Instruction Manual Form 5081 January 2001
Design ET & EAT Class 125-600
Design ET and EAT easy-eR Valves Class 125 through 600 Contents Introduction
............................... Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation
1 1 2 2
................................. 3
Maintenance
............................... 3 Packing Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Packing Maintenance . . . . . . . . . . . . . . . . . . . . . . . . 4 Replacing Packing . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Trim Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Lapping Metal Seats . . . . . . . . . . . . . . . . . . . . . . . . 9 Valve Plug Maintenance . . . . . . . . . . . . . . . . . . . . 10 Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 ENVIRO-SEAL Bellows Seal Bonnet . . . . . . . . . 12 Replacing a Plain or Extension Bonnet with an ENVIRO-SEAL Bellows Seal Bonnet (Stem/Bellows Assembly) . . . . . . . . . . . . . . . . 12 Replacement of an Installed ENVIRO-SEAL Bellows Seal Bonnet (Stem/Bellows Assembly) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Purging the ENVIRO-SEAL Bellows Seal Bonnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Parts Kits
15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
W1916-3 / IL
Figure 1. Design ET Control Valve with Type 667 Actuator
17
Introduction Scope of Manual This instruction manual includes installation, maintenance, and parts information for 1- through 8-inch Design ET valves, and 1- through 6-inch Design
EAT valves, through Class 600 ratings. Refer to separate manuals for instructions covering the actuator and accessories. Only persons qualified through training or experience should install, operate, and maintain a Design ET valve. If you have any questions about these instructions, contact your Fisher sales office before proceeding. D100398X012
Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . .