Instruction Manual
D103542X012
Fisherr SS-263 Volume Booster
Contents
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Introduction
Scope of Manual
This instruction manual provides installation, operation, maintenance, and parts information for the SS-263 volume
booster (figure 1). Refer to separate instruction manuals for information regarding the valve body, actuator, and other
accessories.
Do not install, operate, or maintain an SS-263 volume booster without first being fully trained and qualified in valve,
actuator and accessory installation, operation and maintenance, and carefully reading and understanding the contents
of this manual, including all safety cautions and warnings. If you have any questions regarding these instructions,
contact your Emerson Process Management sales office before proceeding.
Description
The SS-263 volume booster is used exclusively on Fisher Optimized Digital Valve (ODV) assemblies. The booster
amplifies the output signal from the FIELDVUE™ digital valve controller to increase the stroking speed of pneumatic
actuators. It has fixed deadband and incorporates soft-seat construction for use with the Fisher 377 Trip Valve.
The booster features dynamically stabilized trim and integral bypass restriction for use with the digital valve controller.
The SS-263 volume booster delivers high-volume output for fast stroking speeds when responding to large input
signal changes. However, it also delivers smooth, stable, low-volume output when responding to small input signal
changes. This allows stable, accurate throttling control which is often necessary during the startup or commissioning
of process control equipment.
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Figure 1. Fisher SS-263 Volume Booster
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SS-263 Volume Booster
August 2011