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Type 310A
D102
068X
012
Instruction ManualForm 5351
September 2001
www.FISHERregulators.com
Figure 1. Type 310A Regulator with Type 32A Pilot
W6278
Introduction
Scope of ManualThis manual provides installation, maintenance, andparts ordering information for the Type 310A-32A pilot-operated, pressure reducing regulator and theType 310A-32A-32A working monitor regulator. Informa-tion on equipment used with this regulator is found inseparate manuals.
DescriptionThe Type 310A-32A pilot-operated, pressure reducingregulator includes a single Type 32A pilot mounted onthe Type 310A main valve for pressure reducing orwide-open monitoring applications.
The Type 310A-32A-32A working monitor regulatorincludes Type 310A regulator which functions as thefirst-stage regulator in the working monitor situations bytaking the initial pressure reduction and two Type 32Apilots which serve as the monitoring and working pilots.
SpecificationsRatings and specifications for the Type 310A configura-tions are listed in the Specifications section on page 2.Some specifications for a specific regulator arestamped on a nameplate attached to the pilot springcase (key 1, figure 9).
Type 310A-32A Pressure Reducing Regulator andType 310A-32A-32A Working Monitor Regulator
Type 310A
2
Available ConfigurationsType 310A-32A: Type 310A main valve with oneType 32A pilot for standard pressure-reducing andwide-open monitoring applicationsType 310A-32A-32A: Type 310A main valve withtwo Type 32A pilots for working monitor applications
Body Size and End Connection Style1-inch (DN 25) body with NPT ends; and 2, 3, 4, or4 x 6-inch (DN 50, 80, 100, and 100 x 150) bodywith ANSI Class 300 RF or 600 RF flanged ends
Maximum Inlet and Pilot Supply Pressures(1)
NPT and Class 600 RF: 1480 psig (102 bar)Class 300 RF: 740 psig (51 bar)
Maximum Pressure Drop(1)
NPT and Class 600 RF: 1425 psig (98,3 bar)Class 300 RF: 720 psig (49,6 bar)
Maximum Outlet Pressure(1)
Operating: 750 psig (51,7 bar)To Avoid Internal Part Damage: 800 psig (55,2 bar)Exceeding this pressure may result in gas ventingfrom pilot spring case.Emergency (Casing): 1480 psig (102 bar) ormaximum inlet pressure whichever is lower.
1. The pressure/temperature limits in this instruction manual or any applicable standard limitation should not be exceeded.2. Polyurethane wiper ring limits fluoroelastomer parts to 200F (93C) maximum temperature. To obtain temperature of 300F (149C), wiper ring must be removed.
Specifications
Outlet Pressure Ranges and Proportional BandsSee table 1
Minimum Differential Pressure(1)15 psig (1,0 bar)
Maximum TravelSee table 3
External Pilot Supply and Pilot Vent Connections1/4-inch NPT
Maximum Temperature Capabilities(1)
Nitrile (NBR) with wiper ring:20 to 150F (29 to 66C)Fluoroelastomer (FKM) with wiper ring:0 to 200F (18 to 93C)Fluoroelastomer (FKM) without wiper ring(2):0 to 300F (18 to 149C)
Options Main valve body without pilot for on-off service Remote-mounted pilot Electrically controlled pilot using Type 662 Kixcel Travel indicator Pressure loaded pilot Type 252 pilot supply filter Backpressure protection system Restricted Trim (30%, 50%, or 70%) NACE construction Inlet tap
,EGNARERUSSERPTELTUO(GISP rab )
GNIRPSROLOC
GNIRPSREBMUNTRAP
GNIROTINOMHCIHWTAERUSSERPMUMINIM(GISP,TESEBNACTOLIP rab )
02ot01 )4,1ot96,0( revliS 220726908D1 erusserpnoitubirtsidlamronrevo)12,0(0.3
001ot01 )9,6ot96,0( wolleY 220725293E1 erusserpnoitubirtsidlamronrevo)43,0(0.5
052ot001 )2,71ot9,6( eulB 220722783D1 erusserpnoitubirtsidlamronrevo)96,0(01
006ot052 )4,14ot2,71( deR 241721564D1 erusserpnoitubirtsidlamronrevo)0,1(51
057ot004 )7,15ot6,72( neerG 210X3455A31 erusserpnoitubirtsidlamronrevo)4,1(02
Table 2. Recommended Minimum Differential Between Monitoring Pilot Setting and Distribution Pressure
Table 1. Outlet Pressure Ranges
(GISP,EGNARERUSSERPTELTUO rab ) (GISP,DNABLANOITROPORP rab ) ROLOCGNIRPS REBMUNTRAPGNIRPS02ot01 )4,1ot96,0( 5.0 )30,0( revliS 220726908D1
001ot01 )9,6ot96,0( 2 )41,0( wolleY 220725293E1
052ot001 )2,71ot9,6( 5 )43,0( eulB 220722783D1
006ot052 )4,14ot2,71( 21 )38,0( deR 241721564D1
057ot004 )7,15ot6,72( )1( 02 )4,1( neerG 210X3455A31.ylnomgarhpaidtolipelirtinhtiwelbaliavA.1
Type 310A
3
When gas demand in the downstream system has beensatisfied, the outlet pressure tends to increase. Theincreased outlet pressure acting on the bottom dia-phragm of the diaphragm plate and yoke assemblyresults in a force that overcomes the pilot spring settingand forces the assembly toward the relay seat, closing it.The loading pressure acting on the main valve diaphragmbleeds to the downstream system through the fixedrestriction in the diaphragm plate and yoke assembly.When rapid main valve closure is required by unusualcontrol conditions, the bleed valve opens for increasedbleed rate. The force of increased outlet pressure actingon the main valve diaphragm plus the main valve springforce overcomes the force of decreased loading pressureacting on the main valve diaphragm and moves thethrottling sleeve toward the stationary valve plug todecrease the gas flow to the downstream system.
The top diaphragm in the pilot acts as a sealing mem-ber for the loading chamber and as a balancing memberto the bottom diaphragm. The two diaphragms areconnected by a machine yoke. Pressure change to thecenter chamber has little effect on the positioning of thevalve disk.
