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Instruction Manual
D100255X012
August 2021
Type 92C Steam Regulator
▲
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 unqualified
personnel may result in improper
adjustment and unsafe operation. Either
condition may result in equipment damage
or personal injury. Use qualified 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.
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 pressure-
loaded 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
WARNING
W3111_2
Figure 1. Type 92C Pilot-Operated Regulator
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.
▲
The Type 92C safety override system
does not provide positive shutoff 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
WARNING
Related Manuals for Emerson Fisher 92C
Summary of Contents for Emerson Fisher 92C
- Page 1 ▲ 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 unqualified personnel may result in improper W3111_2 adjustment and unsafe operation.
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Page 2: Specifications
Type 92C Specifications This section lists the specifications for Type 92C regulator. Additional specifications for an individual regulator are found on the regulator body and pilot nameplates. Body Sizes and End Connection Styles Orifice Sizes NPS 1/2 / DN 15 Main Valve: BODY MATERIAL SIZE 9/16 in. - Page 3 Type 92C TYPE 92C REGULATOR PILOT LOADING LINE PILOT SUPPLY PRESSURE DROP ACROSS VALVE (bar) DOWNSTREAM TYPE 6392 PILOT CONTROL LINE 3/4 in. / 19 mm orifice size TOP VIEW OF REGULATOR AND PILOT CONNECTIONS TYPE 6392 PILOT DOWNSTREAM CONTROL LINE 9/16 in.
- Page 4 Type 92C TYPE 92C MAIN VALVE TYPE 92C MAIN VALVE TYPE 6392 PILOT TYPE 6392 PILOT TYPE 6492HM SAFETY OVERRIDE PILOT TOP VIEW TYPE 6492HM SAFETY OVERRIDE PILOT TYPE 6392 PILOT TYPE 6392 PILOT TYPE 92C MAIN VALVE TYPE 92C MAIN VALVE SIDE VIEW E0656 BLOCK VALVE...
- Page 5 Type 92C Note When downstream pressure increases, it registers under the diaphragm and forces the stem and plug To determine required loading pressure, to move upward. The upward force of the spring add the diaphragm differential pressure causes the valve to close, which decreases flow to to the desired outlet pressure setting.
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Page 6: Installation
Type 92C LOADING REGULATOR BLEED RESTRICTION OPTIONAL PIPING FOR STEAM LOADING STRAINER TYPE 92C REGULATOR BYPASS LINE 16A1547-A A2523-1 Figure 4. Typical Pressure-Loaded Type 92C Regulator Installation Installation installed in a tall vertical pipeline where condensate could collect and create a pressure head affecting regulator performance. - Page 7 Type 92C July 2008 Type 92C Safety Override System PILOT REGULATING SPRING PILOT DIAPHRAGM DOWNSTREAM BLEED HOLE DOWNSTREAM PILOT CONTROL LINE SUPPLY PILOT MAIN VALVE VALVE DIAPHRAGM PLUG PILOT VALVE SPRING PITOT TUBE MAIN VALVE PLUG July 2008 MAIN VALVE SPRING Type 92C Safety Override System 36A1546-B A2520-1...
- Page 8 Type 92C Note device. In all cases, check the pressure setting to make sure it is correct for the application. Since a clogged vent may cause improper regulator functioning, install Startup and maintain the Type 92C regulator so that the Type 6392 pilot spring case vent The maximum inlet pressure for a specific construction remains clear and unobstructed.
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Page 9: Maintenance
Type 92C Shutdown BLEED RESTRICTION LOADING REGULATOR To take the regulator out of operation: OPTIONAL PIPING 1. If a bypass line is used, slowly open the FOR STEAM LOADING bypass line block valve while monitoring the downstream pressure. 2. Close the upstream block valve. MAIN VALVE 3. - Page 10 Type 92C Replacing Diaphragm and Stem Assembly 3. Unscrew the orifice (key 3), and inspect the seating surface for nicks and scratches. Replace 1. For the pilot-operated regulator, unscrew the if necessary. elbow and connector (keys 25 and 24, Figure 10) 4.
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Page 11: Parts Ordering
Type 92C 3. Install the control spring (key 13), the lubricated 2. Clean and replace parts as necessary. Apply upper spring seat (key 14) and the spring case sealant to the orifice threads. Thread the orifice (key 2). Insert and tighten the cap screws (key 17). into place and tighten using 19 to 25 ft-lbs / 26 to Lubricate the adjusting screw (key 16) with 34 N•m of torque. - Page 12 Type 92C Parts List Regulator (continued) Description Part Number Regulator Diaphragm Gasket (2 required for Gray Cast Iron body; Description Part Number 3 required for Steel/Stainless Steel body with Parts Kit (included are keys 3, 4, 7, 8 and 9) Ethylenepropylene (EPDM) seat) 16A1526X012 For 1/2 and 3/4 NPT body...
- Page 13 Type 92C Type 6392 Pilot (See Figure 10) (continued) Types 6492HM and 6492HTM Safety Override Pilots Description Part Number (See Figure 12) (continued) Control Spring, Standard springs, 416 Stainless Steel Description Part Number 5 to 70 psig / 0.34 to 4.8 bar, Green 1E392627012 20 to 150 psig / 1.4 to 10.3 bar, Red 1E392727142...
- Page 14 Type 92C STEEL/STAINLESS STEEL CONSTRUCTION 26A1536-A APPLY SEALANT: GREY CAST IRON CONSTRUCTION S = ANTI-SEIZE COMPOUND 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...
- Page 15 Type 92C 1/4 NPT DOWNSTREAM CONTROL LINE CONNECTION 1/4 NPT REGULATOR SUPPLY CONNECTION 1/4 NPT PILOT SUPPLY CONNECTION 36A1545-A A2521-1 Figure 10. Type 6392 Pilot Mounting Parts E0660 Figure 11. Type 6492HM or 6492HTM Safety Override Pilot Assembly...
- Page 16 Technologies, Inc. All rights reserved. 08/21. Emerson Automation Solutions The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Fisher™ is a mark owned by Fisher Controls International LLC, a...