Gorman-Rupp Pumps 04E1-GA 1171927 and up - Manual (Page 16)

OM−03745 0 SERIES
OPERATION PAGE C − 2
could be damaged and performance adversely af-
fected by incorrect rotation. If pump performance
is not within the specified limits (see the curve on
Page E−1), check the direction of rotation before
further troubleshooting.
Drive
This pump is designed for operation with a power
take-off unit coupled to the drive shaft on the gear-
box. The gearbox assembly has a ratio of 2.19:1,
and is designed for operation at 2250 RPM maxi-
mum input speed. Do not operate at a higher input
speed.
The gearbox provided on this pump is
designed for operation at 2250 RPM
maximum input speed. If operated at a
higher RPM, pump components may be
destroyed.
OPERATION
Partially open the discharge throttling valve so that
the discharge line fills slowly to prevent damage to
piping, gaskets, and other devices in the line which
could be affected by shock resulting from rapid fill-
ing of the line. When the discharge line is com-
pletely filled, adjust the discharge throttling valve to
the desired flow rate.
Leakage
No leakage should be visible at pump mating sur-
faces, or at pump connections or fittings. Keep all
line connections and fittings tight to maintain maxi-
mum pump efficiency.
Liquid Temperature And Overheating
The maximum liquid temperature for this pump is
160
_ F (71_C). Do not apply it at a higher operating
temperature.
Overheating can occur if operated with the valves
in the suction or discharge lines closed. Operating
against closed valves could bring the liquid to a
boil, build pressure, and cause the pump to rup-
ture or explode. If overheating occurs, stop the
pump and allow it to cool before servicing it. Refill
the pump casing with cool liquid.
Allow an overheated pump to cool be-
fore servicing. Do not remove plates,
covers, gauges, pipe plugs, or fittings
from an overheated pump. Liquid within
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.
Strainer Check
If a suction strainer has been shipped with the
pump or installed by the user, check the strainer
regularly, and clean it as necessary. The strainer
should also be checked if pump flow rate begins to
drop. If a vacuum suction gauge has been in-
stalled, monitor and record the readings regularly
to detect strainer blockage.
Never introduce air or steam pressure into the
pump casing or piping to remove a blockage. This
could result in personal injury or damage to the
equipment. If backflushing is absolutely neces-
sary, liquid pressure must be limited to 50% of the
maximum permissible operating pressure shown
on the pump performance curve (see Section E,
Page 1).
Pump Vacuum Check
Since this pump does not have a suction check
valve, the discharge line must be fitted with a check
valve if a pump vacuum reading is to be taken.
With the pump inoperative, install a vacuum gauge
in the system, using pipe dope on the threads.