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3.4.2 Discharge Piping
• Select piping to handle the maximum flow and pressure developed by
the pump.
• Sizing to induce 10 psi (0.70 bar) pressure drop or less per 100 feet
(30.5 m) is recommended.
3.4.3 Piping Connections
The standard QSV Series pump inlet and discharge connections are grooved
for Victaulic clamped-union couplings with gasket. The standard inlet and
discharge connection is 1-1/4-inch Victaulic. Victaulic couplings are available
worldwide. Contact the factory or your local industrial piping wholesaler.
3.4.4 Inlet Line Screen/Filter
This is a precision multi-stage pump with close tolerances to provide maxi-
mum efficiency. It is good practice to install a large area 30-mesh or finer
screen, or a cartridge filter in the pump inlet line to collect any foreign objects
or large particles. Size the screen or filter so as to induce a minimal pressure
drop.
W
ARNING: THE PUMP MUST NOT BE OPERATED WITH RESTRICTED SUC-
TION LINE (INLET) FLOW.
Positive gauge pressure must be maintained at the pump inlet (down stream
from the screen or filter). A clogged screen or filter will result in a greater pres-
sure drop than a clean screen or filter. To prevent possible pump damage
from low inlet pressure, a low-pressure alarm or shut-off switch should be
located between the screen or filter and the pump. A low-flow shut-off switch
should also be located in the same area.
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