Emerson Fisher EWD, Instruction Manual

Page: 1 / 60

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Fisher
™
EWD, EWS, and EWT Valves
through NPS 12x8
Contents
Introduction 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of Manual 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Educational Services 4 . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inverted Globe Valve Applications
(Actuator below valve) 6 . . . . . . . . . . . . . . . . . . . . .
Maintenance 7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Packing Lubrication 8 . . . . . . . . . . . . . . . . . . . . . . . . . .
Packing Maintenance 10 . . . . . . . . . . . . . . . . . . . . . . . .
Replacing Packing 11 . . . . . . . . . . . . . . . . . . . . . . .
Trim Maintenance 14 . . . . . . . . . . . . . . . . . . . . . . . . . .
Trim Removal 15 . . . . . . . . . . . . . . . . . . . . . . . . . .
Lapping Metal Seats 16 . . . . . . . . . . . . . . . . . . . . .
Valve Plug Maintenance 17 . . . . . . . . . . . . . . . . . .
Trim Replacement 19 . . . . . . . . . . . . . . . . . . . . . .
Retrofit: Installing C‐seal Trim 20 . . . . . . . . . . . . . . . .
Replacement of Installed C‐seal Trim 24 . . . . . . . . . . .
Trim Removal (C‐seal Constructions) 24 . . . . . . .
Lapping Metal Seats (C‐seal Constructions) 25 . .
Remachining Metal Seats
(C‐seal Constructions) 25 . . . . . . . . . . . . . . . . .
Trim Replacement (C‐seal Constructions) 26 . . .
ENVIRO‐SEAL
t
Bellows Seal Bonnet 27 . . . . . . . . . . .
Parts Ordering 32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Kits 33
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List 36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1. Fisher NPS 12x6 EW Series Valve With
667 Actuator
W2777‐2*
Introduction
Scope of Manual
This instruction manual includes installation, maintenance, and parts information for Fisher NPS 4x2 through 12x8
EWD, EWS, and EWT valves (figure 1). Refer to separate manuals for instructions covering the actuator and
accessories.
Do not install, operate, or maintain an EW 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
D100399X012
EW Valve
July 2017