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Type 92B
Fisher Controls
R
Instruction Manual
T 92B Pilot-Operated
Steam e Regulators
January 1975 Form 1329
WARNING
Regulators should be installed, operated and maintained in accordance with federal, state and local codes, rules and regulations, and Fisher instructions.
If the regulator vents steam or a leak develops in the system, it indicates that service is required. Failure to take the regulator out of service immediately may create a hazardous condition.
Call a serviceman in case of trouble. Only a qualified person must install or service the regulator.
Type Description
The Type 92B is a pilot-operated regulator for steam service. Body availability and inlet pressure limitations are
Body
Material
Cast
Iron
Table 1. Type 92B Specifications
Body
Sizes, In.
1/2, 3/4, 1,
1-1/4, 1-1/2, 2
1-1/2, 2, 2-1/2,
3, 4, 6
End
Connections
Screwed
125 lb. Flgd.
250 lb. Flgd
Maximum
Inlet Pressure
250 psi at 406_F
125 psi at 353_F
250 psi at 406_F
Two pilot assemblies are available for reduced pressures of
2 to 150 psi as shown in table 2 below.
Pilot
Style
Table 2. Type 92B Reduced Pressure Ranges
Low
Pressure
High
Pressure
Pilot
Spring Part
Number
1E3956 27022
1D7455 27142
1E3957 27192
1E3956 27022
1D7455 27142
1E3957 27192
Spring
Color
Code
Yellow
Green
Red
Yellow
Green
Red
Reduced
Pressure
Range
2 to 6 psi
5 to 15 psi
13 to 25 psi
15 to 30 psi
25 to 75 psi
70 to 150 psi eby Fisher Controls Company 1973
W2014
Figure 1. Typical Type 92B Steam Regulator
Principle Of Operation
Refer to the schematic illustration in figure 2. Compression
of the pilot spring ”A” pushes diaphragm ”B” down and holds the pilot valve plug ”C” open. Outlet pressure is changed by varying the amount of pilot spring compression.
When steam enters the inlet of the valve, it also enters pilot supply line ”F” and flows through the open pilot valve to the top of main diaphragm ”H”. The force created by this steam pressure on the diaphragm overcomes the force of the main valve spring ”E” opening the valve plug ”D” and allowing steam to flow downstream. Downstream pressure registers under the main diaphragm through the control line ”J” and tends to balance the diaphragm. Steam from the downstream system also registers under the pilot diaphragm through line ”L”. Pressure forces the diaphragm ”B”
Type 92B
upward, permitting the pilot valve plug to move toward the closed position. Flow of steam to the top of the main diaphragm is thereby reduced and the pressure on main diaphragm drops due to the bleed through the orifice ”N”. The main valve moves toward the closed position, allowing only enough steam flow to satisfy downstream requirements.
When steam demand increases, the downstream pressure decreases below the setting of the pilot spring. The pilot opens to increase the pressure on the main diaphragm. The main valve opens to increase the flow downstream. Conversely, if the steam demand decreases, the downstream pressure increases and the pilot reacts to decrease the pressure on top of the main diaphragm. The main valve throttles toward the closed position and the steam flow decreases. Thus, through the combination of pilot and main valve operation, control of the downstream steam pressure is maintained.
A check valve is included in all Type 92B pilots to limit differential pressure on the main valve diaphragm. In the event of a large decrease in downstream pressure, the check valve opens to relieve diaphragm loading pressure to the downstream system. The check valve cartridge assembly has a factory setting to limit differential pressure across the diaphragm to approximately 40 psi. If diaphragm differential pressure exceeds 40 psi, the check valve opens to relieve diaphragm loading pressure into the downstream system, thereby preventing a high differential across the diaphragm which might otherwise cause diaphragm damage. The check valve closes and normal operation resumes when the differential pressure across the diaphragm is reduced to the proper level.
