Fisher 92C Instruction Manual

Instruction Manual D100255X012

January 2020

Type 92C Steam Regulator

WARNING

Fisher™ regulators must be installed, operated and maintained in accordance with federal, state and local codes, rules and regulations and Emerson Process Management Regulator Technologies, Inc. instructions.

Installation, operation and maintenance

procedures performed by unqualied

personnel may result in improper adjustment and unsafe operation. Either condition may result in equipment damage

or personal injury. Use qualied personnel

when installing, operating and maintaining the Type 92C regulator.

Introduction

Scope of the Manual

This instruction manual provides installation, maintenance and parts ordering information for the Type 92C steam self-powered control valve and the Type 6392 pilot. Both the pilot-operated and the pressure-loaded constructions are covered. The Type 92C is also available with a Type 6492HM or 6492HTM safety override pilot. The pressure-loading device and accessories used with this valve are covered in other manuals.

regulator or 670 Series panel-mounted regulator may be used as the loading regulator.

A Type 6492HM (or 6492HTM) safety override pilot is also available for the Type 92C. The Type 6392 pilot is used in a series installation with the Type 6492HM (or 6492HTM) safety override pilot installed on the upstream valve. The Type 6492HM (or 6492HTM) safety override pilot senses pressure downstream of the second valve, and prevents pressure from rising above safe operating pressure in the event the downstream valve fails. This system is approved by ASME B31.1-1989, 122.14.2.A, and can replace an ASME safety valve when vent piping is not practical and upstream pressure does not exceed 400 psig / 27.6 bar. Local codes and standards may require approval by an appropriate authority prior to installation.

Type 92C

W3111_2

Figure 1. Type 92C Pilot-Operated Regulator

WARNING

Description

The Type 92C steam regulator is a gray cast iron, steel or stainless steel pressure-reducing regulator for steam or hot air service. This regulator is available with a Type 6392 pilot for use as a pilot-operated regulator (Figure 1) or without a pilot for use as a pressureloaded regulator. The pilot-operated version uses inlet pressure as the operating medium; no separate air supply is required. The pressure-loaded version is used where remote adjustment of the regulator pressure setting is required; a 67 or 1301 Series

The Type 92C safety override system

does not provide positive shuto󰀨 in

dead end service. It is intended for large distribution systems where steam leakage will condense before steam pressure builds up. Downstream piping and components must be rated for maximum upstream steam pressure for dead end service. Failure to do so could cause personal injury or death.

Type 92C

Specications

This section lists the specications for Type 92C regulator. Additional specications for an individual regulator are

found on the regulator body and pilot nameplates.

Body Sizes and End Connection Styles

SIZE

NPS 1/2, 3/4 or 1 /

DN 15, 20 or 25

Gray Cast Iron Steel or CF8M Stainless Steel

NPT

BODY MATERIAL

NPT, CL150 RF, CL300 RF

or PN 16/25/40

Orice Sizes

NPS 1/2 / DN 15 Main Valve:

9/16 in. / 14 mm NPS 3/4 and 1 / DN 20 and 25 Main Valves:

3/4 in. / 19 mm is standard; 9/16 in. / 14 mm is optional

Maximum Allowable Inlet and Pilot Supply Pressures

(1)

Gray Cast Iron Construction: 250 psig / 17.2 bar Steel and Stainless Steel Construction:

300 psig / 20.7 bar

Regulator Pressure Drops

(1)

Minimum: 15 psi / 1.0 bar Maximum Operating: 150 psi / 10.3 bar for

outlet pressure settings equal to or below 50 psig / 3.4 bar; 200 psi / 13.8 bar for outlet pressure settings above 50 psig / 3.5 bar

Maximum Emergency

Gray Cast Iron construction: 250 psi / 17.2 bar Steel and Stainless Steel construction:

Maximum Material Temperature Capabilities

Gray Cast Iron Construction: 406°F / 208°C Steel and Stainless Steel Construction:

500°F / 260°C

Optional High-Temperature Steel or

Stainless Steel Body: 650°F / 343°C

Pressure Registration

With Pilot: External Without Pilot: Internal

Downstream Control Line Connection

1/4 NPT (internal) in pilot body (downstream control line not required for pressureloaded regulator)

300 psi / 20.7 bar

Loading Pressure Connection

Outlet Control Ranges

See Table 1

Maximum Outlet Pressures

(1)

Maximum Operating Outlet Pressure:

150 psig / 10.3 bar

Maximum Emergency Outlet (Casing) Pressure

Gray Cast Iron construction: 250 psig / 17.2 bar Steel and Stainless Steel construction:

300 psig / 20.7 bar

Loading Pressure for Pressure-Loaded Regulator

(1)

1/4 NPT (internal) in main valve diaphragm ange

(this connection is factory-piped to the pilot on pilot-operated regulator)

Pilot Spring Case Vent

3/32 in. / 2.4 mm drilled hole

Approximate Weights

Gray Cast Iron, Steel or Stainless Steel Body with Pilot: 20 lbs / 9.1 kg

Gray Cast Iron, Steel or Stainless Steel Body without Pilot: 16 lbs / 7.3 kg

See Figure 2 to determine loading pressure. Maximum allowable loading pressure is 250 psig /

17.2 bar for gray cast iron construction and 300 psig / 20.7 bar for steel or stainless steel construction; the maximum allowable diaphragm

di󰀨erential pressure of 150 psi / 10.3 bar

for gray cast iron, steel and stainless steel constructions must not be exceeded.

