Instruction Manual
D100639X012
1B Actuator
April 2011
2
warnings. If you have any questions about these instructions, contact your Emerson Process Management sales office
before proceeding.
Description
The 1B pump governor actuator (figure 1) is used to maintain a constant discharge pressure on steam driven turbine
or reciprocating pumps and for pressure reducing or pressure relief applications. Typical pump governor applications
include fire pumps, boiler feedwater pumps, and industrial or refining pumps where the discharge medium is oil,
steam, air, or other noncorrosive fluid.
The 1BR pump governor actuator is combined with a push‐down‐to‐open valve for service as a relief governor. A relief
governor is used to divert excess pump discharge to the suction side of the pump.
Installation
WARNING
Always wear protective gloves, clothing, and eyewear when performing any installation operations to avoid personal
injury.
Personal injury or equipment damage caused by sudden release of pressure may result if the valve assembly is installed
where service conditions could exceed the limits given on the appropriate nameplates. To avoid such injury or damage,
provide a relief valve for over‐pressure protection as required by government or accepted industry codes and good
engineering practices.
Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section in this
instruction manual.
CAUTION
When ordered, the valve configuration and construction materials were selected to meet particular pressure, temperature,
pressure drop, and controlled fluid conditions. Responsibility for the safety of process media and compatibility of valve
materials with process media rests solely with the purchaser and end‐user. Since some valve body/trim material
combinations are limited in their pressure drop and temperature ranges, do not apply any other conditions to the valve
without first contacting your Emerson Process Management sales office.
The 1B pump governor can be installed either above or below the line but if possible it should be installed above it.
CAUTION
Thoroughly clean and blow out all pipe scale and other foreign matter. It is recommended that a Fisher strainer be installed
in the line ahead of the main valve to protect the governor while in service.
If continuous operation is desired during inspection or maintenance, install a conventional three‐valve bypass around
the governor.
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