Installation
The following points should be kept in mind when installing
this regulator. See figure 2 for a schematic drawing of a typi-
cal installation.
1. Inspect the regulator for any shipment damage. Remove any foreign materials that may have collected in the regulator during shipment.
2. Clean out the pipeline as required.
3. Install a strainer ahead of the regulator to protect the internal parts of the valve.
4. Install an upstream block valve ahead of the regulator and a downstream block valve, if required, so that the regulator can be isolated and serviced. If continuous operation is necessary during maintenance or inspection, install bypass piping and valve around the regulator.
5. This regulator is intended to be installed with the diaphragm case above the pipeline so that condensate will not collect in the case.
CHECK
VALVE
INLET PRESSURE
LOADING PRESSURE
DOWNSTREAM PRESSURE
AH1622-B
A1076
Figure 2. Type 92B Operational Schematic
6. Install the regulator in the pipeline so that the flow will be in the direction indicated by the arrow cast on the body.
Follow normal piping procedures when installing the screwed or flanged regulator.
7. Install the external control line ”J” as follows:
7. 1 Connect one end of the control line to the regulator
body tapping shown in figures 7-10. This tapping is 1/4” for
1/2” through 1-1/2” bodies, 3/8” for 2” and 2-1/2” bodies, and
1/2” for 3” through 6” bodies.
Note
The size of the control line should be at least as large as the tapped hole in the regulator.
7. 2 The other end of the control line is connected to the downstream system. Locate the tapped hole for this connection in a straight run of pipe 3 to 5 feet from the regulator when it its the same size as the pipeline. Locate the tapped hole at a distance from the swage connection equal to 10 times the pipe diameter when the regulator is smaller than the pipeline size and swage nipples are required.
7. 3 Do not locate the control line tap in an elbow, swage, or other changes in configuration of the pipeline where turbulence or abnormal velocities may occur.
7. 4 Do not locate the control line tap in a vessel, such as a deaerator, located immediately downstream of the regulator. Locate the tap in the pipeline leading to the vessel.
7. 5 Slope the control line away from the regulator so that condensate can drain back into the pipeline.
7. 6 Install a shutoff valve (not a needle valve) in the control line.
2
Type 92B
7. 7 Install a pressure gauge in the control line or near the outlet of the regulator to aid in setting the outlet pressure.
CAUTION
The maximum inlet and outlet pressures for which this regulator has been manufactured should not be exceeded. These pressures are stamped on the nameplate attached to the pilot.
SET SCREW
JAM NUT
SCREWS (8)
SPRING CASE
UPPER SPRING SEAT
SPRING
Operating Procedure
To Put Into Operation
To put the regulator into operation after installation or after disassembly for inspection or repairs, proceed as follows,
referring to figures 3, 5, & 6 as necessary.
1. Relieve all spring compression on the pilot spring by 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 into the spring case until the downstream pressure reaches the required setting. Tighten hex nut on the set screw.
To put the regulator into operation after a normal shutdown of the system, it is not necessary to follow the above procedure. Simply open the block valves slowly and allow the regulator to take over control of the downstream pressure at the setting of the pilot valve spring.
Adjustment
To adjust the downstream reduced pressure setting, turn the set screw clockwise into the spring case to increase the downstream pressure setting. Turn it counterclockwise out of the spring case to decrease the setting. Loosen hex nut on screw before adjustment and tighten it once adjustment is made.
Troubleshooting
Operating difficulties may be experienced with this regulator as a result of improper installation, improper regulator sizing, damage, or an accumulation of dirt, boiler compound and other foreign materials on internal parts.
When trouble occurs, check the following:
1. Buildup of Downstream Pressure
1. 1 Check for plugged bleed fitting (key 61, figure 4).
