Emerson Fisher 634 Instructional Manual

Instructional Manual
D100638X012
December 2018
Types 634 and 634M High-Pressure Shutoff Valves
W4128
TyPe 634M SHuToff ValVe wiTH
STandard PiPe PlugS in body Side TaPPingS
!
failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion,
fire and/or chemical contamination
causing property damage and personal
injury or death.
fisher™ shutoff valve 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 a leak develops or if the outlet
continually vents gas, service to the
unit may be required. failure to correct
trouble could result in a hazardous
condition. Only a qualified person shall
install or service the unit.
Call a qualified service person to service
the unit. installation, operation and
maintenance procedures performed
Figure 1. Typical Constructions
warning
Types 634 and 634M
W4156-1
TyPe 634 SHuToff ValVe wiTH
oPTional Tank ValVe in uPSTreaM body Side TaPPing
by unqualified person 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 Types 634 and 634M
shutoff valves.
introduction
Scope of the Manual
This manual provides installation, maintenance, and
parts information for the Types 634 and 634M high-
pressure shutoff valves. Refer to separate instruction
manuals for information on regulators used with these
high-pressure shutoff valves.

Product description

Types 634 and 634M high-pressure shutoff valves
(Figure 1) serve to provide overpressure protection by
containment. The Type 634 shutoff valve with internal
registration is installed between a pressure-reducing