(SEHCNI

GNIRTAES)85YEK(

GNITTIFDEELB)16YEK(

PACESACMGARHPAIDSTUNXEH/SWERCS

)46/36YEK(

PACEGNALFMOTTOB)55YEK(SWERCS

norItsaC

)52(1 )961-631(521-001 )93-03(92-32 )59-86(07-05 )6,04-5,23(03-42

)04(2/1-1 )732-302(571-051 )26-5,15(64-83 )631-801(001-08 )6,87-26(85-64

)05(2 )933-503(052-522 )26-5,15(64-83 )941-921(011-59 )6,87-26(85-64

)08(3 )016-245(054-004 )361-221(021-09 )671-941(031-011 )201-3,18(57-06

)001(4 )1941-6531(0011-0001 )091-631(041-001 )671-941(031-011 )852-012(091-551

,leetSleetSsselniatS

)52(1 )503-172(522-002 )93-03(92-32 )59-86(07-05 )6,04-5,23(03-42

)04(2/1-1 )373-933(572-052 )26-5,15(64-83 )631-801(001-08 )6,87-26(85-64

)05(2 )245-574(004-053 )26-5,15(64-83 )941-921(011-59 )6,87-26(85-64

)08(3 )188-318(056-006 )361-221(021-09 )671-941(031-011 )201-3,18(57-06

)001(4 )1941-6531(0011-0001 )091-631(041-001 )671-941(031-011 )852-012(091-551

Table 5. Type 92B Main Valve Torques in Ft-Lbs (N�m)

(key 74). Be sure the check-valve is not clogged.Replace the entire check-valve assembly, if necessary.The check valve assembly should not be disassembledin the field, because its setting is made at the factoryand will be lost by disassembling.

Main Valve Reassembly

Type 92B (figure 10)Inspect all internal parts for excessive wear or damage.Use new parts when necessary (see table 5 for torquevalues). Reassemble the main valve as follows:

1. If removed, install guide bushings (key 53) in thebody (key 51) and bottom flange (key 52).

2. Apply high temperature thread sealant to seat ringthreads. Screw in the seat ring (key 58) (see table 5 fortorque values).

3. Install valve plug (key 56) and its spring (key 57).

4. Use new bottom flange gasket (key 54) and replacethe bottom flange (key 52). Lubricate and replace capscrews (key 55) (see table 5 for torque values).

5. Make up the diaphragm assembly by lubricatingand then screwing the bleed fitting (key 61) into thediaphragm plate (key 59) (see table 5 for torque val-ues), and clamping the diaphragm (key 60) in place.

Table 6. Type 92P Main Valve Torques in Ft-Lbs (N�m)

LAIRETAMYDOB ,EZISYDOB)ND(SEHCNI

GNIRTAES)8YEK(

GULPETALPMGARHPAID)11YEK(

PACESACMGARHPAIDSTUNXEH/SWERCS

)41/31YEK(

PACEGNALFMOTTOB)5YEK(SWERCS

norItsaC

)52(1 )961-631(521-001 )93-03(92-32 )59-86(07-05 )6,04-5,23(03-42

)04(2/1-1 )732-302(571-051 )26-5,15(64-83 )631-801(001-08 )6,87-26(85-64

)05(2 )933-503(052-522 )26-5,15(64-83 )941-921(011-59 )6,87-26(85-64

)08(3 )016-245(054-004 )361-221(021-09 )671-941(031-011 )201-3,18(57-06

)001(4 )1941-6531(0011-0001 )091-631(041-001 )671-941(031-011 )852-012(091-551

,leetSleetSsselniatS

)52(1 )503-172(522-002 )93-03(92-32 )59-86(07-05 )6,04-5,23(03-42

)04(2/1-1 )373-933(572-052 )26-5,15(64-83 )631-801(001-08 )6,87-26(85-64

)05(2 )245-574(004-053 )26-5,15(64-83 )941-921(011-59 )6,87-26(85-64

)08(3 )188-318(056-006 )361-221(021-09 )671-941(031-011 )201-3,18(57-06

)001(4 )1941-6531(0011-0001 )091-631(041-001 )671-941(031-011 )852-012(091-551

EDIUGEVLAV)2YEK(

ECIFIRO)5YEK(

RENIATERSWOLLEB)8YEK(

YLBMESSAEVLAVKCEHC)57YEK(

GULPEPIP)47YEK(

SWERCSPAC)71YEK(

)6,87-75(85-24 )43-8,52(52-91 )43-8,52(52-91 )3,02-7(51-5 )43-8,52(52-91 )4,42-3,61(81-21

Table 7. Type 92B Pilot Torques in Ft-Lbs (N�m)

Types 92B and 92P

14

6. Place the diaphragm assembly on the body andreplace the diaphragm case (key 62). Make sureassembly marks line up. Lubricate and replace capscrews and nuts (keys 63 and 64) (see table 5 forproper torque values). On cast iron bodies, install theloading tubing compression coupling fitting on the pipenipple (sizes 1-1/2 through 4-inch).