STRAINER
SCREEN AS-
SEMBLY
LOWER SPRING SEAT
DIAPHRAGMS (2)
DIAPHRAGM GASKET
BELLOWS RETAINER
BELLOWS
VALVE STEM
VALVE BODY
PIPE PLUG
CHECK VALVE ASSEMBLY
BLOWDOWN PLUG
SEAT RING
VALVE PLUG
VALVE PLUG SPRING
VALVE PLUG GUIDE
W0070-2
Figure 3. Exploded View of Type 92B High Pressure
Pilot Valve
1. 2 Check for a clogged pilot inlet strainer and internal parts of pilot for accumulation of dirt, boiler compound, or other materials.
2. Failure to Maintain Downstream Pressure
2. 1 Check for ruptured diaphragm (key 60, figure 4).
2. 2 Check to see that the valve is not undersized.
3. Cycling or Hunting
3. 1 Check to see that the valve is not oversized. A cycling Type 92B might possibly control the downstream pressure within acceptable limits but the life of the diaphragms, guide bushings, seat ring, and valve plug would be greatly reduced.
3.1.1 If cycling occurs, as a result of over-sizing or other causes, it can frequently be minimized by reducing the gain of the Type 92B. This can be accomplished by installing a suitable reducing regulator such as a Type 95H
in the Type 92B pilot supply line (”F” of figure 2). Adjust the
pilot supply line regulator to reduce pilot supply pressure to about 30 psig above the outlet pressure setting of the 92B regulator.
3
Type 92B
This arrangement can minimize cycling and still provide adequate pilot supply pressure to ensure full opening of the main valve plug, if required.
Note
The 30 psig figure is suggested for units which include the standard 17-4 PH SST main spring. This spring requires approximately 20 psig diaphragm differential pressure to fully stroke the main valve. If the lighter rate Inconel spring is used, only about 10 psig diaphragm differential pressure is required to fully stroke the unit. Therefore, the pilot supply pressure can be reduced to about 20 psig above the outlet pressure setting of the regulator without loss of control capability.
Maintenance
CAUTION
Before disassembly or removing the regulator from the line, isolate it from the pressure system and release all the pressure from the regulator.
Due to normal wear, parts must be periodically inspected and replaced if necessary. The frequency of inspection depends on the severity of the service conditions.
Main Valve Disassembly
Key numbers listed are shown on the body assembly
1. Remove all tubing.
2. Mark the outside edge of the body and diaphragm case flanges with assembly marks to ensure proper assembly. Remove bolts from diaphragm case and lift off the case. On sizes 1-1/2” - 6”, first remove the loading tubing compression coupling fitting from the pipe nipple.
3. Take out the diaphragm assembly which consists of tow metal diaphragms (key 60), bleed fitting (key 61), and diaphragm plate (key 59). Separate these parts by unscrewing the bleed fitting from the diaphragm plate.
4. Remove cap screws from bottom flange (key 52).
Take off bottom flange. The valve plug (key 56) and spring (key 57) will drop out.
5. Unscrew the seat ring (key 58), if necessary. A seat ring puller can be obtained from Fisher Controls, if desired.
6. Remove guide bushings (key 53) from body and bottom flange, if necessary.
Pilot Disassembly
Key numbers listed are shown on the appropriate pilot
assembly drawing, figure 5 or 6.
1. Remove pilot from main valve by unscrewing it from the mounting nipple or unscrewing the nipple from main valve.
2. Relieve the spring compression by turning the set screw (key 15) counterclockwise after loosening hex nut
(key 16).
3. Remove the casing cap screws. Take off the spring case, and remove upper spring seat, spring, lower spring seat, two diaphragms and the diaphragm gasket. Note
that in a low pressure pilot (figure 5), the lower spring
seat and the diaphragm plate are both parts of the diaphragm plate assembly (key 24) and are pinned together.
4. Unscrew the bellows retainer (key 8) from the pilot body. Take out the bellows and the valve stem (keys 9 &
7).
5. Unscrew the valve plug guide (key 2). The valve plug
(key 4) and the valve plug spring (key 3) will come out with the guide.
