Gorman-Rupp Pumps 54J20-B 1410811 and up - Manual (Page 17)

OM-01342 50 SERIES
OPERATION PAGE C - 1
OPERATION - SECTION C
Review all SAFETY information in Section A.
Follow the instructions on all tags, labels and de­
cals attached to the pump.
This pump is designed to handle clear
water. Do not attempt to pump volatile,
corrosive, or flammable materials which
may damage the pump or endanger per­
sonnel as a result of pump failure.
PRIMING
Install the pump and piping as described in IN­
STALLATION. Make sure that the piping connec­
tions are tight, and that the pump is securely
mounted. Check that the pump is properly lubri­
cated (see LUBRICATION in MAINTENANCE
AND REPAIR).
This is not a self‐priming pump, so an external
priming device must be used if the pump is in­
stalled on a suction lift. A foot valve may be in­
stalled at the end of the suction pipe to maintain the
prime; however, this may adversely affect pump
performance due to friction loss. Many standard
centrifugal models are equipped with a hand‐oper­
ated vacuum pump, exhaust primer, or ejector for
this purpose. If a priming device was not furnished
with the pump, it may be ordered from the factory
as an option.
Before attempting to operate the priming device,
close the discharge throttling valve. (Installation of
a spring‐loaded check valve is also recommended
to facilitate priming.) Once the pump is fully
primed, close the valve between the priming de­
vice and pump to preserve the prime. Start the
pump and open the discharge valve slowly to fill
the discharge line.
When installed in a flooded suction application,
simply open the system valves and permit the in­
coming liquid to evacuate the air. After the pump
and piping system have completely filled, evacu­
ate any remaining air pockets in the pump or suc­
tion line.
Never operate this pump unless there is
liquid in the pump casing. The pump will
not prime when dry. Extended operation of
a dry pump will destroy the seal assembly.
STARTING
Consult the operations manual furnished with the
power source.
Starting procedures will vary slightly depending on
the pump application, type of priming device, and
type of drive.
OPERATION
Lines With a Bypass
Either a Gorman‐Rupp automatic air release valve
or a hand operated shutoff valve may be installed in
a bypass line.
Close the discharge throttling valve (if so
equipped) so that the pump will not have to prime
against the weight of the liquid in the discharge
line. Air from the suction line will be discharged
through the bypass line back to the wet well during
the priming cycle. When the pump is fully primed
and liquid is flowing steadily from the bypass line,
open the discharge throttling valve. Liquid will then
continue to circulate through the bypass line while
the pump is in operation.
Lines Without a Bypass
Open all valves in the discharge line and start the
engine. Priming is indicated by a positive reading
on the discharge pressure gauge or by a quieter
operation. The pump may not prime immediately