Operation Manual
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.
Discharge Line
Do
-
Install a non-return valve to prevent
turbining when high pressures are
applied to the pump whilst it is not
in use.
Do
-
Install valves if two pumps are to be
used on manifold/common
discharge lines.
Do -
Make the necessary piping
arrangements if steam is required
for heating /cooling tanks.
Plan View
Suction Line
Do not
- Subject the pump to rapid
temperature changes during C.I.P.
(Cleaning in Place) procedures.
Pump seizure can result from
thermal shock.
A suitable by-pass
is recommended.
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 the use of relief
valve, pressure switch, etc..
Do
-
Fit suction and discharge pressure
monitor points as close to the pump
ports as possible for diagnostic
purposes.
4.2 Direction of rotation
The direction of flow is dictated by the
direction of rotation of the drive shaft.
Reversing the direction of rotation will
reverse the flow direction.
STP125 Page 10
