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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.
Emerson Control 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.
(Emerson) instructions.
If the control 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 a
qualified person shall install or service
the Type J control valve.
Introduction
Scope of the Manual
This manual provides instructions for the installation,
start-up, setting, maintenance, troubleshooting and
parts ordering for Type J control valve.
Product Description
Type J control valve is a single-seated, top-guided
compact pneumatic globe control valve with a
streamlined body designed for steam, water, gas and
Spence Type J Control Valve
Figure 1.
Type J Control Valve
process applications in typical institutional, commercial
and industrial processes. Type J is available with
either a direct or reverse acting actuator and meets
most installation requirements.
The actuator is made of stainless steel hardware
with a maximum deadband of 0.3 psig / 0.02 bar.
The valve trim is made of 316 stainless steel with
replaceable threaded seats for easy maintenance.
Standard packing is spring-loaded Teflon V-Rings.
Optional graphite or high temperature packing
is available. The valve conforms to NEMUR 4 for
mounting of accessories.
Principle of Operation
The Type J Control Valve is a flow-to-open, globe
style, pneumatic diaphragm actuated control valve. It
can be arranged to operate with either air-to-close or
air-to-open control.
A controller sensing the controlled variable provides an
air signal to the actuator of the control valve to obtain
the desired control.
Type J
November 2021
Instruction Manual
VCIMD-14934
