Type MR105
D103246X012
December 2014
Instruction Manual
Form 5874
www.fisherregulators.com
Type MR105 Direct-Operated Pressure
Reducing Regulators
!
WARNINg
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion,
fi re 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 unqualifi ed
personnel may result in improper
Figure 1.
Type MR105 Direct-Operated Pressure
Reducing Regulators
adjustment and unsafe operation. Either
condition may result in equipment damage
or personal injury. Call a qualifi ed
personnel when installing, operating and
maintaining the Type MR105 regulator.
TYPE MR105 WITH
HIgH-PRESSURE ACTUATOR
TYPE MR105 WITH
LOW-PRESSURE ACTUATOR
Contents
Introduction ..................................................................2
Specifications ..............................................................2
Principle of Operation ..................................................3
Installation ...................................................................4
Overpressure Protection..............................................8
Startup .........................................................................8
Adjustment...................................................................9
Shutdown.....................................................................9
Maintenance ..............................................................10
Parts List....................................................................16
P1204
P1205
