Emerson Fisher 92B Instruction Manual

Instruction Manual
D100703X012
July 2019

Type 92B Pressure Reducing Valve

!
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion,
fire and/or chemical contamination
causing property damage and personal
injury or death.
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.
(Emerson) instructions.
If the regulator vents gas or a leak
develops in the system, service to the unit
may be required. Failure to correct trouble
could result in a hazardous condition.
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 92B regulator.

Introduction

Scope of the Manual
This manual provides instructions for installation,
startup, maintenance and parts ordering information
for the Type 92B Valve. Instructions and parts lists for
other equipment used with these valves are found in
separate manuals. The Type 92B is also available with
a Type 6492HM or 6492HTM safety override pilot.

Product Description

The Type 92B Pressure Reducing Valve is the
standard steam valve for industry. It can withstand
WARNING
W8264
Figure 1. Type 92B Pressure Reducing Valve
dirty operating environments while providing accurate
and stable pressure control. The Type 92B is applied
as a main pressure reducing valve in industrial
process heating applications such as heat exchangers,
evaporators, digesters and reactors. Commercial
applications include pressure reducing valves for
meter runs found in district energy systems, hot
water heat exchangers, absorption chillers and boiler
deaerator tanks.
A Type 6492HM safety override pilot is available for
the Type 92B. The Type 92B pilot is used in a series
installation with the Type 6492HM safety override pilot
installed on the upstream valve. The Type 6492HM
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 steam pressure does not exceed 400 psig /
27.6 bar. Local codes and standards may require
approval by an appropriate authority prior to installation.
Type 92B