Type 122A
D100263X012
January 2016
Instruction Manual
Form 2279
www.fisherregulators.com
Type 122A Three-Way Switching Valve
!
WARNING
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
®
switching valves 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 switching valve 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.
Installation, operation and maintenance
procedures performed by unqualified
personnel may result in improper
adjustment and unsafe operation. Either
condition may result in equipment
damage or personal injury. Only
qualified personnel shall install, operate
and maintain the Type 122A three-way
switching valve.
Introduction
Scope of the Manual
This Instruction Manual includes installation,
adjustment, maintenance and parts ordering
information for the Type 122A three-way
switching valve.
Description
The Type 122A three-way switching valve (see
Figure 1) is a high-capacity, economical three-way
pneumatic switching valve for on-off applications. This
valve can be used for diverging or converging gaseous
service, diverging liquid service with gas-loaded liquids
and converging liquid service. Six spring ranges are
available for control pressures from 3 to 150 psig /
0.21 to 10.3 bar.
Figure 1.
Type 122A Three-Way Switching Valve
W3141-1