7. Reconnect all tubing after the pilot is mounted.

Type 92P (figure 17)Inspect all internal parts for excessive wear or damageand replace with new parts when necessary. Reas-semble the main valve as follows (see table 6 fortorque values):

1. If removed, install guide bushings (key 3) in thebody (key 1) and bottom flange (key 2).

2. Apply high temperature thread sealant to seat ringthreads. Screw in the seat ring (key 8) (see table 6 fortorque values).

3. Install the valve plug (key 6) and its spring (key 7).

4. Use new bottom flange gasket (key 4) and replacethe bottom flange (key 2). Lubricate and replace capscrews (key 5) (see table 6 for torque values).

5. Make up the diaphragm assembly by placing thediaphragms between the diaphragm plates and clamp-ing them together with the travel stop.

6. Place the diaphragm assembly on the body andreplace the diaphragm case. Lubricate and replace capscrews (key 13) and nuts (key 14) (see table 6 fortorque values).

7. Reconnect the line from the manual loader.

Type 92B Pilot Reassembly(figure 11 or 12)Inspect all internal parts for excessive wear or damage.Use new parts wherever necessary. Reassemble thepilot as follows (see table 7 for torque values):

1. Apply high temperature thread sealant to the orificethreads. Screw in the orifice (key 5) (see table 7 fortorque values).

2. Place valve plug spring (key 3), the valve plug(key 4), and the strainer screen (key 77) in the valveplug guide (key 2). Apply high temperature threadsealant to the plug guide threads. Screw guide intobody (key 1) (see table 7 for torque values).

3. Place valve stem (key 7) in the body, smallerdiameter first.

4. Apply high temperature thread sealant to bellowsretainer threads. Place bellows (key 9) in body andsecure in place by installing the bellows retainer (key 8)(see table 7 for torque values).

5. Use new diaphragm gasket (key 18) and put twodiaphragms (key 10) in place on the body with raised,preformed centers toward spring case.

6. Stack the lower spring seat (key 11), spring(key 12), and upper spring seat (key 13) on the dia-phragm and install the spring case. Note that on the lowpressure pilot, the lower spring seat and diaphragmplate are part of a subassembly.

7. Lubricate and replace casing cap screws (key 17).

8. Mount pilot on main valve and install all tubing.

To Clean Pilot Strainer AssemblyRemove the valve plug guide (key 2). The valve plug(key 4), the valve plug spring (key 3), and the strainerscreen (key 77) will come out with the guide. Inspectand clean or replace as required. Key numbers arereferenced in figure 11 or 12.

To Clean Bleed FittingIf the 5/64-inch diameter hole in the bleed fitting (key61) becomes plugged, it can be cleared by running awire through it. To gain access to this hole, first isolatethe valve and relieve all pressure. Then remove eitherthe tubing and fitting or the pipe plug from the top of thediaphragm case. Clear the hole, replace the case fittingand resume normal operation. Key numbers arereferenced in figure 10.

Types 6492HM and 6492HTM PilotsThese procedures are to be performed if inspecting,cleaning, or replacing any pilot parts, or of cycling,erratic control, or too high or too low an outlet (control)pressure is noted. Perform only those procedures inthis section required to correct the problem. Keynumbers are referenced in figure 18.

Note

Before performing any maintenance,loosen the hex nut (key 16), if used, andturn the adjusting screw (key 15) counter-

Types 92B and 92P

15

clockwise until all compression isremoved from the control spring (key 12).Remove the pilot from the pipe nippleand connectors (keys 22 and 78,figure 20).

1. Unscrew the plug guide (key 2). Remove thescreen (key 77), plug (key 4), plug spring (key 3), andstem (key 7). Unscrew the orifice (key 5). Examinethe orifice and plug seating surfaces for damage.

2. Clean and replace parts as necessary. Apply hightemperature sealant to the orifice threads. Thread theseat ring into place and tighten using 19 to 25 foot-pounds (26 to 34 N�m) of torque.

3. Handle the parts carefully, and place the plugspring (key 3) in the plug guide (key 2). Slide the plug(key 4) over the spring and into the plug guide. Placethe screen (key 77) onto the plug guide. Place thestem (key 7) in the center hole of the plug guide.Apply sealant to the plug guide threads, and screw theguide plus attached parts into the body (key 1).

4. Remove the pipe plug (key 74). Then remove thepipe plug (key 94). Clean and replace the pipe plug asnecessary.

5. Apply high temperature sealant to the threads ofthe pipe plug (key 94) and install into the body (key 1).

6. Apply high temperature sealant to the threads ofthe pipe plug (key 74). Install into the body (key 1).

7. Remove the cap screws (key 17), spring case(key 14), control spring (key 12), and upper spring seat(key 13) from the body (key 1).