6. Unscrew the seat ring (key 5), if necessary.
7. Remove the check-valve assembly (key 75) with a screwdriver after having removed the pipe plug (key 74).
Be sure check-valve is not clogged. Replace the entire check-valve assembly, if necessary. The check valve assembly should not be disassembled in the field, because its setting is made at the factory and will be lost by disassembling.
8. Remove the strainer screen assembly (key 6), if necessary.
Main Valve Reassembly
Inspect all internal parts for excessive wear or damage.
Use new parts whenever necessary. Reassemble the main valve as follows:
1. Install new guide bushings (key 53) in the body (key
51) and bottom flange (key 52) if old ones were removed.
2. Screw in the seat ring (key 58).
3. Install valve plug (key 56) and its spring (key 57).
4. Use new bottom flange gasket and replace the bottom flange and cap screws (key 55).
5. Make up the diaphragm assembly by screwing the bleed fitting (key 61) into the diaphragm plate (key 59), clamping the diaphragm (key 60) in place.
6. Put the diaphragm assembly in place on the body and replace the diaphragm case (key 62). Make sure assembly marks line up. Replace cap screws and nuts (keys 63 and 64). Install the loading tubing compression coupling fitting on the pipe nipple (sizes 1-1/2” - 6”).
7. Reconnect all tubing after the pilot is mounted.
4
Type 92B
Pilot Reassembly
Inspect all internal parts for excessive wear or damage.
Use new parts wherever necessary.
Reassemble the pilot as follows.
1. Screw in seat ring (key 5).
2. Place valve plug spring (key 57) and valve plug (key
56) in the valve plug guide (key 2). Screw guide into body
(key 1).
3. Place valve stem (key 7) in the body, smaller diameter first.
4. Place bellows (key 9) in body and secure in place by screwing in the bellows retainer (key 8).
5. Use new diaphragm gasket (key 18) and put two diaphragms (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 diaphragm and install the spring case. Note that on the low pressure pilot, the lower spring seat and diaphragm plate are part of a subassembly.
7. Install strainer screen assembly (key 6).
8. Mount pilot on main valve and install all tubing. Refer
to table 3 and figures 7 through 10 for additional informa-
tion.
To Clean Pilot Strainer Assembly
To Clean Bleed Fitting
If the 5/64” dia. hole in the bleed fitting (key 11, figure 3)
becomes plugged, it can be cleared by running a wire through it. To gain access to this hole, first isolate the valve and relieve all pressure. Then remove either the tubing and fitting (sizes 1/2” - 1-1/4”) or the pipe plug
(sizes 1-1/2 - 6”) from the top of the diaphragm case.
Clear the hole, replace the case fitting and resume normal operation.
Serial Number
Each Type 92B reducing valve is assigned a serial number. It can be found stamped on the nameplate attached to the spring case of the pilot. Refer to the serial number and the complete part number when ordering spare parts or requesting technical advice from your representative.
The pilot is provided with a blowdown connection (pipe
plug, key 21, figures 5 and 6) which is used to clear the
inlet strainer. To clean, isolate the regulator, relieve all pressure, and remove this pipe plug. Then crack open the upstream block valve to allow steam to flush the strainer of all foreign materials. Close block valve, replace the pipe plug and resume normal operation. Where frequent blowdown is anticipated, it may be desirable to install a blowdown valve in place of the pipe plug.
