Jordan Valve Mark EZ Series Globe Style Control Valve - Manual (Page 2)

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The Mark EZ Series valve components are subject to
normal wear and must be inspected and replaced on a
regular scheduled basis. Severe service conditions may
require shorter inspection and maintenance intervals.
This section includes instructions for packing lubrication,
packing maintenance, and trim maintenance.
Prior to performing any maintenance operations:
1. Disconnect any operating lines providing air
pressure, electric power, or a control signal to
the actuator. Ensure the actuator cannot
suddenly open or close the valve.
2. Use bypass valves or completely shut off the
process to isolate the valve from process pres-
sure. Relieve process pressure from both sides
of the valve. Drain the process media from both
sides of the valve.
3. Vent the pneumatic actuator loading pressure
and relieve any actuator spring pre-
compression.
4. Use lock-out procedures to be sure that the
above measures stay in effect.
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 hard-
ware or packing rings, or when loosening the pack-
ing box pipe plug.
Should a gasket seal be disturbed by removing or
shifting gasketed parts, install a new gasket upon
reassembly.
Packing Lubrication
An optional lubricator or lubricator/isolating valve
(figure 1) is available for PTFE/composition or other
packings that require lubrication. It will be installed
in an optional tapped hole in the bonnet. Use a good
quality silicon-based lubricant. Packing used in oxy-
gen service or in processes with temperatures over
260°C (500°F) do not require lubrication. To operate
the lubricator, turn the cap screw clockwise to force
the lubricant into the packing box. The lubricator/iso-
lating valve must first be opened and then closed after
lubrication is completed.
Figure 1: Optional Packing Lubricator and
Lubricator/ Isolating Valve
Figure 2: PTFE V-Ring Packing Arrangements for Plain and Extension Bonnets
Lubricator
Lubricator/ Isolating Valve