8. Remove the lower spring seat (key 11), dia-phragms (key 10), and diaphragm gasket (key 18) fromthe body. Inspect and clean the diaphragm gasket.Replace if necessary.

9. Unscrew the bellows retainer (key 8) and removethe bellows (key 9). Replace worn parts as necessary.Apply high temperature sealant to the bellow retainerthreads. Install the bellows and bellows retainer.Tighten the bellows retainer using 19 to 25 foot-pounds(26 to 34 N�m) of torque.

10. Install the diaphragm gasket. Install both dia-phragms with their raised performed centers facingtoward the spring case.

11. Lubricate the upper spring seat and the exposedthreads of the adjusting screw. Install the lower springseat (key 11), control spring (key 12), upper springseat (key 13), and spring case (key 14). Insert and

tighten the cap screws (key 17) in a crisscross boltingpattern using 12 to 18 foot-pounds (16 to 24 N�m) oftorque.

Parts OrderingEach Type 92B valve is assigned an FS or serialnumber. It can be found stamped on the nameplateattached to the spring case of the pilot.

Each Type 92P valve is assigned an FS or serialnumber. This can be found stamped on the nameplateattached to the lower diaphragm case.

Refer to the FS or serial number and the complete partnumber when ordering spare parts or requesting techni-cal advice from your Fisher Sales Representative orSales Office.

Types 92B and 92P

16

1. Recommended spare part

Key Description Part Number

51 Valve Body Assembly (includes body withseat ring - key 58 and guide bushing - key 53)Cast IronNPT1-inch (DN 25) 3H5846000B21-1/2-inch (DN 40) 3H2748000B22-inch (DN 50) 3F2497000B2

Class 125FF flanged1-1/2-inch (DN 40) 3H2750000A22-inch (DN 50) 3F2498000B23-inch (DN 80) 3H3064000A24-inch (DN 100) 3H3146000A2

Class 250RF flanged1-1/2-inch (DN 40) 3H2751000A22-inch (DN 50) 3F2499000B23-inch (DN 80) 3H3065000A24-inch (DN 100) 3H3147000A2

SteelNPT1-inch (DN 25) T20895X00121-1/2-inch (DN 40) T20895X00422-inch (DN 50) T20895X0072

Class 150RF flanged1-inch (DN 25) T20895X00221-1/2-inch (DN 40) T20895X00522-inch (DN 50) T20895X00823-inch (DN 80) T20895X01024-inch (DN 100) T20895X0122


Stainless SteelNPT1-inch (DN 25) T21160X00121-1/2-inch (DN 40) T21160X00422-inch (DN 50) T21160X0072



52 Bottom Flange AssemblyCast iron1-inch (DN 25) 1J3024000A21-1/2-inch (DN 40) 1J3026000A22-inch (DN 50) 1J4339000A23-inch (DN 80) 0U0357000A24-inch (DN 100) 0T0786000A2

Steel1-inch (DN 25) 29B468600A21-1/2-inch (DN 40) 39B551300A22-inch (DN 50) 39B045200A23-inch (DN 80) 39B581200A24-inch (DN 100) 39B642300A2

Stainless Steel1-inch (DN 25) 29B468600B21-1/2-inch (DN 40) 39B551300B22-inch (DN 50) 39B045200B23-inch (DN 80) 39B581200B24-inch (DN 100) 39B642300B2

Parts ListType 92B Main Valve (figure 10)Key Description Part Number

Parts Kits (includes keys: 54, 56, 58, and 60)Cast Iron1-inch (DN 25) R92BX0000221-1/2-inch (DN 40) R92BX0000322-inch (DN 50) R92BX0000423-inch (DN 80) R92BX0000624-inch (DN 100) R92BX000072

Steel1-inch (DN 25) R92BX0000921-1/2-inch (DN 40) R92BX0001022-inch (DN 50) R92BX0001123-inch (DN 80) R92BX0000624-inch (DN 100) R92BX000122

19 Drive Screw, Stainless SteelCast Iron Body (5 required) 1A368228982Steel Body (3 required) 1A368228982

20 Warning Label (Cast Iron only) 1F13701899221 Nameplate - - - - - - - - - - -51 Valve Body Only

Cast IronNPT1-inch (DN 25) 3H5846190221-1/2-inch (DN 40) 3H2748190122-inch (DN 50) 3F249719022

Class 125FF flanged1-1/2-inch (DN 40) 3H2750190222-inch (DN 50) 3F2498190223-inch (DN 80) 3H3064190224-inch (DN 100) 3H314619022

Class 250RF flanged1-1/2-inch (DN 40) 3H2751190222-inch (DN 50) 3F2499190223-inch (DN 80) 3H3065190224-inch (DN 100) 3H314719022

SteelNPT1-inch (DN 25) 59B0454X0121-1/2-inch (DN 40) 59B5508X0122-inch (DN 50) 59B0440X012

