GHA SERIES
OM--04621
PAGE C--1
OPERATION
OPERATION --- SECTION C
Review all SAFETY information in Section A.
Follow the instructions on all tags, labels and
decals attached to the pump.
PUMP OPERATION
Never use a pressure relief valve to reg-
ulate liquid flow. Pressure relief valves
are designed as safety devices only. At-
tempting to regulate flow with a pres-
sure relief valve may cause the pump or
piping to explode, causing severe per-
sonal injury or death.
PRE-OPERATION
Make certain that all instructions in
INSTALLA-
TION,
Section B have been carried out.
The standard version of the pump is de-
signed to handle a wide range of light, me-
dium, and heavy viscosity liquids, depend-
ing on design and components. Do not op-
erate the pump with higher liquid tempera-
tures than what it was designed; otherwise,
pump components and operation may be
affected. For temperature range consult
The Gorman-Rupp Company.
Before Starting the Pump
Never operate the pump against a
closed suction or discharge valve. The
pump will overheat, and may rupture or
explode, causing personal injury or
death.
Open all valves in the suction and discharge lines,
and close all drain valves.
If your pump is equipped with a packing seal, loos-
en the gland nuts before starting until the packing
gland may be moved slightly. If leakage seems ex-
cessive after starting, wait until the pump has run
long enough to reach its normal operating temper-
ature to adjust the gland nuts. Packing pumps
must leak slightly
to cool and lubricate the shaft
and to allow the shaft to turn freely.
Consult the drive manufacturer’s operating manu-
al before attempting to start the drive.
In a suction lift application, fill the pump housing
with liquid to seal clearances and to lubricate the
pump.
Checking Pump Rotation
Correct rotation of your pump is shown on the
pump serial plate or direction arrow plate.
In applications with a single direction of
flow and a single pump-mounted pressure
relief valve, make certain that the drive unit
turns the pump in the correct direction of
rotation. Otherwise, the pump-mounted
pressure relief valve will not function.
Follow the drive unit manufacturer’s instructions,
jog the pump motor
briefly
, and check rotation.
Gorman-Rupp rotary gear pumps are bi-
directional; however, the pumps are
manufactured to rotate in one specific di-
rection. If rotation is to be changed, the
pressure relief valve must be re-installed
with the cap pointing toward the suction
port. Additionally, if the discharge pressure
is greater than the shaft seal rating (consult
your Gorman-Rupp distributor), the pres-