1. Pressure/temperature limits in this Instruction Manual and any applicable code limitations must not be exceeded.

(1)

TYPE 92C REGULATOR

PILOT LOADING LINE

Type 92C

26A3808-A A2508-1

PRESSURE DROP ACROSS VALVE (bar)

2 4 6 8 10 12

DIAPHRAGM DIFFERENTIAL (psi)

PRESSURE DROP ACROSS VALVE (psi)

3/4 in. / 19 mm

orice size

9/16 in. / 14 mm

orice size

50 100 150 200

Figure 2. Diaphragm Dierential Pressure

for Pressure-Loaded Regulator

TYPE

6492HM

6492HTM

SPRING RANGE

psig bar

10 to 30 0.69 to 2.1 Yellow 5 psig / 0.34 bar over normal distribution pressure

25 to 75 1.7 to 5.2 Green

70 to 150 4.8 to 10.3 Red

80 to 250

15 to 100 1.0 to 6.9

PILOT SUPPLY

TYPE 6392 PILOT

0.5

DIAPHRAGM DIFFERENTIAL (bar)

TOP VIEW OF REGULATOR AND

PILOT CONNECTIONS

STRAINER

16A1548-B A2522-1

Figure 3. Typical Pilot-Operated Type 92C

Regulator Installation

Table 1. Safety Pilot Outlet (Control) Pressure Ranges

MINIMUM PRESSURE AT WHICH MONITORING

10 psig / 0.69 bar over normal distribution pressure

5.4 to 17.2

SPRING COLOR

Unpainted

DOWNSTREAM CONTROL LINE

BYPASS LINE

PILOT CAN BE SET

TYPE 6392 PILOT

DOWNSTREAM CONTROL LINE

TYPE 92C REGULATOR

Table 2. Outlet Pressure Ranges

SPRING USAGE

Standard use up to

500°F / 260°C

High-pressure and/or High

temperature over 500°F / 250°C

OUTLET PRESSURE RANGE

psig bar In. mm In. mm

5 to 70 0.34 to 4.8 1E392627012, Green 0.170 4.32 2.00 50.8

20 to 150 1.4 to 10.3 1E392727142, Red 0.207 5.26 1.94 49.0

15 to 100 1.0 to 6.9 14B9941X012, Unpainted 0.192 4.88

80 to 200 5.5 to 17.2 14B9940X012, Unpainted 0.282 7.16

SPRING PART NUMBER

AND COLOR

Table 3. Flow Coecients

ORIFICE SIZE WIDE-OPEN FOR RELIEF SIZING

In. mm C

9/16 14 170 8.5 5

3/4 19 240 12 7.1

1. Cv = Cs x 20 ÷ C

SPRING WIRE DIAMETER SPRING FREE LENGTH

(1)

34 0.67

Table 4. IEC Sizing Coecients

BODY SIZE

NPS DN X

1/2 15

3/4 or 1 20 or 25 0.44 0.73 0.38 0.82

0.73

9/16 in. / 14 mm 3/4 in. / 19 mm

0.38

ORIFICE SIZE

0.82

- - - - - - - - - - - -

1.96 49.8

Type 92C

TYPE 92C MAIN VALVE

TYPE 6492HM SAFETY

OVERRIDE PILOT

TYPE 6492HM SAFETY

OVERRIDE PILOT

TYPE 92C MAIN VALVE

TYPE 6392 PILOT

TOP VIEW

TYPE 6392 PILOT

TYPE 92C MAIN VALVE TYPE 92C MAIN VALVE

E0656

E0657

TYPE 6492HM SAFETY

GAUGE

BLOCK VALVE

OVERRIDE PILOT

TYPE 6392 PILOT

TYPE 92C MAIN VALVE TYPE 92C MAIN VALVE

SIDE VIEW

GAUGE

TYPICAL TYPE 92C WITH TYPE 6492HM OR 6492HTM SAFETY OVERRIDE PILOT INSTALLATION

TYPE 6392 PILOT

GAUGE

BLOCK VALVE

Figure 3. Typical Pilot-Operated Type 92C Regulator Installations (continued)

Type 92C

Note

To determine required loading pressure,

add the diaphragm di󰀨erential pressure

to the desired outlet pressure setting.

Principle of Operation

Pilot-Operated Regulator

Refer to Figure 5. Pilot supply pressure is piped from the inlet side of the main valve to the pilot inlet connection. Downstream pressure registers under the main valve diaphragm through the pitot tube and under the pilot diaphragm through the downstream control line.

When downstream pressure decreases to a value below the setting of the pilot regulator spring, the pilot spring forces the pilot valve plug open, increasing the loading pressure on the top of the main valve diaphragm. The increased loading pressure on top of the main valve diaphragm and decreased downstream pressure under the main valve diaphragm force the main valve diaphragm and stem downward. This

opens the main valve plug, and increases ow to

the downstream system, thus restoring downstream pressure to the setting of the pilot regulator spring.

When downstream pressure increases it registers under the pilot diaphragm and overcomes the force of the pilot spring. This allows the pilot valve spring to close the pilot valve plug and causes excess loading pressure to bleed to the downstream system through the pilot bleed hole. At the same time, increased downstream pressure registers under the main valve diaphragm. The decreased loading pressure on top of the main valve diaphragm and increased downstream pressure under the main valve diaphragm force the main valve diaphragm upward. This allows the main valve plug spring to close the main valve plug,

reducing ow to the downstream system.

