0 SERIES OM-06273
PAGE B - 3INSTALLATION
tion‐free base or platform. The pump should be
placed directly over a beam or as near to a main
support as possible.
Any damage to the pump resulting from improper
mounting and installation is not covered by the
Gorman‐Rupp warranty.
When filling the tank, locate the pump in an acces
sible place as close as practical to the fuel being
pumped. Vertical distance (static suction lift)
should be kept to a minimum. High static lift and a
long suction line results in a longer period of time
required to prime the pump. They also tend to limit
the maximum amount of liquid pumped.
Hydraulic Motor Connections
Remove the plug in the top of the motor and install
a vent line back to the hydraulic tank in the plug
opening. Connect the hydraulic lines to the ap
propriate openings in the motor as indicated by the
decals on the motor. Pressurize the hydraulic sys
tem and check for leaks before putting the pump
into service.
SUCTION AND DISCHARGE PIPING
Materials
Either pipe or hose maybe used for suction and
discharge lines; however, the materials must be
compatible with the liquid being pumped. If hose is
used in suction lines, it must be the rigid‐wall, rein
forced type to prevent collapse under suction. Us
ing piping couplings in suction lines is not recom
mended.
Line Configuration
Keep suction and discharge lines as straight as
possible to minimize friction losses. Make mini
mum use of elbows and fittings, which substan
tially increase friction loss. If elbows are necessary,
use the long‐radius type to minimize friction loss.
Connections to Pump
Before tightening a connecting flange, align it ex
actly with the pump port. Never pull a pipe line into
place by tightening the flange bolts and/or cou
plings.
Lines near the pump must be independently sup
ported to avoid strain on the pump which could
cause excessive vibration, decreased bearing life,
and increased shaft and seal wear. If hose‐type
lines are used, they should have adequate support
to secure them when filled with liquid and under
pressure.
Gauges
This pump has a 1/4‐inch NPT tap on the suction
side for installation of a vacuum suction gauge.
If a discharge pressure gauge is desired, drill and
tap the discharge line in a visible location approxi
mately three pipe diameters away from any fittings
or points of turbulent flow. Installation closer to the
pump may result in erratic readings.
SUCTION LINES
To avoid air pockets which could affect pump prim
ing, the suction line must be as short and direct as
possible. When operation involves a suction lift, the
line must always slope upward to the pump from
the source of the liquid being pumped; if the line
slopes down to the pump at any point along the
suction run, air pockets will be created.
Fittings
Suction lines should be the same size as the pump
inlet. If reducers are used in suction lines, they
should be the eccentric type, and should be in
stalled with the flat part of the reducers uppermost
to avoid creating air pockets. Valves are not nor
mally used in suction lines, but if a valve is used,
install it with the stem horizontal to avoid air pock
ets.
Strainers
A suction strainer was not furnished with this pump
since it is not designed to handle liquids containing
solids. However, to protect the pump from acciden
tal damage a commercially available 80 mesh
screen should be installed in the suction line. Make
certain that the total open area of the screen is at
least three or four times the cross section of the
