Fisher EHD series Instruction Manual

Instruction Manual
D100392X012
Fisher EHD and EHT NPS 8 through 14
™
Sliding-Stem Control Valves
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Educational Services
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Principle of Operation
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Packing Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . .
Packing Maintenance
Replacing Packing
Trim Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EHD, EHT Valve Plug Maintenance
Lapping Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trim Replacement . . . . . . . . . . . . . . . . . . . . . . . . . .
Retrofit: Installing Bore Seal Trim
Replacement of Installed Bore Seal Trim
Trim Removal (Bore Seal Constructions)
Lapping Metal Seats
(Bore Seal Constructions)
Remachining Metal Seats
(Bore Seal Constructions)
Trim Replacement
(Bore Seal Constructions)
Actuator Mounting . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bonnet Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction

Scope of Manual

This instruction manual includes installation, maintenance, and parts ordering information for NPS 8 through 14 Fisher
EHD and EHT sliding-stem globe-style control valves. Refer to separate manuals for instructions covering the actuator,
positioner, and accessories.
Do not install, operate, or maintain an EH 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
proceeding.
www.Fisher.com
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Figure 1. Fisher EH Series Control Valve
with 667 Actuator
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1
2
2
3
3
5
5
6
7
7
12
12
13
14
17
19
. . . . 19
20
20
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22
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25
W2992-1
25
26
Emerson sales office
EH Valves NPS 8 through 14
or Local Business Partner before
June 2017