Pressure-Loaded Regulator

Refer to Figure 7. With a pressure-loaded regulator, a remote, adjustable loading regulator provides loading pressure to the top of the main valve diaphragm. Downstream pressure registers under the main valve diaphragm through the pitot tube.

When downstream pressure decreases, it registers under the diaphragm and allows the stem and plug to move downward, thereby opening the valve to increase downstream pressure.

When downstream pressure increases, it registers under the diaphragm and forces the stem and plug to move upward. The upward force of the spring

causes the valve to close, which decreases ow to

the downstream system thus decreasing downstream pressure. In hot air service, supply air above the diaphragm becomes compressed and is vented to the atmosphere. If a steam supply is used, the steam is vented downstream.

Safety Override Pilot Principle of Operation

Refer to Figure 6. Once placed in operation, the upstream Type 6392 pilot senses the intermediate pressure between both valves, and the Type 6492HM (or 6492HTM) pilot senses downstream pressure

of the second valve. As demand for ow increases,

intermediate pressure will fall causing the Type 6392 pilot to open. As the Type 6392 pilot valve opens, loading pressure to the main valve increases, opening the main valve.

The Type 6492HM (or 6492HTM) safety override pilot remains open because its setpoint is above the setpoint of the downstream valve. In the unlikely event that the downstream valve fails open, downstream pressure will rise above the downstream valve’s setpoint. This pressure is sensed by the Type 6492HM (or 6492HTM) safety override pilot. As downstream pressure increases the safety override pilot closes, reducing loading pressure to the main valve, which positions the main valve to maintain downstream

pressure as specied per ASME Boiler and Pressure

Vessel Code, section VIII.

In the event that the upstream valve fails, the downstream regulator will prevent downstream pressure from rising above safe operating levels.

It is recommended to install some type of warning system, such as a sentinel relief valve, to warn the operator that a valve has failed in the system. This will prevent prolonged operation with one valve, which could cause valve trim wear and noise associated with

operation at high di󰀨erential pressures.

When operating in most steam systems, valve setpoints should be in strict accordance to ASME Boiler and Pressure Vessel Code, section VIII. The Type 6492HM (or 6492HTM) safety override pilot should be set at 10 psig / 0.69 bar or 10% above maximum downstream operating pressure of the second valve, whichever pressure is greater. For example, most HVAC systems operate at 15 psig /

1.0 bar, so the safety override pilot should be set no higher than 25 psig / 1.7 bar.

Type 92C

LOADING REGULATOR

STRAINER

16A1547-A A2523-1

Figure 4. Typical Pressure-Loaded Type 92C Regulator Installation

Installation

WARNING

Personal injury, equipment damage or leakage due to escaping steam or bursting of pressure-containing parts may result if this regulator is overpressured or is installed where service conditions could exceed the

limits given in Specications section on

page 2 and on the appropriate nameplate, or where conditions exceed any ratings of the downstream piping or piping connections. To avoid such injury or damage, provide pressure-relieving or pressure-limiting devices to prevent service conditions from exceeding those limits. Type 92C regulators and their installations should be checked for compliance with all applicable codes such as the ANSI B31.1-1977 Power Piping standard and the ASME Boiler and Pressure Vessel code.

Use a qualied personnel when installing, operating,

and maintaining a Type 92C regulator. Make sure that there is no damage to or foreign material in the regulator and that all tubing and piping are clean and

unobstructed. Install the regulator so that ow direction

matches the arrow marked on the regulator body. Some typical Type 92C regulator installations are shown in Figures 3 and 4.

The Type 92C regulator may be installed in any orientation. However, the regulator should not be

BLEED RESTRICTION

OPTIONAL PIPING FOR

STEAM LOADING

TYPE 92C REGULATOR

BYPASS LINE

installed in a tall vertical pipeline where condensate

could collect and create a pressure head a󰀨ecting

regulator performance.

Apply steam-compatible pipe compound to the external pipeline threads. Then, using acceptable piping procedures, install the regulator into the pipeline.

If continuous operation of the system is required during inspection and maintenance, install a three-

valve bypass around the regulator. If the owing

medium contains solids, install a proper size strainer upstream of the regulator.

Pilot-Operated Regulator

The Type 6392 pilot has three 1/4 NPT connections located in the pilot body. For proper operation of a pilot-operated regulator, the pilot supply and the regulator loading connections should be installed

parallel to the ow direction arrow marked on the pilot

body as shown in Figure 10, and the downstream control line should be installed in the pilot body connection as shown in Figures 3 and 10. If a pilotoperated regulator is ordered, the pilot supply and the regulator loading connections will be made at the factory.

Note

Pilot is shown here above the main valve body for illustration purposes only. See Figures 1 and 10 for actual pilot position and appearance of pilot-supply line and loading-pressure tubing.