30A6348-B
Figure 4. Main Valve Assembly
Table 3. Standard Type 92B Tubing and Fittings
Loading Tubing
Part Number
Control Tubing
Part Number Valve
Size,
End
Connections High Pressure
Pilot
Low Pressure
Pilot
High Pressure
Pilot
Low Pressure
Pilot
1/2 & 3/4
1 & 1-1/4
1-1/2
2
2-1/2
3
Screwed
Screwed
Screwed
Flanged
Screwed
Flanged
Flanged
Flanged
1H5017 17012
1H5019 17012
1H5021 17012
1H5023 17012
1H5025 17012
1H5027 17012
1K7043 17012
1K7045 17012
1L8561 17012
1K7339 17012
2K3614 17012
1K7338 17012
1H5016 17012
1H8222 17012
1H5020 17012
1H5022 17012
1H5024 17012
1H5026 17012
1K7042 17012
1K7044 17012
1L8560 17012
1P6840 17012 (1)
1H5026 17012
1P6840 17012 (1)
4
6
Flanged
Flanged
1H5029 17012
1H5031 17012
1L2713 17012
1P6840 17012 (1)
1H5028 17012
1H5030 17012
1. Pre-formed tubing not available. Order by number shown and length required. Cut and/or bend to fit on jobsite.
1L2714 17012
1P6840 17012 (1)
Elbow
1A3971 18992
1
1
1
1
1
1
1
1
Fittings Required
Male
Connector
1A6368 14012
3
1
2
2
2
2
2
2
Female
Connector
1A4178 14012
—
—
1
1
1
1
1
1
5
Type 92B
CJ8998-C
Figure 5. Low Pressure Pilot Assembly
BF9827-E
Figure 6. High Pressure Pilot Assembly
1A3971
1A6368
CONTROL
TUBING
6
2F2574-G
LOADING
TUBE
1A6368
Figure 7. Standard Tubing Arrangement for 1/2” through 1-1/4” Type 92B Regulators
CONTROL
LINE
TAPPING
Type 92B
ELBOW , MALE
1/4 NPT x 1/4 OD TUBE
CONNECTOR, FEMALE
1/4 NPT x 1/4 OD TUBE
CONTROL
TUBING
LOADING
TUBING
2F2573-H
CONNECTOR, MALE
1/4 NPT x 1/4 OD TUBE
Figure 8. Standard Tubing Arrangement For 1-1/2” Through 6” Type 92B Regulators
1A3971
LOADING
TUBING
1P6840
CONTROL LINE TAPPING
CONTROL
TUBING
1P6840
1A6368
1A6368 1A6368
2R3215-C
Figure 9. Optional Tubing Arrangement For Control Line Side Mounting Of Pilot On 1/2” Through 1-1/4” Type 92B Regulators
CONTROL
LINE
TAPPING
1A4178
LOADING
TUBING
1P6840
1A6368
CONTROL LINE TAPPING
CONTROL
TUBING
1P6840
1A6368
1A3971
2R3216-C
Figure 10. Optional Tubing Arrangement For Control Line Side Mounting Of Pilot On 1-1/2” Through 6” Type 92B Regulators
7
Type 92B
C D
B
CONTROL
TUBING
LOADING
TUBING
CONTROL
TUBING
LOADING
TUBING
A E
Modified
2F2574-F
Modified
1P3386-A Figure 11. Mounting Method For
1/2” Through 1-1/4” Sizes
Figure 12. Mounting Method For
1-1/2” Through 6” Sizes
Instructions For Installing Type 92B
Pilot on Type 92A Main Valve
The Fisher Type 92A is a former model of this family of steam regulators. The pilot used with the current Type
92B regulator can be installed on an existing Type 92A main valve. Use the following procedures.
1/2 Through 1-1/4” Bodies
Reference to figure 11 will aid in the pilot changeover.
1. Remove the old pilot. Nipple mount the new pilot.
2. Connect loading tubing and control tubing. Tubing
(1/4”) and fittings should be supplied by the customer.
Bend tubing at the job site to fit.