INLET PRESSURE
OUTLET PRESSURE
LOADING PRESSURE
PILOT SUPPLY PRESSURE
PILOT DIAPHRAGM PLATEAND YOKE ASSEMBLY
BLEED VALVE
FIXEDRESTRICTION
BOTTOMDIAPHRAGM
MAIN VALVE DIAPHRAGM
THROTTLING SLEEVE
MAIN VALVE SPRING
RELAY SEAT
TOP DIAPHRAGM
PILOT CONTROLSPRING
STATIONARYVALVE PLUG
E0696
Principle of Operation
Single-Pilot Regulator (figure 2)The regulator inlet pressure enters the pilot through theexternal pilot supply line and is utilized as the supplypressure for the pilot. The setting of the pilot controlspring determines the reduced outlet (downstream)pressure.
In operation, assume the outlet pressure is less thanthe setting of the pilot control spring. Pilot controlspring force then overcomes the force resulting fromoutlet pressure acting on the bottom diaphragm. Thespring pushes the diaphragm plate and yoke assemblyaway from the relay seat, opening it and supplingadditional loading pressure to the main valve dia-phragm. When this additional loading pressure exceedsthe force resulting from outlet pressure acting on themain valve diaphragm plus the force of the main valvespring, the diaphragm is pushed away from the station-ary valve plug. The throttling sleeve opens wider, andthe required gas is supplied to the downstream system.
Figure 2. Type 310A-32A Regulator Principle of Operation
Type 310A
4
INLET PRESSURE
OUTLET PRESSURE
LOADING PRESSURE
PILOT SUPPLY PRESSURE
INTERMEDIATE PRESSURE
ATMOSPHERIC PRESSURE
WORKING PILOT
PLUG
RESTRICTION
SPACER
PLUG
MONITORING PILOTE0693
Monitor Systems
Wide-Open Monitors (figure 4)Monitoring regulators serve as overpressure protectiondevices to limit system pressure in the event of failureof working regulators feeding the system. The controlline of a wide-open monitoring regulator may be con-nected downstream of the working regulator, so thatduring normal operation the wide-open monitoringregulator is standing wide open with the pressurereduction being taken across the working regulator.Only in case of working regulator failure does the wide-open monitoring regulator function.
Working Monitors (figure 5)The Type 310A-32A-32A differs from wide-open moni-tors in that it has working monitor capability. Thismeans that it normally reduces pressure and throttleswhile the second-stage regulator is in operation. Shouldthe second-stage working regulator fail open, theType 310A-32A-32A will take over the entire pressurereduction function.
The working monitor pilots are adaptations of twoType 32A pilots with special internal parts, due to thepressure conditions in this piloting system. A spacerblocks open the differential regulator portion of theType 32A monitoring pilot. A plug in both the working
Figure 3. Type 310A-32A-32A Working Monitor Regulator Principle of Operation
Type 310A
5
and monitoring pilots makes the internal bleed nonfunc-tional. A restriction placed in the external tubing be-tween the diaphragm loading pressure and the interme-diate pressure acts as a downstream bleed.
If the second-stage working regulator fails open, thedistribution pressure increases to the setting of theType 32A monitoring pilot (slightly higher than theoriginal distribution pressure) and is controlled at thatlevel by the Type 310A-32A-32A. Thus, downstreamequipment is protected against a major overpressurecondition without disrupting service or venting gas toatmosphere.
In the working pilot, the inlet pressure is reduced to apre-determined pilot supply pressure, which is furtherreduced to loading pressure for the Type 310A dia-phragm. The loading pressure is piped through theportion of the monitoring pilot blocked open by thespacer and, as long as distribution pressure is belowthe setting of the monitoring pilot, passes through therelay orifice of the monitoring pilot to the diaphragmcase of the Type 310A body.
Distribution pressure is piped back to the monitoringpilot. As long as the distribution pressure is less than themonitoring pilot setting, the working pilot controls theType 310A to maintain intermediate pressure. If the
distribution pressure increases to the monitoring pilotsetting, the monitoring pilot relay orifice starts to throttlethe loading pressure to the Type 310A diaphragm. Thisallows the Type 310A main spring to move the throttlingsleeve closer to the seat and control distribution pres-sure at the monitoring pilot set point. Therefore, failure ofthe second-stage working regulator is controlled with onlya slight increase in distribution pressure, with the Type310A-32A-32A accomplishing the entire pressurereduction function.
Installation and Startup
Personal injury or equipment damage,due to bursting of pressure-containingparts may result if this regulator isoverpressured or is installed whereservice conditions could exceed thelimits given in the Specification sectionand on the appropriate nameplate, orwhere conditions exceed any rating of theadjacent piping or piping connections.To avoid such injury or damage, providepressure-relieving or pressure-limitingdevices to prevent service conditionsfrom exceeding those limits. Also, checkthat the installation is in compliance withall applicable codes and regulations.
Additionally, physical damage to theregulator could break the pilot off themain valve, causing personal injury andproperty damage due to bursting ofpressure-containing parts. To avoid suchinjury and damage, install the regulator ina safe location.
Figure 4. Wide-Open Monitor System Figure 5. Working Monitor System
)ND(SEHCNI,EZISYDOB (HCNI,LEVARTMUMIXAM mm ))52(1 5.0 )31(
)05(2 578.0 )22(
)08(3 1 )52(
)001(4 521.1 )92(
)051x001(6x4 5.1 )83(
Table 3. Maximum Travel
E0694E0695
Type 310A
6
Single Pilot RegulatorInstallationA Type 310A-32A regulator bleeds no gas to atmo-sphere during normal operation, thus making theregulator suitable for installation in pits and otherenclosed locations without elaborate venting systems.This regulator also can be installed in pits subject toflooding by venting the pilot spring case above theexpected flood level so that the pilot setting can bereferenced to atmospheric pressure.
1. Use qualified personnel when installing, maintain-ing, or operating this regulator. Inspect the regulatorand the pipeline to be certain both are free of foreignmaterials.
2. Install the regulator so that the flow arrow cast onthe main valve matches the flow direction of processfluid through the regulator.
3. Apply pipe compound to the male pipeline threadsbefore installing a regulator with screwed end connec-tions. Use gaskets between pipeline and regulatorflanges when installing a regulator with flanged endconnections.
A regulator may vent some gas to theatmosphere. In hazardous or flammable
gas service, vented gas may accumulate,causing personal injury, death, or prop-erty damage due to bursting of pressure-retaining parts. Vent a regulator inhazardous gas service to a remote, safelocation away from air intakes or anyhazardous location. The vent line orstack opening must be protected againstcondensation or clogging.
