OM−05850
G-R
MAINTENANCE & REPAIR
PAGE E − 4
AIR RELEASE VALVE DISASSEMBLY
AND REASSEMBLY
Review all SAFETY information in Section A.
Under normal conditions, Gorman-Rupp Automat-
ic Air Release Valves require no maintenance due
to their rugged design. However, if it becomes nec-
essary to replace parts, follow these instructions,
which are keyed to Figure E−2 and the accompa-
nying parts list.
This manual will alert personnel to known proce-
dures which require special attention, to those
which could damage equipment, and to those
which could be dangerous to personnel. However,
this manual cannot possibly anticipate and provide
detailed precautions for every situation that might
occur during maintenance of the unit. Therefore, it
is the responsibility of the owner/maintenance per-
sonnel to ensure that
only
safe, established main-
tenance procedures are used, and that any proce-
dures not addressed in this manual are performed
only
after establishing that neither personal safety
nor the integrity of the pump or Air Release Valve
are compromised by such practices.
Before attempting to service the Air Release Valve,
disconnect or lock out the power supply to the
pump or isolate the Air Release Valve to ensure that
it will remain inoperative. Close all valves in the
pump suction and discharge lines.
Before attempting to service the Air Re-
lease Valve:
1. Familiarize yourself with this man-
ual.
2. Disconnect or lock out the power
source to the pump or isolate the
Air Release Valve to ensure that it
will remain inoperative.
3. Allow the pump and liquid to com-
pletely cool if overheated.
4. Check the temperature before
opening any covers, plates, or
plugs.
If a manual shut-off valve is installed in
the bypass line to facilitate service of
the Air Release Valve, be sure to open
the shut-off valve after servicing the Air
Release Valve. A closed manual shut-off
valve may cause a pump which has lost
prime to continue to operate without
reaching prime, causing dangerous
overheating and possible explosive
rupture of the pump casing. Personnel
could be severely injured
.
Allow an over-heated pump to com-
pletely cool before servicing
.
Do not
re-
move plates, covers, gauges, or fittings
from an over-heated pump. Liquid with-
in the pump can reach boiling tempera-
tures, and vapor pressure within the
pump can cause parts being disen-
gaged to be ejected with great force. Af-
ter the pump cools, drain the liquid from
the pump by removing the casing drain
plug. Use caution when removing the
plug to prevent injury to personnel from
hot liquid.
If the application involves volatile, cor-
rosive or hazardous liquids, wear pro-
tective safety equipment, such as
goggles, rubber gloves and apron when
servicing the pump or Automatic Air Re-
lease Valve.
Air Release Valve Disassembly
After all piping system valves have been closed,
disengage the Air Release Valve piping and move
the Air Release Valve to a suitable work area for ser-
vice.