PILOT REGULATING SPRING

Type 92C Safety Override System

July 2008

Type 92C

Type 92C Safety Override System

July 2008

Type 92C

INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE LOADING PRESSURE

Type 92C Safety Override System

July 2008

Type 92C

INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE

INTERMEDIATE PRESSURE

LOADING PRESSURE

PILOT DIAPHRAGM

DOWNSTREAM BLEED HOLE

Type 92C

36A1546-B A2520-1

INLET PRESSURE

OUTLET PRESSURE

ATMOSPHERIC PRESSURE

LOADING PRESSURE

PILOT

SUPPLY

PILOT

VALV E

PLUG PILOT

MAIN VALVE SPRING

VALV E

SPRING

MAIN VALVE PLUG

DOWNSTREAM CONTROL LINE

MAIN VALVE DIAPHRAGM

PITOT TUBE

Figure 5. Operational Schematic of Pilot-Operated Type 92C Regulator

TYPE 6492HM SAFETY

OVERRIDE PILOT

TYPE 6392 PILOT

TYPE 92C MAIN VALVE

E0658

INLET PRESSURE

OUTLET PRESSURE

ATMOSPHERIC PRESSURE

LOADING PRESSURE

INTERMEDIATE PRESSURE

Figure 6. Type 92C with Type 6492HM Safety Override Pilot Operational Schematic

TYPE 6392 PILOT

TYPE 92C MAIN VALVE

Type 92C

Note

Since a clogged vent may cause improper regulator functioning, install and maintain the Type 92C regulator so that the Type 6392 pilot spring case vent remains clear and unobstructed.

To install a pilot-operated regulator:

1. Connect a downstream control line of at least 1/4 in. / 6.4 mm diameter pipe bushed down to the 1/4 NPT control line connection in the pilot body.

2. For both body-sized and swaged pipelines, locate the pipeline control line connection in a section of straight pipe at least 10 pipe diameters away from the regulator or swage.

3. Do not locate the pipeline control line connection in an elbow, swage or other area where turbulence or abnormal velocities may occur.

4. If the pilot is mounted with the control line in a position other than horizontal, make sure the control line is sloped away from the pilot so that condensate can drain into the pipeline.

5. Install a shuto󰀨 valve (not a needle valve) in

the control line to completely isolate the pilot during maintenance.

6. Install a pressure gauge in the control line or near the regulator to aid in setting the outlet pressure.

Each pilot-operated regulator is factory-set for the

pressure setting specied on the order. If no setting is specied, the unit is factory-set at 30 psig / 2.1

bar. In all cases, check the spring setting to make sure it is correct for the application.

Pressure-Loaded Regulators

device. In all cases, check the pressure setting to make sure it is correct for the application.

Startup

The maximum inlet pressure for a specic construction

is stamped on the main valve nameplate. Use pressure gauges to monitor upstream and downstream pressures during startup.

To put the regulator into operation:

1. Open the control line shuto󰀨 valve.

2. For a pilot-operated regulator, open the downstream block valve.

For a pressure-loaded regulator, open the shuto󰀨

valve in the pressure-loading piping or tubing.

3. Slowly open the upstream block valve.

4. If a bypass line is used, slowly close the bypass line block valve.

5. To adjust the downstream pressure, follow the appropriate procedure:

a. For a pilot-operated regulator, loosen the

jam nut (key 15, Figure 9). Turn the adjusting screw (key 16, Figure 9) into the spring case to increase the downstream pressure. Turn the adjusting screw out of the spring case to decrease the downstream pressure. When the required downstream pressure is maintained for several minutes, tighten the jam nut to lock the adjusting screw in position.

b. For a pressure-loaded regulator, refer

to the Instruction Manual of the pressureloading device for downstream pressure adjustment procedures.

To install a pressure-loaded regulator:

1. Install a shuto󰀨 valve in the pressure-loading

piping or tubing.

2. Connect the piping or tubing to the 1/4 NPT

connection in the diaphragm ange (key 2, Figure 8).

If the loading regulator used with the pressureloaded regulator does not provide internal relief, an atmospheric bleed (e.g., no. 60 drill size) is required if the loading supply is air, or a downstream bleed line is required if the loading supply is steam. This installation is shown in Figure 4.

The pressure setting of a pressure-loaded regulator is adjusted and determined by the pressure-loading

Safety Override Pilot Startup and Adjustment

1. Loosen adjusting screws of the Type 6492HM (or 6492HTM) safety override pilot and Type 6392 intermediate pilot on the upstream valve until there is no spring load. The screws should turn freely by hand.

2. Loosen the adjusting screw of the Type 6392 pilot on the downstream valve until there is no spring load.

3. Tighten the Type 6492HM (or 6492HTM) safety override pilot of the upstream valve all the way in to its highest spring setting.

Type 92C

LOADING REGULATOR

MAIN VALVE PLUG

36A1546-B A2947

INLET PRESSURE

LOADING PRESSURE

DOWNSTREAM PRESSURE

Figure 7. Operational Schematic of Pressure-Loaded

Type 92C Regulator

BLEED RESTRICTION

OPTIONAL PIPING FOR STEAM LOADING

MAIN VALVE DIAPHRAGM

PITOT TUBE

MAIN VALVE SPRING

4. Tighten the Type 6392 pilot of the upstream valve all the way in to its highest spring setting.

5. Tighten the Type 6392 pilot of the downstream valve to the desired downstream pressure.

6*. Loosen the Type 6392 intermediate pilot on

the upstream valve to the desired intermediate pressure (normally 50% of inlet pressure).

7. Loosen the Type 6492HM (or 6492HTM) safety

override pilot of the upstream valve until there is no spring load.

