Emerson Fisher 627H 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 627H Specifications

General

Brand	Emerson
Model	Fisher 627H
Category	Controller
Language	English

Summary

Introduction to 627 Series Regulators

Scope of the Manual

Outlines the instructions covered in this manual for the 627 Series regulators.

Product Description

Details the 627 Series direct-operated pressure reducing regulators and their applications.

627 Series Specifications Overview

Available Regulator Constructions

Lists the various types of 627 Series regulators and their features.

Pressure and Flow Ratings

Specifies maximum inlet/outlet pressures, orifice sizes, and flow coefficients.

Material and Temperature Capabilities

Covers elastomer temperature limits and body pressure ratings for different materials.

627 Series Principle of Operation

How the Regulator Works

Explains the mechanism of pressure reduction and flow control within the regulator.

Installation and Safety Precautions

Installation Steps and Guidelines

Provides essential steps and considerations for the proper installation of the regulator.

Startup and Shutdown Safety Warnings

Highlights critical safety measures for starting and stopping the regulator to prevent hazards.

De-Icer System and Overpressure Protection

Type 627M/627HM De-Icer System Application

Describes the use of a de-icer system to prevent ice formation in specific regulator models.

Overpressure Protection Mechanisms

Discusses how regulators provide overpressure protection and when additional measures are needed.

Startup and Adjustment Procedures

Regulator Startup Process

Details the safe procedure for bringing the regulator online, including pressure monitoring.

Pressure Setting Adjustment

Guides users on how to adjust the regulator's set pressure and important limits.

Maintenance, Shutdown, and Problem Indicators

Safe Shutdown Procedures

Steps to safely isolate and depressurize the regulator before performing maintenance.

Routine Maintenance and Inspection

Covers regular checks and replacement of key components like the disk and diaphragm.

Troubleshooting Problem Indicators

Explains how to interpret relief indicator signals for specific regulator models.

Body Area Maintenance Procedures

Replacing Disk Assembly and Orifice

Step-by-step guide for inspecting and replacing the disk assembly and orifice.

Replacing the Stem Assembly

Instructions for removing and reinstalling the stem assembly for various 627 Series types.

Diaphragm and Spring Case Maintenance

Diaphragm Assembly Service

Procedures for disassembling and reassembling the diaphragm assembly for different regulator models.

Parts Ordering Information

How to Order Replacement Parts

Guidance on identifying and ordering specific parts using part numbers and key references.