Class 150RF flanged1-inch (DN 25) 59B0455X0121-1/2-inch (DN 40) 59B4696X0122-inch (DN 50) 59B0441X0123-inch (DN 80) 59B0463X0124-inch (DN 100) 59B0465X012


Stainless SteelNPT1-inch (DN 25) 59B0454X0221-1/2-inch (DN 40) 59B5508X0222-inch (DN 50) 59B0440X022




Types 92B and 92P

17

Figure 10. Type 92B Main Valve Assembly

30A6348-B1a

30A6348-B2

Types 92B and 92P

18



60(1) Diaphragm, S30200 Stainless Steel (2 required)1-inch (DN 25) 1F2514360121-1/2-inch (DN 40) 1F3012360122-inch (DN 50) 1F2503360123-inch (DN 80) 1F3249360124-inch (DN 100) 1F335736012

61 Bleed Fitting, S41600 Stainless Steel1-inch (DN 25) 1F2513351321-1/2 and 2-inch (DN 40 and 50) 1F2502351323-inch (DN 80) 1F3250351324-inch (DN 100) 1F335835132

62 Diaphragm CaseCast Iron Body, Cast Iron1-inch (DN 25) 2L5472190121-1/2-inch (DN 40) 2L5863190122-inch (DN 50) 2L5866190223-inch (DN 80) 2L5872190224-inch (DN 100) 2F336019022

Steel Body, WCC Steel1-inch (DN 25) 39B4682X0121-1/2-inch (DN 40) 39B4700X0122-inch (DN 50) 39B4681X0123-inch (DN 80) 39B5813X0124-inch (DN 100) 49B4621X012

Stainless Steel Body, CF8M Steel1-inch (DN 25) 39B4682X0221-1/2-inch (DN 40) 39B4700X0222-inch (DN 50) 39B4681X0223-inch (DN 80) 39B5813X0224-inch (DN 100) 49B4621X022

63 Cap Screw, Plated Steel12 required1-inch (DN 25) 1A4130240521-1/2 and 2-inch (DN 40 and 50) 1A417524052

16 required3 and 4-inch (DN 80 and 100) 1A427824052

64 Hex Nut, Plated Steel12 required1-inch (DN 25) 1A4132241221-1/2 and 2-inch (DN 40 and 50) 1A417624122

16 required3 and 4-inch (DN 60, 80, and 100) 1A420124122

69 Pipe PlugSteel 1A369224492Stainless Steel 1A369235072

Type 92B Pilot (figures 11, 12, 13, and 14)Key Description Part Number

Parts Kits (includes keys: 4, 5, 7, 8, 9,10, 18, and 77)Low Pressure PilotCast iron R92BLPX0012Steel R92BLPX0022

High Pressure PilotCast iron R92BHPX0012Steel R92BHPX0022

1 Pilot Valve BodyCast IronLow pressure 32A0404X012High pressure 22A0403X012

SteelLow pressure 32A0404X052High pressure/High temperature 22A0403X052

Stainless SteelLow pressure 32A0404X062High pressure/High temperature 22A0403X072

2 Valve GuideCast Iron/Steel, 41600 Stainless Steel 1E391835132Stainless Steel, 31600 Stainless Steel 1E391835072

3 Valve Spring, S30200 Stainless Steel 1E392437022


53 Guide Bushing, 17-4 PH Stainless steel1-inch (DN 25) 1A4091350121-1/2-inch (DN 40) 1A4161350122-inch (DN 50) 1A4192350123-inch (DN 80) 1A4271350124-inch (DN 100) 1A430935012

54(1) GasketCast Iron Body, Composition1-inch (DN 25) 0U0200040221-1/2-inch (DN 40) 0U0247040222-inch (DN 50) 0T0681040223-inch (DN 80) 0U0365X00324-inch (DN 100) 0T078804022

Steel and Stainless Steel Body, Grafoil1-inch (DN 25) 0U0200X00121-1/2-inch (DN 40) 0U0247X00122-inch (DN 50) 0T0681X0012

3-inch (DN 80) 0U0365X0032 4-inch (DN 100) 0T0788X0012

55 Cap Screw, Plated Steel1-inch (DN 25) (6 required) 1A3369240521-1/2-inch (DN 40) (6 required) 1A3375240522-inch (DN 50) (6 required) 1A4185240523-inch (DN 80) (8 required) 1A3444240524-inch (DN 100) (8 required) 1A430224052

56 Valve Plug, Stainless Steel1-inch (DN 25) 2P9796461721-1/2-inch (DN 40) 2P9797461722-inch (DN 50) 2P9798461723-inch (DN 80) 2P9800461924-inch (DN 100) 3P980146192

57 Spring17-4 PH Stainless SteelStandard for 20 psi (1,4 bar) pressure drop or greater1-inch (DN 25) 1R1513370521-1/2-inch (DN 40) 1R1514370522-inch (DN 50) 1R1515370523-inch (DN 80) 1R1517370524-inch (DN 100) 1R151837052