8. Tighten the Type 6392 pilot of the downstream valve all the way in to its highest spring setting.

9. Tighten the Type 6492HM (or 6492HTM) safety override pilot of the upstream valve to desired

pressure as specied per ASME Boiler and

Pressure Vessel Code, section VIII.

10.* Loosen the Type 6392 pilot of the

downstream valve to the desired downstream pressure setpoint.

*Fisher™ recommends establishing setpoint by tightening the adjusting screw.

Shutdown

To take the regulator out of operation:

1. If a bypass line is used, slowly open the bypass line block valve while monitoring the downstream pressure.

2. Close the upstream block valve.

3. For a pilot-operated regulator, close the downstream block valve.

For a pressure-loaded regulator, close the

shuto󰀨 valve in the pressure-loading piping

or tubing.

4. Close the control line shuto󰀨 valve.

5. Vent the regulator, the control line and the pilot supply line to release any trapped pressure.

Maintenance

Regulator parts are subject to normal wear and must be inspected periodically and replaced as necessary. The frequency of inspection and replacement depends upon the severity of service conditions and upon applicable Federal, state and local codes and regulations.

WARNING

Avoid personal injury or property damage from sudden release of pressure or uncontrolled steam or other process

uid. Before starting disassembly:

• Isolate the regulator from the process,

• Release process pressure, and

• Vent the pilot supply and main valve loading pressures.

This section contains separate procedures for regulator and pilot maintenance.

Type 92C Regulator

Perform these procedures when replacing diaphragm, the stem assembly, the valve plug or the orifice. Refer to the correct section for the required instructions. Key numbers refer to Figure 8 unless otherwise indicated.

The regulator may remain in the pipeline during maintenance procedures unless the valve body is to be replaced or removed for repairs. For pilot-operated regulators, the pilot may remain on the pipe nipple (key 23, Figure 10) unless the pilot body (key 1, Figure 9) is to be removed or the entire pilot replaced as a unit.

Type 92C

Replacing Diaphragm and Stem Assembly

1. For the pilot-operated regulator, unscrew the elbow and connector (keys 25 and 24, Figure 10) so that the loading tubing (key 22, Figure 10) can be removed.

For the pressure-loaded regulator, unscrew

the loading tubing (customer supplied) from the 1/4 NPT connection in the regulator diaphragm

ange (key 2).

2. Remove the cap screws (key 12) and the diaphragm

ange (key 2).

Lift out the upper diaphragm gasket (key 9), the

diaphragms (key 8), the lower diaphragm gasket and for Steel/Stainless Steel constructions, the diaphragm ring (key 15) and another diaphragm gasket (key 9).

3. Lift out the stem assembly (key 11) consisting of

the pusher plate and the stem. Check that the pitot tube (key 10) is clear and free of obstructions. Clean the parts. Check for wear, scratches, nicks and other damage, and replace parts as necessary.

4. Install the stem assembly (key 11) in the stem

guide bushing (key 6). Place one diaphragm gasket (key 9) in the regulator body (key 1).

For Steel/Stainless Steel constructions, place the

diaphragm ring (key 15) and another diaphragm

gasket (key 9) on top of the rst gasket.

For all constructions, place the two molded

diaphragms (key 8) with the raised circle up, another diaphragm gasket and the diaphragm

ange (key 2) on the body. Insert and tighten the

cap screws (key 12).

5. For the pilot-operated regulator, reconnect

the elbow, the loading tubing and the connector (keys 25, 22 and 24, Figure 10).

For the pressure-loaded regulator, reconnect

the pressure-loading tubing.

6. When maintenance is completed, refer to the

Startup section to put the regulator back in operation and to adjust the pressure setting.

Replacing Valve Plug and Orice

1. Remove the valve plug guide (key 5).

2. Remove the valve plug (key 4) and the valve

plug spring (key 7). Inspect the valve plug seating surface for nicks or scratches. Replace as necessary.

3. Unscrew the orice (key 3), and inspect the

seating surface for nicks and scratches. Replace if necessary.

4. Clean the valve plug guide, the valve plug, the

valve plug spring and the orice (keys 5, 4, 7

and 3, respectively).

5. Coat the orice threads with Never-Seez

equivalent lubricant. Then, being careful not to

damage the seating surface, thread the orice

(key 3) into the regulator body (key 1).

6. Place the valve plug spring (key 7) into the valve plug guide (key 5). Then slide the valve plug (key 4) over the spring and into the valve plug guide.

7. Apply Lok-Cease® 20/20 sealant or equivalent to the valve plug guide threads, and screw the valve plug guide (key 5) with attached parts into the regulator body (key 1), applying 130 to 160 ft-lbs / 176 to 217 N•m of torque.

8. When maintenance is completed, refer to the Startup section to put the regulator back in operation and to adjust the pressure setting.

Type 6392 Pilot

Perform this procedure if inspecting, cleaning or replacing any pilot parts. Key numbers refer to Figure 9

unless otherwise specied.

All pilot maintenance may be performed with the pilot body (key 1) attached to the pipe nipple and connector (keys 23 and 24, Figure 10) unless the pilot body must be removed or the pilot is to be replaced as a unit.

1. Loosen the jam nut (key 15), and turn the adjusting screw (key 16) counterclockwise until all compression is removed from the control spring (key 13). Remove the loading tubing from the pilot outlet connection. Remove the cap screws (key 17), spring case (key 2), control spring (key 13) and upper spring seat (key 14) from the body.

