Operating Manual
PLAN VIEW
SUCTION LINE
PLAN VIEW
SUCTION LINE
Discharge
Line
4.0 System Design and Installation
4.1
System Design Advice
When designing the pumping system :-
DO
-
confirm with the supplier the Net
Positive Suction Head (NPSH)
requirements for the system, as this
is crucial for ensuring the smooth
operation of the pump and
preventing cavitation.
DO
-
avoid suction lifts and manifold/
common suction lines for two pumps
running in parallel, as this may cause
vibration or cavitation.
DO
-
protect the pump against blockage
from hard solid objects e.g. nuts,
bolts etc. Also protect the pump
from accidental operation against a
closed valve by using one of the
following methods :- relief valves,
pressure switch, current monitoring
device.
DO
-
fit suction and discharge pressure
gauges to monitor pressures for
diagnostic purposes.
DO
-
install non-return valve to prevent
turbining when high pressures are
applied to the pump whilst it is not in
use. Valves are also recommended
if two pumps are to be used on
manifold/common discharge lines.
DO -
provide a hose cleaning facility to
assist maintenance, ensuring the
drive unit meets the specification for
hose cleaning.
DO NOT
- subject the pump to rapid
temperature changes during C.I.P.
(Cleaning in Place) procedures.
PUMP SEIZURE CAN RESULT
FROM THERMAL SHOCK.
The
differential pressure across the
pump should be near zero when
cleaning. A suitable by-pass is
recommended.
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