Instruction Manual Form 5109 June 1999
Design EH (8- through 14-Inch)
8- through 14-Inch Design EHD and EHT Sliding-Stem Control Valves Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation
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Principle of Operation
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Maintenance
.............................. 4 Packing Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Packing Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 5 Replacing Packing . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Trim Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Designs EHD, EHT Valve Plug Maintenance . . . . . 9 Lapping Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Trim Replacement . . . . . . . . . . . . . . . . . . . . . . . . . 10 Retrofit: Installing C-seal Trim . . . . . . . . . . . . . . . 12 Replacement of Installed C-seal Trim . . . . . . . . . 14 Trim Removal (C-seal Constructions) . . . . . . . . 14 Lapping Metal Seats (C-seal Constructions) . . 15 Remachining Metal Seats (C-seal Constructions) . . . . . . . . . . . . . . . . . . 15 Trim Replacement (C-seal Constructions) . . . . 15 Actuator Mounting . . . . . . . . . . . . . . . . . . . . . . . . . 16
Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . Parts Kits
17
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W2992-1/IL
Figure 1. EH Series Control Valve with Type 667 Actuator
Parts List
Introduction Scope of Manual This instruction manual includes installation, maintenance, and parts ordering information for 8- through
14-inch Design EHD and EHT sliding-stem globe-style control valves. Refer to separate manuals for instructions covering the actuator, positioner, and accessories. Only persons qualified through training or experience should install, operate, and maintain these valves. If you have any questions about these instructions, contact your Fisher Controls sales office or sales representative before proceeding. D100392X012
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Bonnet Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 20