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Fisher
r
Large ET and ED Valves
NPS 12 through 16 and NPS 30
Contents
Introduction
1
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Scope of Manual
1
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Educational Services
2
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Description
3
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Specifications
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation
4
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Maintenance
5
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Packing Lubrication
7
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Packing Maintenance
7
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Replacing Packing
7
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Trim Maintenance
12
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Trim Removal
12
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Lapping Seating Surfaces
13
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Valve Plug Maintenance
13
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Trim Replacement
14
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Retrofit: Installing Bore Seal Trim
19
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Replacement of Installed Bore Seal Trim
21
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Trim Removal (Bore Seal Constructions)
21
. . . .
Lapping Metal Seats
(Bore Seal Constructions)
22
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Remachining Metal Seats
(Bore Seal Constructions)
22
. . . . . . . . . . . . . .
Trim Replacement
(Bore Seal Constructions)
23
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Parts Ordering
24
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Parts List
25
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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 and maintenance information for NPS 12 through 16 and NPS 30 CL150
through 600 Fisher ET and ED valves.
Refer to separate manuals for instructions covering the actuator and accessories.
Do not install, operate, or maintain an ET or ED 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.
Instruction Manual
D103553X012
Large ET and ED Valves
July 2014
