Fisher EHD series, Инструкция по эксплуатации, Страница: 1 / 32

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Fisher
™
EHD and EHT NPS 8 through 14
Sliding‐Stem Control Valves
Contents
Introduction 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of Manual 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Educational Services 3 . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Principle of Operation 5 . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Packing Lubrication 6 . . . . . . . . . . . . . . . . . . . . . . . . . .
Packing Maintenance 7 . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing Packing 7 . . . . . . . . . . . . . . . . . . . . . . . .
Trim Removal 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EHD, EHT Valve Plug Maintenance 12 . . . . . . . . . . . . .
Lapping Seats 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trim Replacement 14 . . . . . . . . . . . . . . . . . . . . . . . . . .
Retrofit: Installing Bore Seal Trim 17 . . . . . . . . . . . . . .
Replacement of Installed Bore Seal Trim 19 . . . . . . . .
Trim Removal (Bore Seal Constructions) 19 . . . .
Lapping Metal Seats
(Bore Seal Constructions) 20 . . . . . . . . . . . . . .
Remachining Metal Seats
(Bore Seal Constructions) 20 . . . . . . . . . . . . . .
Trim Replacement
(Bore Seal Constructions) 20 . . . . . . . . . . . . . .
Actuator Mounting 22 . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Ordering 22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Kits 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List 25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bonnet Assembly 25 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Assembly 26 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1. Fisher EH Series Control Valve
with 667 Actuator
W2992‐1
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 Emerson sales office or Local Business Partner before
proceeding.
Instruction Manual
D100392X012
EH Valves NPS 8 through 14
June 2017