Par List
Main Valve (Figures 4 & 7-10)
Key Description
51
Key Description
51
Part Number
Valve Body, cast iron
NPT
1/2”
3/4”
1”
1-1/4”
1-1/2”
2”
Class 125 FF flanged
1-1/2”
2”
2-1/2”
3”
4”
6”
Class 250 RF flanged
1-1/2”
2”
3F3118 19012
3F3084 19012
3H5846 19022
3H5845 19022
3H2748 19012
3F2497 19022
3H2750 19022
3F2498 19022
3F3119 19022
3H3064 19022
3H3146 19022
3F3381 19022
3H2751 19022
3F2499 19022
52
53
1-1/2” Through 6” Bodies
Reference to figure 12 will aid in the pilot changeover.
1. Remove the old pilot. Nipple mount the new pilot.
2. Move pipe nipple and fitting from location ”C” to location ”D”.
3. Remove diaphragm case bolts and rotate the case two bolt holes in a counterclockwise direction so that the passage in the case lines up with the hole ”D”.
4. Connect loading tubing from ”E” to ”D”. Connect control tubing from ”A” to ”B”. Customer supplies own 1/4” tubing and fittings. Bend tubing at the job site to fit.
Part Number
Valve Body, cast iron (continued)
2-1/2” 3F3120 19022
3” 3H3065 19022
4”
6”
Bottom Flange Assembly
Cast iron
1/2” & 3/4”
3H3147 19022
3F3382 19022
1J3023 000A2
1” & 1-1/4
1-1/2
2”
2-1/2”
1J3024 000A2
1J3026 000A2
1J4339 000A2
0U0323 000A2
3”
4”
0U0357 000A2
0T0786 000A2
6” 0U0726 000A2
Guide Bushing, 17-4 PH SST
1/2” & 3/4” 1A3838 35012
1” & 1-1/4
1-1/2
2”
2-1/2”
3”
4”
6”
1A4091 35012
1A4161 35012
1A4192 35012
1A4237 35012
1A4271 35012
1A4309 35012
IA4401 35012
Key Description
54* Gasket, asbestos
1/2” & 3/4”
1” & 1-1/4
1-1/2
2”
2-1/2”
3”
4”
6”
55
56
Cap Screw, steel, pl
1/2” & 3/4” (4 req’d)
1” & 1-1/4 (6 req’d)
1-1/2 (6 req’d)
2” (6 req’d)
2-1/2” (8 req’d)
3” (8 req’d)
4” (8 req’d)
6” (8 req’d)
Valve Plug, SST
1/2” & 3/4”
1” & 1-1/4
1-1/2
Part Number
0U0173 04022
0U0200 04022
0U0247 04022
0T0681 04022
0U0317 04022
0U0365 04022
0U0788 04022
0U0733 04022
1A3531 24052
1A3369 24052
1A3375 24052
1A4185 24052
1A4186 24052
1A3444 24052
1A4302 24052
1A4402 24052
2P4307 46172
2P9796 46172
2P9797 46172
*Recommended spare part
8
Key Description Part Number
56
57
Valve Plug, SST (continued)
2” 2P9798 46172
2-1/2”
3”
4”
2P9799 46192
2P9800 46192
3P9801 46192
6”
Spring
2P9802 46192
17-4PH (standard—for 20 psi pressure drop or greater)
1/2” & 3/4” 1R1512 37052
1” & 1-1/4
1-1/2
2”
2-1/2”
1R1513 37052
1R1514 37052
1R1515 37052
1R1516 37052
3”
4”
6” 1R1519 37052
Inconel (for 10-20 psi minimum pressure drop)
1R1517 37052
1R1518 37052
1/2” & 3/4”
1” & 1-1/4
1-1/2
2”
2-1/2”
3”
4”
6”
58* Seat Ring, SST
1/2” & 3/4”
1” & 1-1/4
1-1/2
2”
2-1/2”
3”
4”
6”
0U0163 42012
0U0202 42012
0U0237 42012
0T0860 42012
0U0326 42012
0U0359 42012
0T0858 42012
0U0735 42012
2P4306 46172
2P9803 46172
2P9804 46172
2P8967 46192
2P2191 46192
2P8980 46192
3P9805 46192
2P9806 46192
59 Diaphragm Plate, cast iron
1/2” & 3/4” 1F3090 19012
1” & 1-1/4 1F2515 19012