Inconel10 to 20 psi (0,69 to 1,4 bar) minimum pressure drop1-inch (DN 25) 0U0202420121-1/2-inch (DN 40) 0U0237420122-inch (DN 50) 0T0860420123-inch (DN 80) 0U0359420124-inch (DN 100) 0T085842012

58(1) Seat Ring, Stainless steel1-inch (DN 25) 2P9803461721-1/2-inch (DN 40) 2P9804461722-inch (DN 50) 2P8967461923-inch (DN 80) 2P8980461924-inch (DN 100) 2P980546192

59 Diaphragm PlateCast Iron Body, Cast Iron1-inch (DN 25) 1F2515190121-1/2-inch (DN 40) 1F3010190122-inch (DN 50) 1F2504190123-inch (DN 80) 1F3248190124-inch (DN 100) 1F335619012

Steel Body, WCC Steel1-inch (DN 25) 19B4685X0121-1/2-inch (DN 40) 19B5514X0122-inch (DN 50) 29B0453X0123-inch (DN 80) 29B5811X0124-inch (DN 100) 29B6425X012

Stainless Steel Body, CF8M Steel1-inch (DN 25) 19B4685X0221-1/2-inch (DN 40) 19B5514X0222-inch (DN 50) 29B0453X0223-inch (DN 80) 29B5811X0224-inch (DN 100) 29B6425X022

Types 92B and 92P

19

Figure 11. Low Pressure Pilot Assembly

CJ8998-E


4(1) Valve PlugCast Iron/Steel, 41600 Stainless Steel 1F967446172Stainless Steel, 31600 Stainless Steel 1F9674X0012

5(1) OrificeCast Iron/Steel, 41600 Stainless Steel 1H564446172Stainless Steel, 31600 Stainless Steel 1H5644X0012

7 Valve StemCast Iron/Steel, 41600 Stainless Steel 1F967835132Stainless Steel, 31600 Stainless Steel 1F9678X0012

8 Bellows RetainerCast Iron/Steel, Brass 1F971214012Stainless Steel, 31600 Stainless Steel 1F9712X0012

9 BellowsCast Iron or Steel, Bronze 1F971318992High Temperature Steel Pilot andStainless Steel, 321 Stainless Steel 1F9713X0012

10(1) Diaphragm, S30200 Stainless Steel(2 required)Low pressure 1E396936012High pressure/High temperature 1E395836012

11 Lower Spring Seat, AluminumHigh pressure 1J914008012High temperature 14B9948X012


12 Spring, Plated SteelLow pressure pilot2 to 6 psig (0,14 to 0,41 bar) 1E3956270225 to 15 psig (0,34 to 1,0 bar) 1D74552714213 to 25 psig (0,90 to 1,7 bar) 1E395727192

High pressure pilot15 to 30 psig (1,0 to 2,1 bar) 1E39562702225 to 75 psig (1,7 to 5,2 bar) 1D74552714270 to 150 psig (4,8 to 10,3 bar) 1E395727192

High temperature pilot15 to 100 psig (1,0 to 6,9 bar) 14B9943X01280 to 250 psig (5,5 to 17,2 bar) 14B9942X012

13 Upper Spring Seat, Plated SteelLow/High pressure 1D667125072High temperature 14B9951X012

14 Spring CaseCast Iron, Cast IronLow pressure 3J496319012High pressure 2J496219012

Steel, WCC SteelLow pressure 3L416122012High pressure 2L416322012

Stainless Steel, 31600 Stainless SteelLow pressure 3L4161X0022High pressure 2L416333092

Types 92B and 92P

20


15 Set Screw, Plated Steel 1D99544870216 Hex Nut, Plated Steel 1A35372412217 Cap Screw

Cast Iron/Steel, Plated Steel Low pressure (10 required) 1A381624052 High pressure (8 required) 1A381624052 High temperature (8 required) 1A3816X0132

Stainless Steel, Stainless Steel Low pressure (10 required) 1A3816X0152 High pressure (8 required) 1A3816X0152 High temperature (8 required) 1A3816X0152

18(1) Diaphragm GasketCast Iron Body, CompositionLow pressure 1E397004022High pressure 1E396104022

18(1) Diaphragm Gasket (continued)Steel and Stainless Steel Body, GrafoilLow pressure 1E3970X0012High pressure 1E3961X0012


19 Drive Screw (2 required) 1A36822898220 Nameplate - - - - - - - - - - -22 Pipe Nipple

Cast Iron/Steel, Plated Steel Low pressure 1B825226012 High pressure/High temperature 1A473526012

Stainless Steel, 31600 Stainless Steel Low pressure 1B8252X0012 High pressure/High temperature 1A4735X0012

24 Diaphragm Plate Assembly Low pressure only 1J9000000A2

34 Machine Screw 16A5763X01274 Pipe Plug

Cast Iron/Steel, Plated Steel 0Z020128992 Stainless Steel, 31600 Stainless Steel 0Z020135072