4. A Type 32A pilot has a 1/4-inch NPT screwed ventconnection in the spring case. To remotely vent gasfrom the spring case, remove the screened vent, andconnect 1/4-inch piping or tubing to the spring caseconnection. The piping or tubing should vent to a safelocation, have as few elbows as possible, and have ascreened vent on its exhaust. Install the regulator andany remote vent piping or tubing so that the vent isprotected from condensation, freezing, or any sub-stance that could clog it.
5. Connect a pilot supply line from the upstreampiping to the 1/4-inch NPT pilot inlet.
6. Connect a downstream control line to a straightrun of pipe 6 to 10 pipe diameters from the regulatoroutlet as shown in figure 6. If such a distance is notpractical, connect the control line away from elbows,swages, nipples, or any area where abnormal flowvelocities occur.
7. Install a hand valve in the control line.
Figure 6. Typical Pressure Reducing Installation
VENT VALVE E
BLOCK VALVE
HAND VALVE A
1/4-INCH NPT PILOTSUPPLY CONECTION
BYPASS VALVE
BYPASS LINE
VENT VALVE C
LOADING TUBING
HAND VALVE BBLOCK VALVE
ALTERNATEDOWNSTREAMCONTROL LINE TAP
LOCATE 6 TO 10 PIPEDIAMETERS FROMVALVE OUTLET
1/2-INCH DOWNSTREAMCONTROL LINE
VENT VALVE D
24B4134B2444
Type 310A
7
8. Install the other end of the downstream controlline to the 1/2-inch NPT connection in either side of thecase body (key 1, figure 10 or 11).
9. Consult the appropriate instruction manual forinstallation of an optional pneumatic or electric remotecontrol-drive unit. For optional remote pneumatic loadingof a Type 32A pilot, make the spring case piping connec-tions just as they would be made for remote venting.
Prestartup ConsiderationsEach regulator is factory-set for the outlet pressurespecified on the order. If no setting was specified,outlet pressure was factory-set at the mid-range of thepilot control spring. Before beginning the startupprocedure in this section, make sure the followingconditions are in effect:
Block valves isolate the regulator
Vent valves are closed
A bypass, if any, is in operation
In all cases, check the control spring setting to makesure it is correct for the application.
Pilot supply pressure must be introducedinto the regulator before introduction ofany downstream pressure, or internaldamage may occur due to reverse pres-surization of the pilot and main valvecomponents.
Pressure gauges should always be usedto monitor downstream pressure duringstartup. Procedures used in putting thisregulator into operation must be plannedaccordingly if the downstream system ispressurized by another regulator or by amanual bypass.
Note
Pilot supply pressure must be at least 15psig (1,0 bar) greater than control pressureto operate the regulator at rated travel.
Although remote loading or control constructions mayrequire separate adjustments on associated equipment,the only adjustment normally necessary on a
Type 310A-32A regulator is the pressure setting of thepilot control spring. Turning the adjusting screw clock-wise into the spring case increases the spring compres-sion and pressure setting. Turning the adjusting screwcounterclockwise decreases the spring compressionand pressure setting.
Pilot AdjustmentTo adjust a standard Type 32A pilot, loosen the locknut(key 4, figure 9), and turn the adjusting screw (key 3,figure 9). Then tighten the locknut to maintain theadjustment position.
Startup1. Open the upstream block (isolating) valve. Open
hand valve A in the external pilot supply line beforeopening the downstream isolating valve (see figure 6).
2. Open the downstream block (isolating) valve forminimum flow.
3. Slowly open hand valve B in the downstreamcontrol line, while at the same time adjusting the pilotsetting, if necessary.
4. Completely open the downstream block valve.
5. Slowly close the bypass valve, if any.
Wide-Open Monitor Regulator
Installation1. For both the wide-open monitoring regulator and
the working regulator, perform the Single-Pilot RegulatorInstallation procedures through step 9.
2. Connect the control line of a wide-open monitoringregulator (figure 7) to downstream piping near theworking regulator control line connection. During normaloperation the wide-open monitoring regulator standswide open with the pressure reduction being takenacross the working regulator. Only in case of workingregulator failure does the wide-open monitoring regulatortake control at its slightly higher setting.
Prestartup ConsiderationsEach regulator is factory-set for the outlet pressurespecified on the order. If no setting was specified,outlet pressure was factory-set at the mid-range of thepilot control spring. Before beginning the startup
Type 310A
8
procedures in this section, make sure the followingconditions are in effect:
Block valves isolate the regulator Vent valves are closed Hand valves are closed A bypass, if any, is in operation
In all cases, check the control spring setting to makesure it is correct for the application.
Introduce pilot supply pressure into theregulator before introducing any down-stream pressure, or internal damage mayoccur due to reverse pressurization of thepilot and main valve components.
Always use pressure gauges to monitordownstream pressure during startup. Ifthe downstream is pressurized by an-other regulator, plan startup proceduresaccordingly.
Note
Pilot supply pressure must exceedcontrol pressure by at least 15 psig(1,0 bar) in order to operate the regulatorat rated travel.
Although remote loading or control constructions mayrequire separate adjustments on associated equipment,the only adjustment normally necessary on aType 310A-32A regulator is the pressure setting of thepilot control spring. Turning the adjusting screw clock-
wise into the spring case increases the spring compres-sion and pressure setting. Turning the adjusting screwcounterclockwise decreases the spring compressionand pressure setting.
Pilot AdjustmentTo adjust a standard Type 32A pilot, loosen the locknut(key 4, figure 9), and turn the adjusting screw (key 3,figure 9). Then tighten the locknut to maintain theadjustment position.
StartupThis procedure is to be repeated in turn for eachregulator in the installation.
1. Slowly open the hand valve in the pilot supply line.
2. Slowly open the upstream block (isolating) valveand partially open the downstream block valve forminimum flow.
3. Slowly open the hand valve in the control linewhile, at the same time, adjusting the pilot setting ifnecessary.
4. Completely open the downstream block valve.
5. Slowly close the bypass valve, if any.
Working Monitor Regulator
InstallationAll Type 310A-32A-32A working monitor regulators arebench set at the factory according to the service condi-
Figure 7. Typical Wide-Open Monitor Installation
MINIMUM PIPING WIDE-OPEN MONITOR ARRANGEMENT THATREQUIRES WIDE-OPEN MONITOR ALWAYS TO BE
UPSTREAM OF WORKING REGULATOR
FLEXIBLE WIDE-OPEN MONITOR ARRANGEMENT THAT PERMITSWIDE-OPEN MONITOR TO BE EITHER UPSTREAM OR
DOWNSTREAM OF THE WORKING REGULATOR
24B4134B2445_2
Type 310A
9
tions specified on the customers order. Examine the uniton arrival to make sure no damage has occurred inshipment. Clean and blow out pipelines to be sure nowelding slag or other foreign material is present.
