Emerson Fisher 627 Series Instruction Manual

Instruction Manual
D101328X012
March 2020
627 Series Pressure Reducing Regulators
!
Failure to follow these instructions or to
properly install and maintain this equipment
could result in an explosion and/or fire
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. 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 qualified 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.
!
Personal injury, property damage, equipment
damage or leakage due to escaping gas or
bursting of pressure-containing parts may
WARNING
WARNING
W4793
Figure 1. Typical 627 Direct-Operated
Pressure Reducing Regulator
result if this regulator is overpressured or
is installed where service conditions could
exceed the limits given in the Specifications
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 those limits.
The Type 627R, 627LR or 627MR regulator
with internal relief will provide downstream
overpressure protection within the limits
given in the Specifications section, Tables 1,
2, 3 and 4. If these limits are exceeded,
additional downstream overpressure
protection must be provided by the user.
Additionally, physical damage to the regulator
could cause personal injury or property
damage due to escaping gas. To avoid such
injury or damage, install the regulator in a
safe location.
627 Series