Fisher EHD Instruction Manual

Instruction Manual
D100392X012
April 2009
Fisherr EHD and EHT NPS 8 through 14
Sliding-Stem Control Valves
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . .
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 Fisherr EHD and EHT
sliding-stem globe-style control valves. Refer to
separate manuals for instructions covering the
actuator, positioner, and accessories.
www.Fisher.com
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EH Valves (NPS 8 through 14)
1
1
2
2
3
4
4
5
6
6
10
10
11
11
13
15
15
16
16
17
18
18
19
W2992-1/IL
21
Figure 1. Fisherr EH Series Control Valve
21
23
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
Emerson Process Management sales office before
proceeding.
with 667 Actuator