Installing Pump; Suction Piping; Discharge Piping - Pioneer PT Series Operation & Maintenance Manual

INSTALLING PUMP

Ensure that all foreign material has been removed from the pump before mounting. Be sure to
remove all shipping protection prior to operation.
NOTE: Many of the bare pumps are shipped with protective guards and coatings.

SUCTION PIPING

For best performance the suction piping should be at least as large as the pump flange, never smaller.
Use an eccentric reducer at the suction flange with the straight side up. The use of flow-retarding
fittings is to be avoided and if necessary should never be placed closer to the pump suction than four
(4) times the pipe diameter. The pump should be at the highest point of the piping. Slope the piping
up to the pump to prevent air pockets and avoid changing pipe
size with the exception of the eccentric reducer mentioned above. All suction piping and fittings are
to be checked for any foreign material (rocks, bolts, wire, etc.) and also any sharp burrs that could
disrupt the flow.
CAUTION!!!
The suction and discharge pipe/hose material should be compatible with the liquid being pumped.
CAUTION!!!
If hose is used on the suction line it should be of the reinforced type to prevent collapse under
suction lift.
DANGER!!!
If a manual shut-off valve is installed in the discharge line, it must not be left closed during
operation, a closed manual shut off valve will cause overheating and possible explosive rupture of
the pump casing. Personnel could be severely injured!

DISCHARGE PIPING

Use a concentric taper on the discharge side to increase discharge pipe diameters. All valving and
additional fittings should be the same size as the discharge main-line. The discharge size should be
adequate to maintain reasonable velocities and reduce friction losses.
SUCTION & DISCHARGE PIPE FLANGES
All piping is to be supported, braced and lined up square before connection to the pump flanges. A
flexible fitting is recommended on both suction and discharge, to eliminate misalignment loads or
stresses being transmitted to the pump.
NOTE: Flexible pipe couplings must be restrained so as not to transmit any strain to the pump
flanges when expanding or contracting under pressure. Unrestrained expansion fittings can transmit
enormous forces to the pump flanges.
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