Call a qualified service person to service
the unit. 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. Only a qualified person must
install or service the relief valve or
backpressure regulator.
The Type LR128 is designed for liquid
service. Do not operate the regulator
in applications where temperatures are
below the process fluid’s freezing point
or above its boiling point which are
dependent on the process fluid and the
application pressures.
!
Type LR128 Relief Valve or
Backpressure Liquid Regulator
Figure 1. Type LR128 Relief Valve or Backpressure Regulator and Type MR98H Pilot
TYPE LR128 REGULATOR TYPE MR98H PILOT
WARNING
Failure to follow these instructions or
to properly install and maintain this
equipment could result in bursting
of the equipment and/or chemical
contamination causing property damage
and personal injury or death.
Fisher™ relief valves and backpressure
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 relief valve or backpressure regulator
discharges process fluid or a if leak
develops in the system, service to the unit
may be required. Failure to correct trouble
could result in a hazardous condition.
Type LR128
August 2019
Instruction Manual
D103578X012
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