Instruction Manual Form 2376 March 1998
Designs EWD, EWS, & EWT
Introduction
................................. 1 Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation
.................................. 3
Maintenance
................................ 4 Packing Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Packing Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 5 Replacing Packing . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Trim Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Trim Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Lapping Metal Seats . . . . . . . . . . . . . . . . . . . . . . 11 Valve Plug Maintenance . . . . . . . . . . . . . . . . . . . 11 Trim Replacement . . . . . . . . . . . . . . . . . . . . . . . . 12 Retrofit: Installing C-seal(1) Trim . . . . . . . . . . . . . 13 Replacement of Installed C-seal Trim . . . . . . . . . 15 Trim Removal (C-seal Constructions) . . . . . . . . 15 Lapping Metal Seats (C-seal Constructions) . . 17 Remachining Metal Seats (C-seal Constructions) . . . . . . . . . . . . . . . . . . 17 Trim Replacement (C-seal Constructions) . . . . 17 ENVIRO-SEAL R Bellows Seal Bonnet . . . . . . . . 18 Replacing a Plain or Extension Bonnet with an ENVIRO-SEAL Bellows Seal Bonnet (Stem/Bellows Assembly) . . . . . . . . . . . . . . . 18 Replacement of an Installed ENVIRO-SEAL Bellows Seal Bonnet (Stem/Bellows Assembly) . . . . . . . . . . . . . . . 19 Purging the ENVIRO-SEAL Bellows Seal Bonnet . . . . . . . . . . . . . . . . . . . . 21
W2777-2*/IL
Figure 1. 12 x 6-Inch EW Series Valve With Type 667 Actuator
Parts Ordering
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Parts List
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
This instruction manual includes installation, maintenance, and parts information for 4 x 2 through 12 x 8-inch Design EWD, EWS, and EWT valves (figure 1).
D100399X012
Parts Kits