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D100399X012
Design EWD, EWS, and EWT Valves
through NPS 12x8
Contents
Introduction
1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of Manual
1
. . . . . . . . . . . . . . . . . . . . . . . . .
Description
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inverted Globe Valve Applications
(Actuator below valve)
6
. . . . . . . . . . . . . . . . . .
Maintenance
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Packing Lubrication
7
. . . . . . . . . . . . . . . . . . . . . . .
Packing Maintenance
7
. . . . . . . . . . . . . . . . . . . . .
Replacing Packing
9
. . . . . . . . . . . . . . . . . . . . . . .
Trim Maintenance
11
. . . . . . . . . . . . . . . . . . . . . . .
Trim Removal
12
. . . . . . . . . . . . . . . . . . . . . . . . . .
Lapping Metal Seats
13
. . . . . . . . . . . . . . . . . . . .
Valve Plug Maintenance
14
. . . . . . . . . . . . . . . . .
Trim Replacement
15
. . . . . . . . . . . . . . . . . . . . . .
Retrofit: Installing C-seal
t
Trim
16
. . . . . . . . . . .
Replacement of Installed C-seal Trim
18
. . . . . .
Trim Removal
(C-seal Constructions)
18
. . . . . . . . . . . . . . . .
Lapping Metal Seats
(C-seal Constructions)
19
. . . . . . . . . . . . . . . .
Remachining Metal Seats
(C-seal Constructions)
20
. . . . . . . . . . . . . . . .
Trim Replacement
(C-seal Constructions)
20
. . . . . . . . . . . . . . . .
ENVIRO-SEAL
r
Bellows Seal Bonnet
21
. . . . . .
Replacing a Plain or Extension Bonnet with an
ENVIRO-SEAL Bellows Seal Bonnet
(Stem/Bellows Assembly)
21
. . . . . . . . . . . . .
Replacement of an Installed ENVIRO-SEAL
Bellows Seal Bonnet
(Stem/Bellows Assembly)
22
. . . . . . . . . . . . .
Purging the ENVIRO-SEAL
Bellows Seal Bonnet
25
. . . . . . . . . . . . . . . . .
Parts Ordering
25
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Kits
26
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List
29
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1. NPS 12x6 EW Series Valve With
Type 667 Actuator
W2777-2*/IL
Introduction
Scope of Manual
This instruction manual includes installation,
maintenance, and parts information for NPS 4x2
through 12x8 Design EWD, EWS, and EWT valves
(figure 1). Refer to separate manuals for instructions
covering the actuator and accessories.
Do not install, operate, or maintain a Design EW
valve without first
D
being fully trained and qualified
in valve, actuator, and accessory installation,
operation, and maintenance, and
D
carefully reading
and understanding the contents of this manual. If
you have any questions about these instructions,
contact your Emerson Process Management
t
sales
office before proceeding.
Instruction Manual
Form 2376
March 2007
EW Valve
