Gorman-Rupp Pumps 610M20B-B 699260 and up - Manual (Page 13)

OM−01912 60 SERIES
OPERATION PAGE C − 1
OPERATION − SECTION C
Review all SAFETY information in Section A.
Follow the instructions on all tags, labels and
decals attached to the pump.
This pump is designed to handle clean
liquids containing specified entrained
solids. Do not attempt to pump volatile,
corrosive, or flammable liquids which
may damage the pump or endanger per-
sonnel as a result of pump failure.
Pump speed and operating condition
points must be within the continuous per-
formance range shown on the curve (see
Section E, Page 1).
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.
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.
Hand Primers
Hand-operated primers are usually mounted on
the pump and, when operated, draw air out of the
suction line and pump casing. To prime a pump
with a hand vacuum pump, open the cock on the
pump priming line. Operate the hand pump until
liquid flows out of the check valve on the bottom of
the primer pump. Once the pump is primed, close
the valve located between the primer and the
pump so that the prime will not be lost.
DRAIN COCK
HANDLE
Figure 1. Hand Primer Assembly