2. Remove the lower spring seat (key 9), the diaphragm

(key 7) and the diaphragm gasket (key 8) from the body. Lift out the stem assembly (key 6) consisting of the stem and the pusher plate. Clean the 1/16 in. / 1.6 mm diameter pilot bleed hole. Clean and replace parts as necessary, and assemble the stem assembly, the gasket, the diaphragm and the spring seat in the order shown in Figure 9.

Never-Seez® is a mark owned by Never-Seez Corp. Lok-Cease® is mark owned by Certied Laboratories.

Type 92C

3. Install the control spring (key 13), the lubricated upper spring seat (key 14) and the spring case (key 2). Insert and tighten the cap screws (key 17). Lubricate the adjusting screw (key 16) with Never-Seez® or equivalent lubricant, and thread it into the spring case.

4. Unscrew the valve plug guide (key 5). Remove the strainer screen (key 12), the valve plug (key 4), the valve plug cap (key 26) and the valve

plug spring (key 11). Unscrew the orice (key 3).

Clean and replace parts as necessary. Apply Never-Seez® or equivalent lubricant to the orice

threads, and screw the orice into place.

5. Place the valve plug spring (key 11) into the valve

plug guide (key 5). Insert the valve plug cap (key 26) into the valve plug (key 4), and then slide both parts over the spring and into the valve plug guide. Place the strainer screen (key 12) onto the valve plug guide. Apply Lok-Cease® 20/20 sealant or equivalent (key 21) to the valve plug guide threads, and screw the valve plug guide with the attached parts into the pilot body (key 1).

6. When maintenance is completed, refer to the Startup section to put the regulator back into operation, and adjust the pressure setting.

Types 6492HM and 6492HTM Safety Override Pilots

These 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 in this section required to correct the problem. Key numbers refer to Figure 11.

Note

Before performing any maintenance, loosen the hex nut (key 16), if used, and turn the adjusting screw (key 15) or handwheel (key 31) counterclockwise until all compression is removed from the control spring (key 12). Remove the pilot spring from the pipe nipple and connectors (keys 82 and 83, Figure 12).

2. Clean and replace parts as necessary. Apply

sealant to the orice threads. Thread the orice

into place and tighten using 19 to 25 ft-lbs / 26 to 34 N•m of torque.

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

4. Remove the pipe plug (key 74). Then remove the pipe plug (key 94). Clean and replace the pipe plugs as necessary.

5. Apply sealant to the threads of the pipe plug

(key 94) and install.

6. Apply sealant to the threads of the pipe plug

(key 74). Thread the pipe plug into place and tighten using 5 to 15 ft-lbs / 6.8 to 20 N•m of torque.

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), diaphragms (key 10) and diaphragm gasket (key 18) from the body. Inspect and clean the diaphragm gasket, and replace if necessary.

9. Unscrew the bellows retainer (key 8) and remove the bellows (key 9). Replace worn parts as necessary, and install the bellows and bellows retainer. Tighten the bellows retainer using 19 to 25 ft-lbs / 26 to 34 N•m of torque.

10. Install the diaphragm gasket. Install both diaphragms with their raised performed centers facing toward the spring case.

11. Lubricate the upper spring seat and the exposed

threads of the adjusting screw. Install the lower spring seat (key 11), control spring (key 12), upper spring seat (key 13) and spring case (key 14). Insert and tighten the cap screws (key 17) in a crisscross bolting pattern using 12 to 18 ft-lbs / 16 to 24 N•m of torque.

1. Unscrew the plug guide (key 2). Remove the screen (key 77), inner valve (key 4), plug spring

(key 3) and stem (key 7). Unscrew the orice (key 5). Examine the orice and plug seating

surfaces for damage.

Never-Seez® is a mark owned by Never-Seez Corp. Lok-Cease® is mark owned by Certied Laboratories.

Parts Ordering

When corresponding with your local Sales O󰀩ce about

this equipment, always specify the equipment serial number as found on the regulator nameplate.

When ordering replacement parts, specify the complete 11-character part number of each needed part as found in the following parts list.

Type 92C

Parts List

Regulator

Key Description Part Number

Parts Kit (included are keys 3, 4, 7, 8 and 9) For 1/2 and 3/4 NPT body

9/16 in. / 14 mm orice R92CX000042

For 1 NPT body

3/4 in. / 19 mm orice R92CX000032

1 Regulator Body Assembly with Bushing (See key 6 for bushing) Gray Cast Iron NPS 1/2 / DN 15 36A1539X012 NPS 3/4 / DN 20 36A1540X012 NPS 1 / DN 25 36A1541X012 Steel 1/2 NPT 36A1542X012 3/4 NPT 36A1543X012 1 NPT 36A1544X012 CL150 RF NPS 1/2 / DN 15 14B3428X012 NPS 3/4 / DN 20 14B3428X022 NPS 1 / DN 25 19A5459X012 CL300 RF NPS 1/2 / DN 15 14B3428X032 NPS 3/4 / DN 20 14B3428X042 NPS 1 / DN 25 14B0037X012 PN 16/25/40 RF NPS 1/2 / DN 15 14B3428X052 NPS 3/4 / DN 20 14B3428X062 NPS 1 / DN 25 14B3428X072 Stainless Steel 1/2 NPT 36A1542X022 3/4 NPT 36A1543X032 1 NPT 36A1544X022 CL150 RF NPS 1/2 / DN 15 14B3428X082 NPS 3/4 / DN 20 14B3428X092 NPS 1 / DN 25 19A5459X022 CL300 RF NPS 1/2 / DN 15 14B3428X102 NPS 3/4 / DN 20 14B3428X112 NPS 1 / DN 25 14B0037X022 PN 16/25/40 RF NPS 1/2 / DN 15 14B3428X122 NPS 3/4 / DN 20 14B3428X132 NPS 1 / DN 25 14B3428X142 2 Diaphragm Flange Gray Cast Iron 26A1533X012 Steel 26A1534X012 Stainless Steel 26A1534X022