Install the Type 310A-32A-32A into the pipeline usingadequate gaskets for flanged regulator units and goodpiping technique. Be sure to provide suitable pressuregauges where appropriate, block valves, bypass valvesand piping, and bleed valves to permit safe and easymaintenance of both the working monitor regulator andthe second-stage working regulator. Be sure flow will bein the direction indicated by the arrow cast on the body
Refer to the figure 8 schematic and figure 14, andproceed in the following steps.
1. Attach the intermediate pressure control line(1/2-inch NPT pipe) between the 1/2-inch NPT pipe tee(key 60, figure 14) and the intermediate pressureportion of the downstream piping. Install hand valve Bin this line.
2. Connect 1/2-inch NPT distribution pressure controlline piping between the 1/2-inch NPT connection in themounting bracket (key 72, figure 14) and the pipelinedownstream of the second-stage working regulator.Include hand valve A in this control line.
Note
Each pilot has a nameplate identifying itas the working or monitor pilot.
3. Pipe the pilot supply line to 1/4-inch NPT connec-tion in the back of the working pilot body. Supplypressure should be filtered if excess dirt or condensateis present in the supply gas.
4. Install downstream working regulator per guide-lines.
Startup1. Before introducing any pressure to the unit, close
hand valve A in the distribution pressure control line andhand valve B in the intermediate pressure control line.
Pilot supply pressure must be introducedinto the regulator prior to introduction ofany downstream pressure or internaldamage may occur due to reverse pres-surization of the pilot and main valvecomponents. Pilot supply pressure mustbe at least 15 psi (1,0 bar) greater thancontrol pressure for proper operation.
2. Slowly open the hand valve in the pilot supply line.
3. Slowly open the upstream block valve and partiallyopen the downstream block valve for minimum flow.
4. Slowly open hand valve B and allow the intermedi-ate pressure to increase to the working pilot setting.
5. Put the second-stage working regulator intooperation according to recommended procedures andinstructions furnished with the second-stage workingregulator.
6. After the distribution pressure has been estab-lished slowly open hand valve A.
Figure 8. Typical Working Monitor Installation
A0714_2
HAND VALVE B
HAND VALVE A
WORKING PILOT
MONITORINGPILOT
INTERMEDIATE PRESSURE DISTRIBUTION PRESSURE
Type 310A
10
Pilot AdjustmentThe second-stage working regulator must be set tooperate at a lower pressure than the monitoring pilot orthe monitoring pilot will try to take control of the distri-bution pressure. Follow the steps listed to obtain thedesired results.
1. Increase the setting of the monitoring pilot byloosening the locknut (key 4, figure 9) and turning theadjusting screw (key 3, figure 9) clockwise (into thespring case cap, key 2, figure 9) until the working pilotis in control of the intermediate pressure and thesecond-stage working regulator is in control of thedistribution pressure.
2. Adjust the setting of the working pilot by loosen-ing the jam nut and turning the adjusting screw clock-wise (into the spring case cap) to increase the interme-diate pressure, or counterclockwise (out of the springcase cap) to reduce the intermediate pressure. Adjustuntil desired intermediate pressure is reached.
3. Adjust the second-stage working regulator to thedesired distribution pressure by following instructionsfor that particular regulator.
4. Adjust the setting of the monitoring pilot toestablish the desired emergency distribution pressure,which is to be maintained in the event of failure of thesecond-stage working regulator. The steps followed mayvary with each piping situation. The basic methodremains the same.
The following procedure serves as an example whichcan be used or modified to make monitoring pilotadjustments in any installation.
Increase the outlet pressure setting of the second-stage working regulator until the monitoring pilot takescontrol of the distribution pressure. Adjust the monitor-ing pilot setting until the desired emergency distributionpressure is achieved. Refer to table 2 for the recom-mended minimum differential between the monitoringpilot setting and the desired distribution pressure.
With settings as desired on both the monitoring and theworking pilots, tighten the locknuts (key 4, figure 9) tomaintain proper adjustment screw positions. Then re-adjust the second-stage working regulator to thedesired distribution pressure.
ShutdownIn any installation it is important to slowly open andclose the valves and to vent the outlet pressure beforeventing the inlet pressure to prevent damage caused byreverse pressurization of the pilot or main valve.
Single Pilot Regulators and Wide-OpenMonitor RegulatorsAs well as applying to a single-pilot regulator (figure 6),the steps in this procedure also are valid for a wide-open monitoring installation (figure 7) and should berepeated for each regulator in such an installation.
1. Close the upstream isolating valve.
2. Close block valve A (figure 6) in the supply line.
3. Close the downstream isolating valve.
4. If the downstream control line taps into thepipeline above the downstream isolating valve, openvent valve C between the regulator and the downstreamisolating valve. Permit all pressure to bleed out of theregulator.
If the downstream control line taps into the pipelinebelow the downstream isolating valve, close handvalve B. Then open vent valve C and vent valve D,permitting all pressure to bleed out of the regulator.
5. Open vent valve E to release any inlet pressurethat may be trapped in the regulator.
Working Monitor Regulators1. Close the upstream isolating valve.
2. Close hand valve in pilot supply line.
3. Close the downstream isolating valve.
4. Open a bleed valve between the second-stageworking regulator and the downstream isolating valve.Permit all pressure to bleed out of the working monitorregulator and the second-stage working regulator.
5. Open vent valve to vent any intermediate pres-sure trapped in the system.
6. Open vent valve to release any inlet pressuretrapped in the regulator.
Type 310A
11
MaintenanceThe regulator parts are subject to normal wear and mustbe inspected periodically and replaced as necessary.The frequency of inspection and replacement dependson the severity of service conditions and on applicablefederal, state and local codes and regulations.
To avoid personal injury or propertydamage from sudden release of pressure,isolate the regulator from the pressuresystem, and release all pressure from thepilot and main valve before performingmaintenance operations.
Type 32A PilotsThis procedure describes how the pilot can be com-pletely disassembled and assembled. When inspectionor repairs are required, disassemble only those partsnecessary to accomplish the job. Refer to figures 9 and14 for key numbers.
