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2.28 Pump Mounted Above Liquid Source (Suction Lift Installation):
Diagram showing typical Pressure Control
installation with suction lift.
2.29 The pumps can be used in a suction lift installation providing the height of lift is
within the limits specified in the limits of application section and the liquid to be
pumped is cold water (for applications other than cold water contact Stuart
Turner).
2.30 Before deciding where to locate the unit, check to ensure the static outlet head
(Fig. 7) does not exceed the maximum requirements 13 metres.
2.31 A footvalve and strainer may be used and the suction pipework size must match
the pump.
2.32 Lay the suction piping over the shortest possible distance and ensure there is a
constant rise from the liquid source to the pump. Any high spots will cause air
pockets to form, reducing system efficiency.
2.33 Ensure all joints in suction pipework are completely airtight. Failure to comply
will result in loss of prime.
2.34 The intake of the footvalve/strainer should be positioned such that it cannot be
blocked with debris or silt that are frequently found in the bottom of sumps and
wells.
2.35 When a footvalve is installed in the suction pipework, it is recommended that
suitable pressure relief valve be fitted in the discharge (outlet) pipework from the
pump.
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Note: This image is for
reference only
Fig. 7
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