Fisher® EWD, EWS, and EWT Valves through NPS 12x80 pages

Instruction Manual

EW Valve

D100399X012

July 2014

Fisherr 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-SEALt 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 Process Management sales office before
proceeding.

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