Types EZH and EZHSO Pressure Reducing Regulators
Contents
Introduction .............................................................. 2
Characteristics ......................................................... 3
Labelling .................................................................. 5
Dimensions and Weights ......................................... 6
Description ............................................................... 8
Principle of Operation ............................................... 8
Monitoring Systems .................................................. 11
Installation ............................................................... 13
Startup and Adjustment ........................................... 15
Shutdown ................................................................. 17
Maintenance ............................................................ 17
Troubleshooting ....................................................... 24
Spare Parts .............................................................. 25
Parts List .................................................................. 26
WARNING
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion
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. 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.
Call a gas service person to service the
or service the regulator.
Figure 1. Type EZH Pressure Reducing Regulator
R94
Figure 2. PRX Series Pressure Reducing Pilots
TYPE PRX-120/APTYPE PRX-120
Types EZH, EZHSO, EZH OS2 and EZHSO OS2
regulators are in conformity with the
Pressure Equipment Directive
PED 2014/68/EU and are classied in Category IV.
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