1-1/2
2”
2-1/2”
3”
1F3010 19012
1F2504 19012
1F3126 19012
1F3248 19012
4”
6”
1F3356 19012
1F3389 19012
60* Diaphragm, 302 SST (2 req’d)
1/2” & 3/4” 1F3091 36012
1” & 1-1/4
1-1/2
1F2514 36012
1F3012 36012
61
2”
2-1/2”
3”
4”
6”
Bleed Fitting, 416 SST
1F2503 36012
1F3127 36012
1F3249 36012
1F3357 36012
1F3390 36012
3”
4”
6”
1/2” & 3/4”
1” & 1-1/4”
1-1/2” & 2”
2-1/2”
1H3731 35132
1F2513 35132
1F2502 35132
1F3128 35132
1F3250 35132
1F3358 35132
1F3391 35132
Type 92B
Key Description
62 Diaphragm Case, cast iron
1/2” & 3/4”
1” & 1-1/4
1-1/2
2”
2-1/2”
3”
4”
6”
Part Number
1L5471 19172
2L5472 19012
2L5863 19012
2L5866 19022
2L5869 19022
2L5872 19022
2F3360 19022
2F3393 19022
69
70
71
63
64
65
66
67
Cap Screw, steel, pl
(12 req’d)
1/2” & 3/4”
1” & 1-1/4
1-1/2 & 2”
(16 req’d)
2-1/2”
3” & 4”
(24 req’d)
1A4027 24052
1A4130 24052
1A4175 24052
1A4187 24052
1A4278 24052
6”
Hex Nut, steel, Cd pl
(12 req’d)
1/2” & 3/4”
1” & 1-1/4
1-1/2 & 2”
(16 req’d)
2-1/2”, 3” & 4”
(24 req’d)
6”
Loading Tubing
Copper
1A4406 24052
1A3465 24122
1A4132 24122
1A4176 24122
1A4201 24122
1A3754 24122
See following table
Pipe Bushing, steel, pl (none req’d for
1-1/2 through 6”) 1C3790 26232
Pipe Plug, steel (none req’d for 1”,
1-1/4”,
4”, or 6”)
1/2” & 3/4”
1-1/2” through 3”
Pipe Plug, steel
1A7675 24662
1A3692 24092
1A3692 24092
Control Tubing
Copper See following table
Male Connector, brass
1/2” & 3/4 ” (3 req’d) 1A6368 14012
1” & 1-1/4” (1 req’d) 1A6368 14012
1-1/2” to 6” (2 req’d) 1A6368 14012
2
3
4*
72
73
Elbow, brass
Female Connector, brass
1A3971 18992
(1-1/2” through 6” only) 1A4178 14012
Pilot (Figures 5 & 6)
1 Pilot Valve Body, cast iron
Low pressure 32A040 4X012
High pressure
Valve Guide, SST
22A040 3X012
1E3918 35132
Valve Spring, 302 SST 1E3924 37022
Valve Plug, 302 SST 1F9674 46172
Key Description
5*
6
7
8
Seat Ring, 416 SST
Strainer Assembly,
Brass/monel
Valve Plug Stem,
416 SST
Part Number
1H5644 46172
1F9676 000A2
1F9678 35132
Bellows Retainer, brass 1F9712 14012
9 Bellows, brass 1F9713 18992
10* Diaphragm, 302 SST (2 req’d)
Low pressure 1E3969 36012
11
12
High pressure 1E3958 36012
Lower Spring Seat, aluminum
(High pressure only) 1J9140 08012
Spring, steel, Cd pl
Low pressure pilot
2 to 6 psig
5 to 15 psig
13 to 25 psig
High pressure pilot
15 to 30 psig
25 to 75 psig
70 to 150 psig
1E3956 27022
1D7455 27142
1E3957 27192
1E3956 27022
1E7455 27142
1E3957 27192
13
14
15
16
Upper Spring Seat
Steel, Cd pl
Spring Case, cast iron
Low pressure
High pressure
1D6671 25072
3J4963 19012
2J4962 19012
Set Screw, steel, Cd pl 1D9954 48702
Hex Nut, steel, Cd pl 1A3537 24122
24
74
75
17 Cap Screw, steel, pl
Low pressure (10 req’d) 1A3816 24052
High pressure (8req’d) 1A3816 24052
18* Diaphragm Gasket, asbestos
19
20
Low pressure
High pressure
Drive Screw, SST
(2 req’d)
Nameplate, aluminum
