Packing Lubrication; Packing Maintenance - Fisher EWS Series Instruction Manual

Instruction Manual
Form 2376
March 2007
process pressure on 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.
CAUTION
Follow instructions carefully to avoid
damaging the product surfaces, which
could result in damage to the product.
Whenever a gasket seal is disturbed
by removing or shifting gasketed
parts, install a new gasket upon
reassembly. This is necessary to
ensure a good gasket seal because the
used gasket may not seal properly.

Packing Lubrication

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
Note
Note
LUBRICATOR
10A9421-A
LUBRICATOR/ISOLATING VALVE
AJ5428-D
A0832-2/IL
Figure 3. Lubricator and Lubricator/Isolating Valve (optional)
used in oxygen service or in
processes with temperatures over
260_C (500_F).
If a lubricator or lubricator/isolating valve (figure 3) is
provided for PTFE/composition or other packings
that require lubrication, it will be installed in place of
the pipe plug (key 14, figure 21). Use a good quality
silicon-base 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 completed.

Packing Maintenance

For valves with ENVIRO-SEAL
live-loaded packing, see the Fisher
instruction manual, ENVIRO-SEAL
Packing System for Sliding-Stem
Valves, Form 5306, for packing
instructions. For valves with
HIGH-SEAL live-loaded packing, see
the Fisher instruction manual,
HIGH-SEAL Live-Loaded Packing
System, Form 5263, for packing
instructions.
Key numbers refer to figure 4 for PTFE V-ring
packing and to figure 5 for PTFE/composition
packing, unless otherwise indicated.
For spring-loaded single PTFE V-ring packing, the
spring (key 8, figure 4) maintains a sealing force on
EW Valve
Note
7