D100386X012
Design D and DA Valves
Introduction
1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of Manual 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ceramic Trim
2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation
2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance
3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Packing Lubrication 4. . . . . . . . . . . . . . . . . . . . . . . . . .
Packing Maintenance 4. . . . . . . . . . . . . . . . . . . . . . . . .
Replacing Packing 4. . . . . . . . . . . . . . . . . . . . . . . . . . .
Trim Maintenance 6. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lapping Metal Seats 6. . . . . . . . . . . . . . . . . . . . . . . . .
Assembly 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Ordering
7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Kits
7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List
8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction
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
Figure 1. Design D Valve with Type 657 Actuator
W0232– / IL
have any questions about these instructions, contact
your Fisher Controls sales office or sales representa-
tive before proceeding.
Instruction Manual
Form 1777
June 1998
Designs D & DA
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