75 Check Valve AssemblyCast iron or Steel Pilot Body 12A0405X012Stainless Steel Pilot Body 12A0405X022

77 Screen, Stainless steel 16A1512X012

Figure 12. High Pressure Pilot AssemblyBF9827-G


Types 92B and 92P

21

Figure 14. Optional Sealed Adjusting Screw

CN710032A4712-AA3505-1

STEEL AND STAINLESSSTEEL BODY CAST IRON BODY

Figure 13. Optional Handwheel Assembly

!J4965

Optional Handwheel (figure 13)Key Description Part Number

Handwheel Assembly15 Set Screw, Plated Steel 1J49642898216 Hex Nut, Plated Steel (not shown) 1A35372412234 Machine Screw 16A5763X01238 Handwheel 1J49614401239 Lock Washer 1A352332992

Optional Sealed Adjusting Screw (figure 14)Key Description Part Number

For Cast Iron Construction14 Spring Case

Low pressure 3H776419012High pressure 2H842219012

25 Stuffing Box 1L32402409226 Adjusting Screw 1L44973523227 Packing Follower 1K88492409228 Stuffing Box Nut 0P07762410229 Packing (3 required) 1H78430101230 Stuffing Box Gasket 1A64829921231 Handwheel 1L36964499232 Female Adaptor 1H78440101233 Male Adaptor 1H78420101234 Machine Screw 16A5763X01235 Spring 1F12543701236 Packing Washer 1H98183604237 Lock Washer 1L323928982

For Steel or Stainless Steel Construction14 Spring Case

Steel, WCC SteelLow pressure 3L442222012High pressure 2L442022012

Stainless Steel, 31600 Stainless SteelLow pressure 3L4422X0012High pressure 2L4420X0012

15 Set Screw, Plated Steel 1D99544870216 Hex Nut, Plated Steel 1A35372412287 Sealing Washer 1V205699012


Types 92B and 92P

22

Figure 15. Cast Iron Pilot Assembly (use for 1-1/2 through 4-inch assemblies)

2F2573_L

Figure 16. Steel Pilot Mounting Assembly (High Pressure Pilot Shown)

PILOT UP, LEFT SIDE

CONTROLTUBING

LOADINGTUBING

39B4689_1

Types 92B and 92P

23


Type 92B Pilot Mounting Parts(figures 15 and 16)Key Description Part Number

22 Pipe Nipple (For 1-1/2, 2, 3 and 4-InchCast Iron Construction Only) 1C488226232

65 Loading Tubing - - - - - - - - - - -66 Pipe Bushing, Plated Steel

Plated Steel 1C379026232Stainless Steel 1C3790X0012

67 Pipe Plug, Steel (For 1-1/2, 2, 3 and 4-InchCast Iron Construction Only) 1A369224492

70 Control Tubing - - - - - - - - - - -71 Male Connector

Cast Iron Body, Brass1-inch (DN 25) (3 required) 15A6002X2121-1/2 to 4-inch (DN 25 to 100) (2 required) 15A6002X212

Steel Body (2 required) 15A6002XY72 Stainless Steel Body (2 required) 15A6002X642

72 ElbowCast Iron Body (1 required), Brass 15A6002X172Steel Body (2 required), Steel 15A6002XY52

Stainless Steel Body (2 required) 15A6002X63273 Female Connector, Brass (For 1-1/2, 2, 3

and 4-Inch Cast Iron Construction Only) 15A6002X232

Type 92P (figure 17)Key Description Part Number

Parts Kits (includes keys: 4, 6, 8, and 10)Cast Iron1-inch (DN 25) R92BX0000221-1/2-inch (DN 40) R92BX0000322-inch (DN 50) R92BX0000423-inch (DN 80) R92BX0000624-inch (DN 100) R92BX000072

Steel1-inch (DN 25) R92BX0000921-1/2-inch (DN 40) R92BX0001022-inch (DN 50) R92BX0001123-inch (DN 80) R92BX0000624-inch (DN 100) R92BX000122

1 Valve Body Only,Cast IronNPT1-inch (DN 25) 3H5846190221-1/2-inch (DN 40) 3H2748190122-inch (DN 50) 3F249719022

Class 125FF flanged1-1/2-inch (DN 40) 3H2750190222-inch (DN 50) 3F2498190223-inch (DN 80) 3H3064190224-inch (DN 100) 3H314619022

Class 250RF flanged1-1/2-inch (DN 40) 3H2751190222-inch (DN 50) 3F2499190223-inch (DN 80) 3H3065190224-inch (DN 100) 3H314719022

WCC SteelNPT Screwed1-inch (DN 25) 59B0454X0121-1/2-inch (DN 40) 59B5508X0122-inch (DN 50) 59B0440X012



