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Fisher
™
Large ET/EWT and ED/EWD Valves
NPS 12 through 30
Contents
Introduction 1.................................
Scope of Manual 1.............................
Educational Services 2.........................
Description 2.................................
Specifications 2...............................
Installation 4..................................
Maintenance 5.................................
Packing Lubrication 6..........................
Packing Maintenance 7.........................
Replacing Packing 7........................
Trim Maintenance 9...........................
Disassembly 9.............................
Valve Plug Maintenance 12..................
Seat Ring Maintenance 15...................
Bore Seal Retrofit 18.......................
Assembly 19..............................
Parts Ordering 20...............................
Parts Kits 20...................................
Parts List 22...................................
Figure 1. Fisher NPS 12 Valve with Piston Actuator
and FIELDVUE™ DVC6200 Digital Valve Controller
X0237-1
Introduction
Scope of Manual
This instruction manual includes installation, maintenance, and parts information for NPS 12 through 30 Fisher
ET/EWT and ED/EWD valves, through CL600 ratings.
Refer to separate manuals for instructions covering the actuator and accessories.
Do not install, operate, or maintain ET/EWT or ED/EWD valves 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
D103553X012
Large ET and ED Valves
July 2017
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