Emerson Fisher SS-263 Instruction Manual

Volume booster
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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

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  Summary of Contents for Emerson Fisher SS-263

  • Page 1: Table Of Contents

    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.
  • Page 2: Specifications

    Instruction Manual SS-263 Volume Booster August 2011 D103542X012 Table 1. Specifications Port Diameters Supply Pressure Ranges Supply pressure also must not exceed the maximum Supply Port: 19 mm (0.75 inch) pressure rating of the actuator. Exhaust Port: 19 mm (0.75 inch) Up to 10.3 bar (150 psig) Operative Temperature Limits -40 to 71_C (-40 to 160_F)
  • Page 3: Mounting

    Instruction Manual SS-263 Volume Booster D103542X012 August 2011 Check with your process or safety engineer for any additional measures that must be taken to protect against process media. Mounting The volume booster is typically nipple-mounted between the pneumatic supply source and the actuator. 1 NPT schedule 80 pipe fittings are recommended for aluminum constructions.
  • Page 4: Principle Of Operation

    Instruction Manual SS-263 Volume Booster August 2011 D103542X012 Figure 3. Volume Booster Sectional View INPUT SIGNAL DIAPHRAGM ASSEMBLY BYPASS RESTRICTION ADJUSTING SCREW BYPASS RESTRICTION EXHAUST PORT EXHAUST INPUT DIAPHRAGM PASSAGES FEEDBACK DIAPHRAGM OUTPUT TO DIAGNOSTIC PORT ACTUATOR SUPPLY PORT SUPPLY Principle of Operation Refer to figure 3.
  • Page 5: Diaphragm Assembly Replacement

    Instruction Manual SS-263 Volume Booster D103542X012 August 2011 Check with your process or safety engineer for any additional measures that must be taken to protect against process media. Diaphragm Assembly Replacement CAUTION Key numbers refer to figures 4 and 6. Figure 4.
  • Page 6: Valve Assembly Replacement

    Instruction Manual SS-263 Volume Booster August 2011 D103542X012 CAUTION To avoid damage to the diaphragms, do not overtighten the screws. 9. Replace the six cap screws (key 10) and tighten them in a crisscross manner using multiple patterns working up to a final torque of 15.8 N•m (140 lbf•in).
  • Page 7: Parts Ordering

    Use only genuine Fisher replacement parts. Components that are not supplied by Emerson Process Management should not, under any circumstances, be used in any Fisher instrument. The use of components not manufactured by Emerson Process Management will void your warranty, might adversely affect the performance of the instrument, and could give rise to personal injury and property damage.
  • Page 8 Fisher is a mark owned by one of the companies in the Emerson Process Management business division of Emerson Electric Co. Emerson Process Management, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners.