Instruction Manual

Instruction Manual

D100390X012

ED Valve

October 2014

D Use bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process pressure

from both sides of the valve. Drain the process media from both sides of the valve.

D Vent the pneumatic actuator loading pressure and relieve any actuator spring precompression.

D Use lock-out procedures to be sure that the above measures stay in effect while you work on the equipment.

D The valve packing box may contain process fluids that are pressurized, even when the valve has been removed from the

pipeline. Process fluids may spray out under pressure when removing the packing hardware or packing rings, or when

loosening the packing box pipe plug.

D Check with your process or safety engineer for any additional measures that must be taken to protect against process

media.

Note

Whenever a gasket seal is disturbed by removing or shifting gasketed parts, install a new gasket during reassembly. This ensures a

good gasket seal because the used gasket may not seal properly.

Packing Lubrication

Note

ENVIRO-SEAL or HIGH-SEAL packing does not require lubrication.

WARNING

To avoid personal injury or property damage resulting from fire or explosion, do not lubricate packing used in oxygen

service or in processes with temperatures over 260_C (500_F).

If a lubricator or lubricator/isolating valve (figure 2) is provided for PTFE/composition or other packings that require

lubrication, it will be installed in place of the pipe plug (key 14, figure 18). Use a good quality silicon-based lubricant.

Do not lubricate packing used in oxygen service or in processes with temperatures over 260_C(500_ F). To operate the

lubricator, simply turn the cap screw clockwise to force the lubricant into the packing box. The lubricator/isolating

valve operates the same way except open the isolating valve before turning the cap screw and then close the isolating

valve after lubrication is com pleted.

Packing Maintenance

Note

For valves with ENVIRO-SEAL packing, see the Fisher instruction manual, ENVIRO-SEAL Packing System for Sliding-Stem Valves,

D101642X012, for packing instructions.

For v alves with HIGH-SEAL packing, see the Fisher instruction manual, HIGH-SEAL Live-Loaded Packing System, D101453X012, for

packing instructions.

Key numbers refer to figure 3 for PTFE V-ring packing and to figure 4 for PTFE/composition packing, unless otherwise

indicated.