DisassemblyThe pilot may remain on the main valve for steps 1through 7; however, it must be removed for steps 8through 15.
1. Remove the piston seat assembly (key 28) fromthe piston guide (key 23).
2. Remove the piston guide (key 23) from the pilotbody (key 22).
3. Check the O-rings (keys 25 and 26), and replaceif worn or damaged.
4. Check the nylon disk in the piston seat assembly,and replace this assembly if worn or damaged.
5. Remove the retaining ring (key 27), and lift out thepiston and spring (keys 29 and 36). On working monitorregulators, remove the working pilot spring (key 36) orthe monitoring pilot spacer (key 53, figure 14).
6. Inspect the valve seating surface on the smallend of the piston for nicks and scratches.
7. Use a wire with a hooked end to remove the pistonguide bushing O-ring (key 34). Check the O-rings(keys 30 and 34), and replace if worn or damaged.
8. Disconnect the loading tubing and the externalsupply line from the pilot (figure 2); and remove the pilotfrom the main valve.
9. Release control spring compression by looseningthe locknut (key 4) and backing out the adjusting screw(key 3).
10. To inspect or replace the control spring (key 37),Unscrew spring case cap (key 2) and remove thecontrol spring and spring seats (key 5).
11. Unscrew the cap screws (key 6), and remove thespring case (key 1).
12. As one unit, remove the diaphragm spacer(key 11), yoke (key 16), relay seat assembly (key 12),adaptor (key 17), and valve disk assembly (key 18).
13. Slide out the relay seat assembly (key 12), andinspect the O-rings (key 14). Discard the O-rings ifworn or damaged. Also, inspect the seating surface fornicks and scratches, and replace if necessary.
14. Push the yoke (key 16) and attached parts(keys 9, 8, 15, 10, 18, 17, 19, 20, 35, and 21) throughthe diaphragm spacer (key 11).
15. Unscrew the adaptor (key 17) from the yoke(key 16). Unscrew the bleed valve (key 20).
On Single Pilot Regulators and Wide-Open MonitorRegulators, remove the bleed valve seat (key 19), thespring (key 35), and the valve disk (key 18). Checkthat the holes drilled in the side of the bleed valve seatand the adaptor are both clean and unplugged.
On Working Monitor Regulators, make sure the plug(key 52, figure 14) is firmly in place.
16. Unscrew the cap nut and nut (key 10 and 21),remove the diaphragm plates (key 8) and washers(key 15), and inspect the diaphragms (key 9).
Note
The edges of the diaphragms can beexpected to curl up. They will flatten outwithin a few minutes depending on thetemperature. Warming them will help, butdo not exceed 150F (66C).
AssemblyIt is recommended that new diaphragms and O-rings beinstalled during assembly. If these parts are to bereused, be sure that they are carefully inspected andthat no damage has occurred. Lubricate all O-rings.
Type 310A
12
1. Place the O-ring (key 34) in the piston guide(key 23).
2. Install the O-rings (keys 25 and 26) on the pistonguide.
3. Install the O-ring (key 30) on the piston (key 29).
4. On single pilot regulators and wide-openmonitor regulators, place the spring (key 36) in thepiston guide (key 23). Install the piston, and securewith the retaining ring (key 27). On working monitorregulators, place the spring (key 36 - working pilot) orspacer (key 53 - monitoring pilot) in the piston guide.Install the piston and secure it in the piston guide withthe retaining ring (key 27).
5. Install the O-ring (key 13) on the piston seatassembly (key 28), and screw the assembly into thepiston guide.
6. Install the piston guide in the pilot body (key 22).
7. Insert the bleed valve (key 20) through the bleedvalve seat (key 19).
8. Install the spring (key 35) and valve disk assem-bly (key 18) onto the bleed valve (key 20).
Be sure the bleed valve seat is centeredin the yoke while installing the adaptor.
9. Place the above assembly in the yoke (key 16),and screw on the adaptor (key 17).
Each diaphragm (key 9) has one sidecoated with rubber. Install the dia-phragms so that the rubber sides faceeach other. If the diaphragms are in-stalled any other way, the pilot will notwork properly.
10. Place the diaphragm (key 9), diaphragm plate(key 8), and sealing washer (key 15) on the yoke, andsecure with the cap nut (key 10).
11. Place the other diaphragm, diaphragm plate, andsealing washer on the adaptor, and secure with thenut (key 21).
12. Insert this entire assembly through the diaphragmspacer (key 11) until the outer edges of both dia-phragms are in place on the spacer.
13. Fit the O-rings (key 14) on the relay seat assem-bly (key 12).
14. Rotate the yoke to receive the relay seat assembly.
15. Place entire assembly on the pilot body (key 22).
To avoid crushing the diaphragm, do notexceed the torque specified in step 16.
16. Apply lubricant to cap screws (key 6). Insert thecap screws in the spring case (key 1) and pilot body,and tighten the cap screws to 25 to 30 foot-pounds(34 to 41 Nm).
17. If removed, install the spring seats (key 5) andthe control spring (key 37).
18. Install the cover gasket (key 7), spring case cap(key 2), adjusting screw (key 3), and lock nut (key 4).
19. Install the pilot into the main valve using the pipenipple (not shown).
20. Connect the loading tubing from the male elbowon the case body (key 2, figure 14) to the connector onthe side of the pilot. Refer to figure 1 for the assembledlocation of the tubing, elbow, and connector.
Type 310A Main ValveThis procedure describes how to completely disas-semble and assemble a main valve. When inspectionor repairs are required, disassemble only those partsnecessary to accomplish the job; then start the assem-bly at the appropriate step. Key numbers are refer-enced in figures 10 and 11.
Disassembly1. Disconnect the loading tubing from the connection
in the base body (key 2). Disconnect the downstreampressure control line from the connection in the casebody (key 1) and the external supply line from the pilot.
2. Remove the main valve from the pipeline.
3. Remove the cap screws (key 14), and separatethe case body (key 1) from the base body (key 2).
Note
If a body gasket (key 29) is not present,one must be installed when a new dia-
Type 310A
13
phragm is installed. Also, if the soft seatinside the sleeve (key 3) is damaged, thesleeve (key 3), washer or O-ring (key 11),disk retainer (key 12), disk (key 27), anddisk holder (key 28) need to be replaced.
