Emerson Fisher 627 User Manual

www.fisherregulators.com
D101328X012
May 2013
627 Series
Instruction Manual
Form 5252
627 Series Pressure Reducing Regulators
!
WARNING
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion
and/or re 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.
(Regulator Technologies) 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
unit. Only a qualied person must install
or service the regulator.
Introduction
Scope of the Manual
This manual provides instructions for the installation,
adjustment, maintenance, and parts ordering information
for the 627 Series regulators. These regulators are
usually shipped separate for line installation, although
sometimes they are shipped installed on other
equipment. Refer to the Instruction Manual of the other
equipment for installation and operating instructions.
Description
The 627 Series direct-operated pressure reducing
regulators (Figure 1) are for high and low pressure
systems. These regulators can be used with natural
gas, air, or a variety of other gases. Performance
characteristics vary according to construction.
W4793
Figure 1. Typical 627 Direct-Operated
Pressure Reducing Regulator
!
WARNING
Personal injury, property damage,
equipment damage, or leakage due to
escaping gas or bursting of pressure-
containing parts may result if this
regulator is overpressured or is installed
where service conditions could exceed
the limits given in the Specications
section, Tables 1, 2, 3, and 4, or where
conditions exceed any ratings of the
adjacent piping or piping connections.
To avoid such injury or damage, provide
pressure-relieving or pressure-limiting
devices (as required by the appropriate
code, regulation, or standard) to prevent
service conditions from exceeding

Emerson Fisher 627 Specifications

General

Brand	Emerson
Model	Fisher 627
Category	Controller
Language	English

Summary

627 Series Pressure Reducing Regulators

Critical Safety Warnings

Critical safety warnings regarding installation, operation, and potential hazards to prevent injury or death.

Manual Introduction and Product Overview

Details the manual's scope and provides a general description of the 627 Series regulators.

627 Series Specifications

Regulator Types and Construction Details

Details regulator types, construction, pressure/temperature limits, and materials.

Performance, Flow, and Sizing Data

Provides data on orifices, relief, flow coefficients, and de-icer systems for performance and sizing.

Pressure Registration and Weights

Explains pressure registration methods and lists approximate regulator weights.

627 Series Product Details

Product Description and Variants

Describes 627 and 627H regulators, including Long Body variant.

Operational Principle and Safety Precautions

Explains the operational mechanism and a key safety warning.

627 Series Installation Guide

General Installation Steps

General installation steps applicable to all regulator types.

Specific Installation Notes and Hazards

Special instructions for mounted units and gas venting hazards.

Model-Specific Installation and Features

Installation for 627M/627HM/627MR Models

Installation steps specific to 627M, 627HM, and 627MR regulators.

Vent Lines and Overpressure Protection

Guidance on remote vent lines and overpressure protection principles.

627 Series Startup and Adjustment

Startup Procedures and Safety

Procedures and safety warnings for initiating regulator operation.

Adjustment Guidance Note

Note on using pressure gauges for adjustments.

Regulator Operation and Adjustment

Initiating Regulator Startup

Steps for initiating regulator operation.

Performing Pressure Adjustment

Guidance on how to adjust the regulator's pressure setting.

627 Series Shutdown and Maintenance

Shutdown Procedures and Safety

Procedures and safety warnings for safely shutting down the regulator.

Maintenance and Problem Identification

Maintenance overview and identification of potential problems for specific models.

Body Area Maintenance Procedures

Replacing Disk Assembly or Orifice

Detailed steps for replacing the disk assembly or orifice.

Replacing Stem Assembly

Detailed steps for replacing the stem assembly.

Diaphragm Maintenance for Specific Models

Maintenance for 627M/627HM/627MR

Maintenance steps for diaphragm assemblies on specific regulator models.

Diaphragm and Spring Case Maintenance

General Diaphragm/Spring Case Steps

General procedures for accessing diaphragm and spring case components.

Specific Diaphragm Assembly Maintenance

Detailed steps for diaphragm assembly maintenance for various regulator types.

627 Series Parts Information

Parts Ordering and List

Information on ordering replacement parts and a comprehensive parts list.

Emerson Contact Information

Emerson Divisions Contact Details

Contact details for Emerson Process Management divisions.