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Visually inspect the physical condition of the relief valve at
least once a year to check if there are leaks or damage to
the relief valve. If the relief valve or pilots show any visible
damage, corrosion, evidence of tampering or if water,
dirt or debris is found in the discharge side of the relief
valve, the valve must be cleaned, repaired and retested
or replaced immediately. Observe the rain cap (key 51)
periodically. If it is no longer on valve outlet flange, inspect
the unit.
It is recommended to switch the lever/handle assembly
yearly to activate alternate pilot. It is also recommended
to replace both pilots valves every 10 years. Since the
elastomer seals in a relief valve are subject to normal
deterioration, Fisher™ recommends that a relief valve
not be used for longer than 15 years without repair,
retest or replacement. Earlier repair or replacement
may be required due to severe service conditions or
code requirements. If leakage is observed from the
relief valve during inspection, the main seals should be
replaced and the relief valve retested or the relief valve
replaced immediately.
Retesting may include:
a.) Testing both pilot valves for start-to-discharge;
b.) Testing the valve for internal , or by-pass, leakage.
The test for leakage can be done by spraying the outlet
with soap solution and observe for bubbles. If bubbles are
present then the valve will be to be repaired or replaced
as necessary. A more accurate test involves the use of
a gas leak detector device. Use this device by placing it
around the outlet of the valve. If the device detects a gas
leak, replace the main seals or entire valve as necessary.
Main seal replacement within the main body is only
required if the valve does not pass a leakage test. If the
main seals maintane a bubble-tight seal then they do
not require replacement. At 15 years from the valve's
date of manufacturing, or before, the valve would have
to be tested for main valve seat leakage. If there is no
leakage the valve can remain in service without having to
depressurize the tank, or replace the main valve body.
During testing or leak checking of a given
pilot valve, confirm the lever/handle is
completely pointed toward the inactive
pilot. Do not have it pointed toward the
active pilot or in between the two pilots.
Note
Type 63EGLP/63EGLP-16
Due to the care Emerson takes in meeting all
manufacturing requirements (heat treating, dimensional
tolerances, etc.), use only replacement parts
manufactured or furnished by Emerson.
Lubricate all O-rings, gaskets and seals with a good
grade of general-purpose grease and install gently rather
than force into position. Update nameplates to accurately
indicate any field changes in equipment, materials,
service conditions or pressure settings.
▲
To avoid personal injury and
equipment damage, isolate the valve
from all pressure. Cautiously release
pressure from the valve before
attempting disassembly.
Type 63EGLP/63EGLP-16 Dual-Pilot
Valve Assembly
To Change Out A Pilot
This section only applies to
Type 63EGLP/63EGLP-16 assemblies
received with two pilots. If your assembly
only has one pilot, refer to section To
Install an Additional Pilot. Replacing one of
the two pilots requires the following tools
and Fisher™ Key Numbers:
• Wrench Sizes (recommend open-ended or
adjustable): 11/16 in.
• Required Fisher Key Numbers
(QTY): Matching Type 6358EBLP or
6358EBHLP Pilot (x1)
• Option Key Numbers (QTY): 49 (x2)
To easily identify the active pilot, check the
direction of handle assembly. The handle
assembly is always pointing away from the
active pilot. See Figure 3.
WARNING
Note
9
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