Emerson Fisher LR125 User Manual

Instruction Manual
D103576X012
January 2020
Type LR125
!
WARNING
Type LR125 Pressure Reducing Liquid Regulator
TYPE LR125 REGULATOR TYPE MR95H/MR95HP PILOT
Figure 1. Type LR125 Pressure Reducing Liquid Regulator and Type MR95H/MR95HP Pilot
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™ 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 discharges process
uid 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 qualied service person to service
the unit. Installation, operation and
maintenance procedures performed
by unqualied personnel may result
in improper adjustment and unsafe
operation. Either condition may result in
equipment damage or personal injury.
Only a qualied person must install or
service the regulator.
The Type LR125 is designed for liquid
service. Do not operate the regulator
in applications where temperatures are
below the process uid’s freezing point
or above its boiling point which are
dependent on the process uid and the
application pressures.

Emerson Fisher LR125 Specifications

General

Brand	Emerson
Model	Fisher LR125
Category	Controller
Language	English

Summary

Type LR125 Specifications

Type LR125 Construction Materials

Details the materials used for the Type LR125 main valve and pilot components.

Type LR125 Pilot Type Description

Describes the MR95H and MR95HP pressure reducing pilots used with the Type LR125.

Type LR125 Operation and Installation

Type LR125 Principle of Operation

Explains how the Type LR125 pressure reducing liquid regulator functions.

Type LR125 Installation Guidelines

Provides critical safety and procedural guidance for installing the Type LR125 regulator.

Startup, Adjustment, and Shutdown

Type LR125 Startup Procedure

Step-by-step instructions for safely starting up the Type LR125 regulator.

Type LR125 Pilot Adjustment

Guidance on adjusting the outlet pressure setting of the pilot for the Type LR125.

Type 112 Restrictor Setting Guide

Recommendations for setting the Type 112 restrictor for optimal regulator performance.

Type LR125 Shutdown Procedure

Instructions for safely shutting down and isolating the Type LR125 regulator.

Maintenance and Troubleshooting

Type LR125 Main Valve Trim Parts

Details on the parts for the Type LR125 main valve trim and their references.

Type LR125 Disassembly and Assembly

Procedures for safely disassembling and reassembling the Type LR125 regulator.

Diaphragm and Plug Assembly Maintenance

Instructions for maintaining or replacing the diaphragm and plug assembly.

Travel Indicator Assembly Maintenance

Procedures for maintaining the travel indicator assembly of the Type LR125.

Pilot Maintenance Procedures

Maintenance instructions for the Type MR95H and MR95HP pilots.

Type LR125 Troubleshooting Guide

A guide to identify and resolve common issues with the Type LR125 regulator.

Type 112 Restrictor Maintenance

Procedures for maintaining the Type 112 restrictor, including cleaning.

Type LR125 Parts Ordering and List

Information on ordering replacement parts and a list of available parts.