1 Valve Body Only (continued)Steel (continued)Class 300RF flanged1-inch (DN 25) 59B0456X0121-1/2-inch (DN 40) 59B4697X0122-inch (DN 50) 59B0442X0123-inch (DN 80) 59B0464X0124-inch (DN 100) 59B5805X012

1 Valve Body Assembly (includes body withseat ring - key 8 and guide bushing - key 3)Cast IronNPT1-inch (DN 25) 3H5846000B21-1/2-inch (DN 40) 3H2748000B22-inch (DN 50) 3F2497000B2

Class 125FF flanged1-1/2-inch (DN 40) 3H2750000A22-inch (DN 50) 3F2498000B23-inch (DN 80) 3H3064000A24-inch (DN 100) 3H3146000A2

Class 250RF flanged1-1/2-inch (DN 40) 3H2751000A22-inch (DN 50) 3F2499000B23-inch (DN 80) 3H3065000A24-inch (DN 100) 3H3147000A2

SteelNPT1-inch (DN 25) T20895X00121-1/2-inch (DN 40) T20895X00422-inch (DN 50) T20895X0072



2 Bottom Flange AssemblyCast Iron1-inch (DN 25) 1J3024000A21-1/2-inch (DN 40) 1J3026000A22-inch (DN 50) 1J4339000A23-inch (DN 80) 0U0357000A24-inch (DN 100) 0T0786000A2

WCC Steel1-inch (DN 25) 29B468600A21-1/2-inch (DN 40) 39B551300A22-inch (DN 50) 39B045200A23-inch (DN 80) 39B581200A24-inch (DN 100) 39B642300A2

3 Guide Bushing, 17-4 PH Stainless steel1-inch (DN 25) 1A4091350121-1/2-inch (DN 40) 1A4161350122-inch (DN 50) 1A4192350123-inch (DN 80) 1A4271350124-inch (DN 100) 1A430935012

4(1) GasketCast Iron Body,Composition1-inch (DN 25) 0U0200040221-1/2-inch (DN 40) 0U0247040222-inch (DN 50) 0T0681040223-inch (DN 80) 0U0365040224-inch (DN 100) 0U078804022

Steel Body, Grafoil1-inch (DN 25) 0U0200X00121-1/2-inch (DN 40) 0U0247X00122-inch (DN 50) 0T0681X00123-inch (DN 80) 0U0365X00124-inch (DN 100) 0U0788X0012

Types 92B and 92P

24

Figure 17. Type 92P Assembly30A6955


5 Cap Screw, Plated Steel1-inch (DN 25) (6 required) 1A3369240521-1/2-inch (DN 40) (6 required) 1A3375240522-inch (DN 50) (6 required) 1A4185240523-inch (DN 80) (8 required) 1A3444240524-inch (DN 100) (8 required) 1A430224052

6 Valve Plug, Stainless Steel1-inch (DN 25) 2P9796461721-1/2-inch (DN 40) 2P9797461722-inch (DN 50) 2P9798461723-inch (DN 80) 2P9800461924-inch (DN 100) 3P980146192

7 Spring, Inconel10 to 20 psi (0,69 to 1,4 bar) minimum pressure drop1-inch (DN 25) 0U0202420121-1/2-inch (DN 40) 0U0237420122-inch (DN 50) 0T0860420123-inch (DN 80) 0U0359420124-inch (DN 100) 0T085842012

8(1) Seat Ring, Stainless steel1-inch (DN 25) 2P9803461721-1/2-inch (DN 40) 2P9804461722-inch (DN 50) 2P8967461923-inch (DN 80) 2P8980461924-inch (DN 100) 3P980546192

9 Diaphragm PlateStainless Steel1-inch (DN 25) 1F2515190121-1/2-inch (DN 40) 1F3010190122-inch (DN 50) 1F2504190123-inch (DN 80) 1F3248190124-inch (DN 100) 1F335619012


9 Diaphragm Plate (continued)WCC Steel1-inch (DN 25) 19B4685X0121-1/2-inch (DN 40) 19B5514X0122-inch (DN 50) 29B4681X0123-inch (DN 80) 29B5811X0124-inch (DN 100) 29B4625X012

10(1) Diaphragm, 302 Stainless Steel (2 required)1-inch (DN 25) 1F2514360121-1/2-inch (DN 40) 1F3012360122-inch (DN 50) 1F2503360123-inch (DN 80) 1F3249360124-inch (DN 100) 1F335736012

11 Diaphragm Plate Plug1-inch (DN 25) 1N9346351321-1/2-inch (DN 40) 1L5862351322-inch (DN 50) 1L586535132

11 Travel Stop3-inch (DN 80) 1L5871351324-inch (DN 100) 1P433735132

12 Diaphragm CaseCast Iron1-inch (DN 25) 2L6261191721-1/2-inch (DN 40) 2L5863190122-inch (DN 50) 2L5866190223-inch (DN 80) 2L5872190224-inch (DN 100) 2P433819022