1E3970 04022
1E3961 04022
1A3682 28982
Low pressure
High pressure
10A837 1X012
10A837 2X012
21
22
Pipe Plug, steel, Cd pl 1A7675 24662
Pipe Nipple, steel
Low pressure
High pressure
1B8252 26012
1A4735 26012
Diaphragm Plate Assembly (Low pressure only)
Pipe Plug, steel
1J9000 000A2
0Z0201 28992
Check-Valve Assembly 12A040 5X012
9
Type 92B
Key 65 Loading Tubing, copper
Valve Size,
Inches
1/2 & 3/4
1 & 1-1/4
1-1/2
2
4
6
2-1/2
3
High-Pressure
Pilot
1H501717012
1H501917012
1H502117012
1H502317012
1H502517012
1H502717012
1H502917012
1H503117012
Low-Pressure
Pilot
1K704317012
1K704517012
1L856117012
1K733917012
2K361417012
1K733817012
1L271317012
1P684017012
Key 70 Control Tubing, copper
Valve Size,
Inches
1/2 & 3/4
1 & 1-1/4
1-1/2
2
4
6
2-1/2
3
High-Pressure
Pilot
1H501617012
1H822217012
1H502017012
1H502217012
1H502417012
1H502617012
1H502817012
1H503017012
Low-Pressure
Pilot
1K704217012
1K704417012
1L856017012
1P684017012
1H502617012
050091701W
1L271417012
1P684017012
While this information is presented in good faith and believed to be accurate, Fisher Controls does not guarantee satisfactory results from reliance upon such information. Nothing contained herein is to be construed as a warranty or guarantee, express or implied, regarding the performance,
10
R
Fisher Controls
merchantability, fitness or any other matter with respect to the products, nor as a recommendation to use any product or process in conflict with any patent. Fisher Controls reserves the right, without notice, to alter or improve the designs or specifications of the products described herein.
For information write
P.O. Box 190, Marshalltown, Iowa 50158, U.S.A.
or Brenchley House, Maidstone, Kent ME 14 1UQ, England
Type 92B
February 1985
Errata Sheet for
Type 92B PILOT-OPERATED STEAM PRESSURE REGULATORS INSTRUCTION MANUAL
Form 1329, January 1975
the other pilot internal parts for accumulation of dirt, boiler compound, or other materials.
D On page 5 in the To Clean Bleed Fitting procedure, change the bleed fitting reference so that it correctly reads key
D On page 9 at the beginning of the pilot parts list, add the following:
Repair Kits (included are keys 4, 5, 7, 8, 9, 10, 18, and 77)
Low pressure pilot
High pressure pilot
R92BLP X0012
R92BHP X0012
D On page 9 in the pilot parts list, delete keys 6 and 21 and add key 77 with the following description and part number:
Screen, stainless steel 16A1512 X012
D On page 9, key 12, in the pilot parts list, change the 25 to 75 psig high pressure pilot spring part number so that it correctly reads 1D7455 27142.
CJ8998-E
EFisher Controls International, Inc. 1985: All Rights Reserved
Figure A. Low Pressure Pilot Assembly
11
Type 92B
BF9827-G
Figure B. High Pressure Pilot Assembly
12
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