4. Slide the sleeve and diaphragm assembly out ofthe case body (key 1).
5. Inspect the seating area of the sleeve for nicksand erosion damage. Inspect the diaphragm (key 6) fordamage.
6. Remove the cap screw (key 10), disk retainer(key 12), disk holder (key 28), O-ring or washer(key 11). Examine the disk and O-ring or washer forevidence of damage or wear.
Note
If the regulator has restricted capacitytrim, the percentage of full capacity willbe stamped on the outside of the diskretainer. If this is done, the changeshould be noted on the nameplate toavoid confusion.
7. If either the sleeve or diaphragm must be re-placed, remove the screws (key 13) and diaphragmplate (key 4). Remove the split ring (key 7), and slidethe lower diaphragm plate (key 5) off the sleeve. Thisalso exposes the O-ring (key 9) in the lower diaphragmplate for inspection.
AssemblyBefore assembly, be sure all parts are clean. Duringassembly, lubricate all O-rings and both diaphragmbeads with a high quality lubricant. Be certain the TFEbackup rings (key 26) are properly installed in theO-ring grooves in the base body (key 2) and the casebody (key 1).
1. Inspect the O-rings (key 9), and TFE backup rings(key 26) in the base body (key 2). If damaged, replacewith new parts.
2. Inspect the O-ring (key 9), backup rings (key 26),and wiper ring (key 19) in the case body (key 1).Replace with new parts if wear or damage is noted.The wiper ring will not be present in units designed forhigh temperatures.
3. Inspect the O-ring (key 9) in the lower diaphragmplate (key 5). If damaged, install a new O-ring.
4. Place the split ring (key 7) on the sleeve (key 3),and insert the sleeve in the lower diaphragm plate.
If the diaphragm in the following step isinstalled with the wrong side against thelower diaphragm plate, the beads becomedistorted and the main valve will not shutoff properly.
5. Lubricate both diaphragm beads to facilitateassembly and sealing of the diaphragm (key 6). Placethe inner bead of the diaphragm on the lower dia-phragm plate with the side marked SPRING SIDEagainst the lower diaphragm plate. Add the upperdiaphragm plate (key 4), and install the screws (key13), tighten them down evenly. Be sure the inner beadof the diaphragm does not partially slip out frombetween the plates.
6. Fold the diaphragm down around the lower dia-phragm plate.
7. Fit the disk (key 27) into the disk holder (key 28).Install the disk retainer (key 12) on top of the disk,being sure the leading edge of the disk is properlypositioned around the outside of the retainer and is notpinched under the retainer. Place the O-ring or washer(key 11) on the subassembly and install in the basebody (key 2). Secure with the cap screw (key 10).
8. On units with travel indicator, fit one edge of theflanged head of the travel indicator rod (key 15) into thegroove in the diaphragm plate (key 4) and slide theentire assembly into the base body (key 2), being surethe travel indicator rod is properly oriented so it entersand extends through the hole in the base body and isvisible through the travel indicator cover (key 20).Check to make sure indicator rod is still engaged in thediaphragm plate groove.
9. Lubricate the body gasket (key 29) and the gasketsurface of the base body (key 2), place the bodygasket (key 29) on the base body. Then fit the dia-phragm bead over the machined nose of the base body.
10. Place the spring (key 8) in the lower diaphragmplate. On units with travel indicator, orient the casebody so that the pilot mounting bracket (key 45) is inline with the travel indicator.
11. Fasten the two body halves together with the capscrews (key 14), and tighten hand tight. Lubricating thethreads will make proper tightening easier.
Type 310A
14
Overtightening the cap screws in step 12can damage the diaphragm. Do notexceed the torque value listed in table 4when tightening the cap screws.
12. Alternately tighten the cap screws on oppositesides of the unit to evenly compress the gasket. Followthis sequence several times until the cap screws will notturn at the maximum torque given in table 5. If thisprocedure is properly followed, the gap between the twobody halves will be uniform all the way around.
13. Connect the external supply line to the pilot.
Parts OrderingEach Type 310A regulator is assigned a serial number,which can be found on the nameplate. Refer to thenumber when contacting your Fisher Sales Office orSales Representative for technical information or whenordering parts. When ordering parts, also be sure toinclude the complete 11-character part number from thefollowing Parts List.
Parts List
Type 32A Pilot (figure 9)Key Description Part Number
Repair Kits (Include keys 7, 9, 13, 14, 15, 18, 25, 26,28, 30, and 34)With nitrile disk and O-rings R32AX000012With fluoroelastomer disk and O-rings R32AX000022
1 Spring Case, steel 2R7422220122 Spring Case Cap, steel 11A8122X012
Key Description Part Number
3 Adjusting Screw, plated steelStandard mounting 1D995448702Type 662 Kixcel mounting 18B3500X062
4 Locknut, plated steel 1H4833241225 Spring Seat, steel (2 required) 1R7425240926 Cap Screw, plated steel (4 required) 1B1393241527* Gasket, composition 1R7426040228 Diaphragm Plate, plated steel (2 required) 1R7427241529* Diaphragm (2 required)
Nitrile/Dacron (standard) 1R742806992Fluoroelastomer 1U448302462
