Fisher DA Series Instruction Manual

Instruction Manual
Form 1777
June 1998
Design D and DA Valves
Introduction
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Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ceramic Trim
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Installation
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Maintenance
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Packing Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . .
Packing Maintenance . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing Packing . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trim Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lapping Metal Seats . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Ordering
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Parts Kits
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Parts List
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Scope of Manual

This instruction manual includes installation, mainte-
nance, and parts information for the Design D and DA
valves. Refer to separate manuals for instructions cov-
ering the actuator, positioner, and accessories.
Only persons qualified through training or experience
should install, operate, and maintain this valve. If you
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W0232- / IL
Figure 1. Design D Valve with Type 657 Actuator
have any questions about these instructions, contact
your Fisher Controls sales office or sales representa-
tive before proceeding.
Designs D & DA