Fisher® CAV4 Control Valve0 pages

Instruction Manual

CAV4 Valve

D100384X012

July 2014

Fisherr CAV4 Control Valve
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Educational Services . . . . . . . . . . . . . . . . . . . . . . . . . 3
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . 5
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Packing Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Packing Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 8
Packing Replacement . . . . . . . . . . . . . . . . . . . . . 8
Trim Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Trim Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Use of Optional Flushing Trim . . . . . . . . . . . . . . . . . 19
Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Parts Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 1. Fisher CAV4 Control Valve with 657
Actuator

657 ACTUATOR

CAV4
CONTROL VALVE

W2700-1*

Introduction
Scope of Manual
This manual includes installation, maintenance, and parts ordering information for the Fisher CAV4 control valve and
Cavitrol™ IV trim. Information on the flushing trim is also provided. Refer to separate manuals for information
concerning the actuator, positioner, and other accessories used with this control valve.
Do not install, operate, or maintain a CAV4 control valve without being fully trained and qualified in valve, actuator,
and accessory installation, operation, and maintenance. To avoid personal injury or property damage, it is important
to carefully read, understand, and follow all the contents of this manual, including all safety cautions and warnings. If
you have any questions about these instructions, contact your Emerson Process Management sales office before
proceeding.

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