10 Cap Nut, stainless steel 1D65153899211 Diaphragm Spacer
Steel (standard) 2R742924092(NACE) 2R7429X0052
12 Orifice Assembly416 stainless steel (standard) 1R7430000A2(NACE) 1R7430X0022
13*(1) O-ringNitrile (standard) 1D687506992Fluoroelastomer 1N430406382
14*(1) O-ring (2 required)Nitrile (standard) 1E216306992Fluoroelastomer 1L949306382
15* Washer, plated steel withbonded synthetic rubber (2 required) 1J186999012
16 Yoke416 stainless steel (standard) 1R743335132(NACE) 1R7433X0012
17 Adaptor416 stainless steel (standard) 1R743435132(NACE) 1R7434X0012
18* Valve Disk Assembly416 stainless steel/nitrile (standard)(1) 10A4912X032416 stainless steel/fluoroelastomer(1) 10A4912X012416 stainless steel/fluoroelastomerw/TFE disk 12A3962X012
(NACE) 10A4912X08219 Bleed Orifice, 316 stainless steel 1R74383516220 Bleed Valve
Heat-treated stainless steel (standard) 1D986735132(NACE) 1D9867X0012
21 Nut, plated steel 1A30932412222 Pilot Body, steel 34B3863X01223 Piston Guide, 416 stainless steel 34B3880X01225*(1) O-Ring
Nitrile (standard) 1U379006992Fluoroelastomer 1V101506382
26*(1) O-RingNitrile (standard) 1F463606992Fluoroelastomer 1N571406382
27 Retaining Ring, plated steel 1R74422898228*(1) Piston Seat Assembly
416 stainless steel/nylon (standard) 14B3881X012(NACE) 14B3881X022
29 PistonHeat-treated 416 stainless steel (standard) 1R744535232
(NACE) 1R7445X001230*(1) O-Ring
Nitrile (standard) 1E218106992Fluoroelastomer 1N530106382
33 BushingStainless steel (standard) 1F262035032(NACE) 1F2620X0012
34*(1) O-RingNitrile (standard) 1D191706992Fluoroelastomer 1N423906382
,EZISYDOB)ND(HCNI
,EULAVEUQROTMUMIXAMN(SDNUOP-TOOF m)
)52(1)05(2)08(3
6x4dna)001(4
55501521005
)57()241()071()876(
Table 4. Maximum Cap Screw (key 14) Torque Values
Type 310A
15
Figure 9. Type 32A Pilot Assembly
Key Description Part Number
35 SpringStainless steel (standard) 1R744637022(NACE) 12B7884X012
36 SpringStainless steel 1U550637022(NACE) 12B7883X012
37 Control Spring, plated steel10 to 20 psig (0,7 to 1,4 bar), silver 1D80962702210 to 100 psig (0,7 to 6,9 bar), yellow 1E392527022100 to 250 psig (6,9 to 17,2 bar), blue 1D387227022250 to 600 psig (17,2 to 41,4 bar), red 1D465127142400 to 750 psig (27,6 to 51,7 bar), green 13A5543X012
Key Description Part Number
38 Connector, plated steel (not shown) 15A6002X46239 Y602-1 Vent Assembly, for pilot mounted on main
valve (not required when pressure loaded) 17A6570X01240 Nameplate - - - - - - - - - - -41 Drive Screw, stainless steel (4 required) 1A36822898252 Plug for use with working monitor only 1V21171401253 Spacer for use with working monitor only 17B8959X01266 Sealing washer for use with pressure
loaded pilot only 1V20569901270 Pipe Bushing 1B6149X0012
34B4129-B
Type 310A
16
Type 310A Main ValveKey Description Part Number
Repair Kits (Include keys 6, 9, 11, 19,26, 27 and 29)With nitrile O-rings1-inch R310X0000122-inch R310X0000323-inch R310X0000524 and 4 x 6-inch R310X000072
With fluoroelastomer O-rings1-inch R310X0000222-inch R310X0000423-inch R310X0000624 and 4 x 6-inch R310X000082
1 Case Body, WCB steelWithout inlet tapping (standard)NPT Screwed1-inch 44B3869X012
Key Description Part Number
Class 300RF1-inch 44B3870X0121-inch (NACE) 44B3870X0222-inch 44B3872X0122-inch (NACE) 44B3872X0223-inch 44B3874X0123-inch (NACE) 44B3874X0224 and 4 x 6-inch 44B3876X0124-inch (NACE) 44B3876X022
Class 600RF1-inch 44B3871X0122-inch 44B3873X0123-inch 44B3875X0124-inch 44B3877X012
WCB steel with inlet tappingClass 300RF1-inch 24B5843X0122-inch 24B6356X012
Class 600RF1-inch 24B6355X0122-inch 24B6357X012
Figure 10. 1-inch (DN 25) Body Size Type 310A Main Valve Assembly34B4130-A
Type 310A
17
Key Description Part Number
2 Base Body, WCB steelWithout travel indicator (standard)NPT1-inch 34B4103X012
Class 300RF1-inch 34B3980X0121-inch (NACE) 34B3980X0222-inch 44B3981X0122-inch (NACE) 44B3981X0223-inch 44B3982X0123-inch (NACE) 44B3982X0224-inch 44B3983X0124-inch (NACE) 44B3983X0224 x 6-inch 44B4110X012
Class 600RF1-inch 34B4104X0122-inch 44B4105X0123-inch 44B4106X0124-inch 44B4107X0124 x 6-inch 44B4111X012
Key Description Part Number
2 Base Body, WCB steel (continued)Without travel indicatorNPT1-inch 3R746822012
Class 300RF1-inch 3U3570220121-inch (NACE) 3U3570X00722-inch 4U3568220122-inch (NACE) 4U3568X00723-inch 4U3572220123-inch (NACE) 4U3872X00624-inch 4U3576220124-inch (NACE) 4U3576X00224 x 6-inch 41A8162X012
Class 600RF1-inch 3R7466220122-inch 4R7404220123-inch 4R7494220124-inch 4R7512220124 x 6-inch 40A9616X012
Figure 11. 2, 3, and 4-inch (DN 50, 80, and 100) Body Size Type 310A Main Valve Assembly
34B4131-A
Type 310A
18
Key Description Part Number
3 Sleeve, stainless steel1-inch 10A8220X0122-inch 20A8221X0123-inch 20A8222X0124-inch 20A8223X0124 x 6-inch 20A9619X012
4 Diaphragm Plate, steel1-inch 1R7470240921-inch (NACE) 1R7470X00122-inch 1R7407243922-inch (NACE) 1R7407X00123-inch 1R7496243923-inch (NACE) 1R7496X00124 and 4 x 6-inch 1R7514250124-inch (NACE) 1R7514X0012
5 Lower Diaphragm Plate, steel1-inch 1R7471240921-inch (NACE) 1R7471X00122-inch 1R7409220122-inch (NACE) 1R7409X00123-inch 2R7498220123-inch (NACE) 2R7498X00124 and 4 x 6-inch 2R7516220124-inch (NACE) 2R7516X0012
6* DiaphragmNitrile/Dacron1-inch 1R7472999822-inch 1R7410999823-inch 1R7499999824 and 4 x 6-inch 2R751799982
Fluoroelastomer1-inch 21A1929X0222-inch 21A1930X0223-inch 21A1931X0224 and 4 x 6-inch 21A1932X022
7 Split Ring, 416 stainless steel1-inch 1R7473351321-inch (NACE) 1R7473X00122-inch 1R7411351322-inch (NACE) 1R7411X00123-inch 1R7500351323-inch (NACE) 1R7500X00124 and 4 x 6-inch 1R7518351324-inch (NACE) 1R7518X0012
Key Description Part Number
8 Spring, steel1-inch 1U8886271121-inch (NACE) 13B7203X0122-inch 1U8885271322-inch (NACE) 12B7885X0123-inch 1U8887270823-inch (NACE) 13B9520X0124-inch 1U8888270824-inch (NACE) 14B3560X0124 x 6-inch 10A9620X012
9* O-Ring (3 required)Nitrile1-inch 1E7369069922-inch 1H2921X00123-inch 1K8776X00224 and 4 x 6-inch 1H862106992
Fluoroelastomer1-inch 1N1633063822-inch 1R7523063823-inch 1L1112063824 and 4 x 6-inch 1U448406382
10 Cap Screw, stainless steel1-inch 1R7475389821-inch (NACE) 1R7475X00122-inch 1R7414389822-inch (NACE) 1R7414X00123-inch 1R7406389823-inch (NACE) 1R7406X00124 and 4 x 6-inch 1R7413389824-inch (NACE) 1R7413X0012
11* Washer, plated steel/composition (for1-inch body) (not shown) 1U984499012
11* O-RingNitrile2-inch 1F4636069923-inch 10A8217X0224 and 4 x 6-inch 10A8218X032
Fluoroelastomer2-inch 1N5714063823-inch 10A8217X0124 and 4 x 6-inch 10A8218X012
12 Disk Retainer, stainless steel1-inch30% capacity 10A8202X01250% capacity 10A8203X012100% capacity 10A8204X012100% capacity (NACE) 10A8204X022
2-inch30% capacity 20A8205X01250% capacity 20A8206X01270% capacity 20A8207X012100% capacity 20A8208X012100% capacity (NACE) 20A8208X022
3-inch30% capacity 20A8209X01250% capacity 20A8210X01270% capacity 20A8211X012100% capacity 10A8212X012100% capacity (NACE) 10A8212X022
4 and 4 x 6-inch30% capacity 20A8213X01250% capacity 20A8214X01270% capacity 20A8215X012100% capacity 20A8216X012100% capacity (NACE) 20A8216X022
Figure 12. Travel Indicator Assembly
14B6653
Type 310A
19
Key Description Part Number
13 Screw, plated steel (8 required)1 and 2-inch 1A3321X00321 and 2-inch (NACE) 1A3321X00423-inch 1U1548389823-inch (NACE) 1U1548X00324 and 4 x 6-inch 1E3044289824-inch (NACE) 1E3044X0012
14 Cap Screw (8 required)1-inch 1N2579X00222-inch 1A7711329823-inch 1L4696329824 and 4 x 6-inch 1R752132982
15 Travel Indicator Rod, stainless steel1-inch 1R7477X00122-inch 1R7416X00123-inch 1R7503X00124-inch 1R7527X00124 x 6-inch 10A9621X022
16 Bushing, stainless steel 1F2620X001217 O-ring, fluoroelastomer 1N42390638218 Travel Indicator Scale, stainless steel
1-inch 1R7478389822-inch 1R7417389823-inch 1R7508389824-inch 1R7522389824 x 6-inch 10A9622X012
19 Wiper Ring, polyurethane (Not for use over 200F)1-inch 1R7482041522-inch 1R7452033623-inch 1R7507041524-inch 1R7526041524 x 6-inch (2 required) 1R752604152
Key Description Part Number
20 Indicator Cap, stainless steel1-inch 12A6413X0122-inch 12A6414X0123, 4, and 4 x 6-inch 12A6415X012
21 Screw, steel, plated (2 required) 1C94192898224 Pipe Plug, steel (not shown) 1A36922449226* Backup Ring, TFE (4 required)
1-inch 1V4356062422-inch 1V4357062423-inch 1V4358062424 and 4 x 6-inch 1V435906242
27* Disk, TFE1-inch 10A8224X0122-inch 10A8225X0123-inch 10A8226X0124 and 4 x 6-inch 10A8227X012
28* Disk Holder, stainless steel1-inch 10A8228X0121-inch (NACE) 10A8228X0222-inch 10A8229X0122-inch (NACE) 10A8229X0223-inch 10A8234X0123-inch (NACE) 10A8234X0224 and 4 x 6-inch 10A8235X0124-inch (NACE) 10A8235X022
29* Body Gasket, nitrile1-inch 11A6853X0122-inch 11A6854X0123-inch 11A6855X0124 and 4 x 6-inch 11A6856X012
37 Nameplate - - - - - - - - - - -38 Drive Screw (4 required) 1A368228982
Figure 13. Backpressure Protection System Assembly
TYPE 32A PILOT
CHECK VALVE
LOADING TUBING
TYPE 310A MAIN VALVE
14B6654
Type 310A
Fisher is a mark owned by Fisher Controls International, Inc., a business of Emerson Process Management. The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are theproperty of their respective owners.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, expressor 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 USAMcKinney, Texas 75070 USA28320 Gallardon, France40013 Castel Maggiore (BO), ItalySao Paulo 05424 BrazilSingapore 128461
www.FISHERregulators.com Fisher Controls International, Inc., 1994, 2001; All Rights Reserved
Figure 14. Type 310A-32A-32A Assembly
Mounting Parts
Single-Pilot or Wide-Open Monitor Pilot Mounting
22 Tubing, steel (not shown) 0500213809W23 Elbow, plated steel (not shown)
Steel 15A6002XW32Stainless steel 15A6002X612
71 Pipe Nipple, 1/2-inch NPT (not shown) 1B828626012
Working Monitor Pilot Mounting
42 Pipe Plug, steel 1R75812409243 Screw, stainless steel/nitrile 1R75809901245 Mounting Bracket, steel 4V211922012
Key Description Part Number
46 Inlet Tubing, steel 0500212401W50 Elbow, plated steel (5 required) 1J13962898252 Plug, brass (2 required) 1V21171401253 Spacer, copper (for monitoring pilot only) 1V21161701254 Tubing, steel 1V21182613255 Tubing, steel 0500212401W56 Connector, plated steel 1J13952898257 Cap Screw, plated steel (2 required) 1A34092405258 Cap Screw, plated steel (2 required) 1A95032405259 Hex Nut, Cd plated steel (2 required) 1A35242412260 Pipe Tee, steel 1K20142899261 Pipe Nipple, galvanized steel 1B35262601262 Pipe Tee, steel 1B86062899263 Pipe Nipple, galvanized steel 1C67892623264 Restriction, steel 1D7469X00A269 Mounting Bar 14B5625X01272 Pipe Tee 1H359428992
WORKING PILOT
PILOT SUPPLYCONNECTION
54B4132