WCC Steel1-inch (DN 25) 39B6439X0121-1/2-inch (DN 40) 39B4700X0122-inch (DN 50) 39B4681X0123-inch (DN 80) 39B5813X0124-inch (DN 100) 49B4621X012


Types 92B and 92P

25

Figure 18. Type 6492HM Pilot Assembly

Types 6492HM and 6492HTM Pilots(figure 18)Key Description Part Number

1 Pilot Valve BodySteel 22A0403X052Stainless Steel 22A0403X072

2 Valve GuideSteel 1E391835132Stainless Steel 1E391835072

3 Valve Spring 1E392437022


4 Inner ValveSteel 1F967446172Stainless Steel 1F9674X0012

5 OrificeSteel 1H564446172Stainless Steel 1H5644X0012

7 Valve StemSteel 1F967835132Stainless Steel 1F9678X0012

8 Bellows RetainerSteel 1F971214012Stainless Steel 1F9712X0012

9 BellowsSteel 1F971318992Stainless Steel 1F9713X0012

10 Diaphragm (2 required) 1E39583601211 Lower Spring Seat

Type 6492HM 1J914008012Type 6492HTM 14B9948X012

12 SpringType 6492HM10 to 30 psig (0,69 to 2,07 bar) 1E39562702225 to 75 psig (1,72 to 5,17 bar) 1D74552714270 to 150 psig (4,83 to 10,3 bar) 1E395727192

Type 6492HTM15 to 100 psig (1,03 to 6,9 bar) 14B9943X01280 to 250 psig (5,52 to 17,2 bar) 14B9942X012

13 Upper Spring SeatType 6492HM 1D667125072Type 6492HTM 14B9951X012

14 Spring CaseSteelwith standard adjusting screw 2L416322012with sealed adjusting screw 2L442022012

Stainless Steelwith standard adjusting screw 2L416333092with sealed adjusting screw 244420X0012

39B3357



13 Cap Screw, Plated Steel1-inch (DN 25) (12 required) 1A4130240521-1/2 and 2-inch (DN 40 and 50) (12 required) 1A4175240523 and 4-inch (DN 80 and 100) (16 required) 1A427824052

14 Hex Nut, Cadmium Plated Steel1-inch (DN 25) (12 required) 1A4132241221-1/2 and 2-inch (DN 40 and 50)(12 required) 1A4176241223 and 4-inch (DN 60, 80, and 100)(16 required) 1A420124122

15 Nameplate, not shown - - - - - - - - - - -16 Drive Screw (2 required) 1A36822898217 Pipe Plug, Steel 1A36922409218 Pipe Bushing 1C37902623219 Pipe Plug, Steel 1A36922409220 Diaphragm Plate

1-1/2-inch (DN 40) 1L5861250322-inch (DN 50) 1L5864250323-inch (DN 80) 1L5870250324-inch (DN 100) 1P433925032

21 Pipe Plug, Not shown (Not for 1-inch body) 1A649528992

Types 92B and 92P

26


15 Set ScrewStandard 1D995448702Handwheel 1J496428982

16 Hex Nut 1A35372412217 Cap Screw (8 required)

Type 6492HMSteel 1A381624052Stainless Steel 1A3816X0152

Type 6492HTMSteel 1A3816X0132Stainless Steel 1A3815X0152

18 Diaphragm GasketType 6492HM 1E396104022Type 6492HTM 1E3961X0012

19 Drive Screw (4 required) 1A36822898220 Nameplate - - - - - - - - - - -34 Machine Screw for use with Handwheel 16A5763X01238 Handwheel 1J49614401239 Lock Washer for use with Handwheel 1A35233299274 Pipe Plug

Steel 0Z020128992Stainless Steel 0Z020135072

77 Screen 16A1512X01287 Sealed Adjusting Screw Sealing Washer 1V20569901294 Pipe Plug 1E82313504295 Warning Label (figure 19) 19B0429X0A2

Figure 19. Safety Override Pilot Warning Label (key 95)

WARNING BACKGROUNDSAFETY ORANGE ANSI Z535.1

3.00(76)

0.75(19)

E0661

Type 6492HM Pilot Mounting Parts(figure 20)Key Description Part Number

22 Pipe Nipple1 or 1-1/2- inch main valveSteel 1A473526012Stainless Steel 1A4735X0012

2, 3 or 4- inch main valveSteel 1K279426012Stainless Steel 1K2794X0012

65 Loading Tubing 0500103809W66 Pipe Bushing

Steel 1C379026232Stainless Steel 1C3790X0012

71 Connector (2 required)Steel 15A6002XY72Stainless Steel 15A6002X642

72 Elbow (2 required)Steel 15A6002XY52Stainless Steel 15A6002X632

78 Pipe Nipple (2 required)Steel 1C559926232Stainless Steel 1C5599X0012


Types 92B and 92P

27

Figure 20. Safety Override Pilot Assembly

Types 92B and 92P

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