3 Orice

For 1/2 and 3/4 NPT body, 9/16 in. / 14 mm, 416 Stainless Steel 16A1529X012 For 1 NPT body 3/4 NPT / 19 mm, 416 Stainless Steel 16A1528X012 For 3/4 and 1 NPT body, 9/16 in. / 14 mm, Ethylenepropylene (EPDM), 410/416 Stainless Steel 1E399535132 4 Valve Plug, heat-treated, 416 Stainless Steel 1E398146172 5 Valve Plug Guide Brass (for Gray Cast Iron body) 1E398214012 416 Stainless Steel (for Steel/Stainless Steel body) 1E398235132 6 Stem Guide Bushing, heat-treated 416 Stainless Steel (included in key 1) For Gray Cast Iron body 1E398535132 For Steel/Stainless Steel body 16A1530X012 7 Valve Plug Spring, Stainless Steel 1E398837022 8* Diaphragm, Stainless Steel (2 required) 1E399236012

Regulator (continued)

Key Description Part Number

9* Diaphragm Gasket (2 required for Gray Cast Iron body; 3 required for Steel/Stainless Steel body with Ethylenepropylene (EPDM) seat) 16A1526X012 Steel/Stainless Steel body with metal seat,

3 required 1E3993X0012 Steel/Stainless Steel body with metal seat (High temperature), 3 required 16A1526X022 10 Pitot Tube For Gray Cast Iron body, Copper NPT 16A1525X012 For Steel body, Copper NPT 1E399417012 CL150 RF 16A1525X012 CL300 RF and PN 16/25/40 1E399417012 For Stainless Steel body, 304 Stainless Steel NPT 1E399438072 CL150 RF 16A1525X022 CL300 RF and PN 16/25/40 1E399438072 11 Stem Assembly, 416 Stainless Steel 16A1524X012 12 Cap Screw, Zinc-plated steel (8 required) For Gray Cast Iron body 1A914524052 For Steel/Stainless Steel body 1A782024052 14 Drive Screw, Stainless Steel (2 required) 1A368228982 15 Diaphragm Ring For Steel body, Steel 16A1531X012 For Stainless Steel body, Stainless Steel 16A1531X022

Type 6392 Pilot (See Figure 10)

Key Description Part Number

Parts Kit (included are keys 3, 4, 8, 7, 11, 12 and 26) Standard Trim R6392X00012 1 Pilot Body Gray Cast Iron 26A1518X012 Steel 26A1517X012 Stainless Steel 26A1517X022 2 Spring Case Gray Cast Iron 2E391219012 Steel 2J127522012 Stainless Steel 2J1275X0012

3 Orice, heat-treated

416 Stainless Steel 16A1511X012 4 Valve Plug, heat-treated 416 Stainless Steel 16A1516X012 5 Valve Plug Guide Brass (for Gray Cast Iron pilot) 1E391814012 Heat-treated, 416 Stainless Steel (For Steel pilot) 1E391835132 For Gray Cast Iron and Steel pilot, Heat-treated, 416 Stainless Steel 1E391835132 For Stainless Steel pilot 1E391835072 6 Stem Assembly, 416 Stainless Steel For Stainless Steel seat 16A1515X012 For Ethylenepropylene (EPDM) seat 16A1515X022 7 Diaphragm, Stainless Steel (2 required) 1E392836012 8* Diaphragm Gasket Elastomer seat 1E393104022 Stainless Steel seat, Graphite 1E3931X0012 9 Lower Spring Seat, Aluminum 1E392309012 10 Stem Guide Bushing, 416 Stainless Steel 1E392235132 11 Valve Plug Spring, Stainless Steel 1E392437022 12 Strainer Screen, Stainless Steel 16A1512X012

*Recommended spare part

Type 92C

Type 6392 Pilot (See Figure 10) (continued)

Key Description Part Number

13 Control Spring, Standard springs, 416 Stainless Steel 5 to 70 psig / 0.34 to 4.8 bar, Green 1E392627012 20 to 150 psig / 1.4 to 10.3 bar, Red 1E392727142 Spring for use over 500°F / 260°C, 17-7 PH Stainless Steel 15 to 100 psig / 1.0 to 6.9 bar 14B9941X012 20 to 25 psig / 1.4 to 1.7 bar 14B9940X012 14 Upper Spring Seat, Zinc-plated steel 1B798525062 15 Jam Nut, Plate steel 1A352224122 16 Adjusting Screw, Plated steel 1E639928992 17 Cap Screw, Zinc-plated steel (6 required) For Gray Cast Iron body 1A407824052 For Steel/Stainless Steel body 1A391724052 26 Valve Plug Cap, heat-treated 416 Stainless Steel 16A1549X012

