EHD~EHS~EHT 1-8 Inch Instruction Manual

Page 1

Instruction Manual D100394X012 October 2006

EH Valve (1 1/2x1 through 8x6)

Fisherr EHD, EHS, and EHT Valves NPS 1 1/2x1 through NPS 8x6 Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Packing Lubrication . . . . . . . . . . . . . . . . . . . . . . . 6 Packing Maintenance . . . . . . . . . . . . . . . . . . . . . . 6 Replacing Packing . . . . . . . . . . . . . . . . . . . . . . . 6 Trim Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Valve Plug Maintenance . . . . . . . . . . . . . . . . . . 11 Lapping Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Trim Replacement . . . . . . . . . . . . . . . . . . . . . . . 13 Retrofit: Installing C-seal Trim . . . . . . . . . . . . . 17 Replacement of Installed C-seal Trim . . . . . . . 19 Trim Removal (C-seal Constructions) . . . . . . 19 Lapping Metal Seats (C-seal Constructions) 21 Remachining Metal Seats (C-seal Constructions) . . . . . . . . . . . . . . . . 21 Trim Replacement (C-seal Constructions) . . 22 Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Parts Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 W3387 / IL

Introduction Scope of Manual

Figure 1. Fisher EH Valve with 657 Actuator

This instruction manual includes installation, maintenance, and parts information for the Fisher EHD, EHS, and EHT control valves in NPS 1 1/2 x 1 through NPS 8x6. Refer to separate manuals for instructions covering the actuator, positioner, ENVIRO-SEALt packing, HIGH-SEAL packing, and accessories.

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.

Do not install, operate, or maintain EHD, EHS, or EHT valves without being fully trained and qualified

Unless otherwise noted, all NACE references are to NACE MR0175-2002.

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