167D Series
Instruction Manual
Form 5859
June 2011
D103234X012
www.fi sherregulators.com
167D Series Switching Valves
TYPE 167D TWO-WAY SWITCHING VALVE
TYPE 167DA THREE-WAY SWITCHING VALVE
Figure 1.
167D Series Switching Valves
!
WARNING
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion,
fi re 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 unqualifi ed
personnel may result in improper
adjustment and unsafe operation. Either
condition may result in equipment
damage or personal injury. Use qualifi ed
personnel when installing, operating,
and maintaining the 167D Series
switching valves.
Introduction
Scope of the Manual
This manual provides instructions for the installation,
maintenance, and parts ordering for the 167D Series
Switching Valves. Instructions and parts lists for other
equipment mentioned in this instruction manual, as
well as for other switching valves are found in
separate manuals.
P1184
P1185
