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Type 63EGLP
PORT a (ExHauST)—THE Main VaLVE LOaDinG PRESSuRE iS DiSCHaRGED TO THE Main VaLVE OuTLET OR TO aTMOSPHERE PRESSuRE.
PORT C (LOaDinG)—a LOaDinG PRESSuRE SiGnaL iS SEnT FROM THiS PORT TO THE Main VaLVE DiaPHRaGM CaSinG.
PORT D (COnTROL)—THE Main VaLVE inLET PRESSuRE iS SEnSED aT THiS PORT.
additionally, physical damage to the
relief valve could break the pilot off the
main valve, causing personal injury and
property damage due to escaping gas.
To avoid such injury or damage, install
the unit in a safe location.
1. Call a qualified personnel and use proper
equipment when installing, operating and
maintaining relief valves. Before installing, inspect
the main valve, pilot and tubing for any shipment
damage or foreign material that may have collected
during crating and shipment. Make certain the body
interior is clean and the pipelines are free of foreign
material. To install a flanged body, use suitable line
gaskets and good bolting practices. Main body
gasket and studs and nuts are not included.
To order, see parts list.
2. Use the lifting sling (key 50) wrapped around
outlet flange (as shipped) to lift the Type 63EGLP
when installing the unit. After installing the valve
on the tank, install rain cap (key 51) on outlet
flange. Ensure that the valve is in the vertical-
up orientation with flow through it matching the
direction of the arrow on the main valve body. An
upstream control line is not required because of
the integral pilot supply tubing.
WaRninG
!
Type 63EGLP relief valves vent gas from
the main valve outlet and from the pilot
exhaust. In hazardous or flammable
6
PORT C
(LOaDinG)
PORT D
(COnTROL)
Figure 5. Pilot Port Functions (bottom view)
PORT a
(ExHauST)
gas service, personal injury, death or
property damage may occur due to fire
or explosion of accumulated vented gas.
To prevent such injury or damage, vent the
gas to a safe location. Design and install
exhaust piping to guard against excessive
flow restriction. Protect the pilot vent and
exhaust piping from condensation or
debris that can clog it.
3. If system operation is necessary during
maintenance or inspection, one pilot can be
isolated while the other pilot actively loads the
main valve to continuously protect the system. If
service to the main valve is required, remove the
upstream pressure.
4. Install a relief valve so that the pilot will exhaust
properly and into a safe place. The pilot spring case
vent must be kept open to atmospheric pressure.
Protect this vent from icing, moisture or other
blockage as required. If the vent assembly (key 16)
remains in the pilot exhaust port (connection A,
Figure 5), it must be pointed down if possible or
otherwise protected.
5. If the exhaust is to be piped to the main valve outlet
or remotely vented, remove the vent assembly
and install obstruction-free tubing or piping with a
minimum number of bends into the 1/4 NPT pilot
exhaust connection. Provide protection on a remote
vent by installing a screened vent cap into the
remote end of the vent pipe.
6. If using pipe, apply a good grade of pipe
compound to the male pipe threads before making
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