Type 6392 Pilot Mounting Parts

Key Description Part Number

22 Loading Tubing Copper 16A1527X012 Stainless Steel 16A1527X022 23 Pipe Nipple, Steel 1N584226232 24 Connector Brass 15A6002X212 Stainless Steel 15A6002X642 25 Elbow Brass 15A6002X172 Stainless Steel 15A6002X632

Types 6492HM and 6492HTM Safety Override Pilots (See Figure 12)

Key Description Part Number

1 Pilot Valve Body WCC Steel 22A0403X052 CF8M Stainless Steel 22A0403X072 2 Valve Guide, Stainless Steel Steel body, 416 Stainless Steel 1E391835132 Stainless Steel body, 316 Stainless Steel 1E391835072 3 Valve Spring, 302 Stainless Steel 1E392437022 4 Inner Valve Steel body, 416 Stainless Steel 1F967446172 Stainless Steel body, 316 Stainless Steel 1F9674X0012

5 Orice

Steel body, 416 Stainless Steel 1H564446172 Stainless steel body, 316 Stainless Steel 1H5644X0012 7 Valve Stem Steel body, 410/416 Stainless Steel 1F967835132 Stainless Steel body, 316 Stainless Steel 1F9678X0012 8 Bellows Retainer Steel body, Brass 1F971214012 Stainless Steel body, 316 Stainless Steel 1F9712X0012 9 Bellows Steel body, Brass 1F971318992 Stainless Steel body, 321 Stainless Steel 1F9713X0012 10 Diaphragm, 302 Stainless Steel (2 required) 1E395836012 11 Lower Spring seat Type 6492HM, Aluminum 1E395408012 Type 6492HTM Steel 1E3954X0052 Stainless Steel 14B9948X012

Types 6492HM and 6492HTM Safety Override Pilots (See Figure 12) (continued)

Key Description Part Number

12 Spring Type 6492HM, Steel 10 to 30 psig / 0.69 to 2.2 bar 1E395627022 25 to 75 psig / 1.7 to 5.2 bar 1D7455T0012 70 to 150 psig / 4.8 to 10.3 bar 1E395727192 Type 6492HTM, Stainless Steel 15 to 100 psig / 1.0 to 6.9 bar 14B9943X012 80 to 250 psig / 5.5 to 17.2 bar 14B9942X012 13 Upper Spring seat, Steel Type 6492HM 1D667125072 Type 6492HTM 14B9951X012 14 Spring Case Steel With standard adjusting screw 2L416322012 With sealed adjusting screw 2L442022012 Stainless Steel With standard adjusting screw 2L416333092 With sealed adjusting screw 2L4420X0012 15 Adjusting Screw, Steel Standard 1D995448702 Handwheel 1J496428982 16 Hex Nut, Zinc-plated steel 1A353724122 17 Cap Screw (8 required) Type 6492HM Steel 1A381624052 Stainless Steel 1A3816X0152 Type 6492HTM Steel 1A3816X0132 Stainless Steel 1A3816X0152 18 Diaphragm Gasket Type 6492HM, Composition 1E396104022 Type 6492HTM, Graphite 1E3961X0012 34 Machine Screw for use with handwheel, Steel 16A5763X012 38 Handwheel, Zinc 1J496144012 39 Lock Washer for use with handwheel, Steel 1A352332992 74 Pipe Plug Steel 0Z020128992 Stainless Steel 0Z020135072 77 Screen, 304 Stainless Steel 16A1512X012 78 Reducing Bushing Steel 1C379026232 Stainless Steel 1C3790X0012 87 Sealed Adjusting Screw Sealing Washer 1V205699012 94 Pipe Plug, Stainless Steel 1E823135042 95 Warning Label 19B0429X0A2

Type 6492HM Pilot Mounting Parts

Key Description Part Number

81 Tubing 0500103809W 82 Pipe Nipple (2 required) Steel 1C559926232 Stainless Steel 1C5599X0012 83 Connector Steel 15A6002XY72 Stainless Steel 15A6002X642 84 Elbow Steel 15A6002XY52 Stainless Steel 15A6002X632

*Recommended spare part

Type 92C

26A1536-A

APPLY SEALANT: S = ANTI-SEIZE COMPOUND

STEEL/STAINLESS STEEL CONSTRUCTION

GREY CAST IRON CONSTRUCTION

Figure 8. Type 92C Steam Regulator Assembly

16A1520-B

APPLY LUBRICANT/SEALANT: L = ANTI-SEIZE LUBRICANT S = ANTI-SEIZE COMPOUND

Figure 9. Type 6392 Pilot Assembly

Type 92C

36A1545-A A2521-1

1/4 NPT PILOT

SUPPLY CONNECTION

1/4 NPT REGULATOR

SUPPLY CONNECTION

1/4 NPT DOWNSTREAM

CONTROL LINE CONNECTION

Figure 10. Type 6392 Pilot Mounting Parts

E0660

Figure 11. Type 6492HM or 6492HTM Safety Override Pilot Assembly

Type 92C

TYPE 6492HM

E0659

TYPE 6392

Figure 12. Type 92C with Safety Override Pilot Assembly

91 82

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Fisher 92C Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual