Stuart Turner Multistage xxx-30 Series User Manual
Page 7
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Cont ...
2.18
Ambient temperature: The pump must be sited in a location where the maximum
ambient temperature does not exceed 50
o
C.
2.19
Pipework: For optimum performance pipework use 28 mm dia., 22 mm can be
used but will result in reduced pump performance.
Pipework should only reduce to 15 mm when entering terminal fitting.
2.20
Direction of flow: Ensure the water flow is in the direction of the arrow marked
on the flow switch reed clamp (vertically upwards).
2.21
Isolating valves: Separate isolating valves (non restrictive) must be fitted to
allow easy pump service.
2.22
Preferred pump location: The preferred pump location is below the water supply
that feeds the pump. The pump location is also dependent on limitations of the
static inlet and outlet heads of the installation.
Inlet head must be at least 1 metre (unless a suction lift is required then
see Fig. 4).
Maximum inlet should not exceed 10 metres.
Outlet head should not exceed 12 metres.
2.23
Pump Mounted Above Liquid Source (Suction Lift): This pump can be used
in a suction lift installation providing the height of lift is within the limits specified in
the limits of application section (Fig. 4).
A footvalve and strainer must always be used and the suction pipework size must
match the pump.
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.
Ensure all joints in suction pipework are completely airtight. Failure to comply will
result in loss of prime.
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.
When a footvalve is installed on installations that incorporate automatic pump
control, it is recommended that a suitable pressure relief valve be fitted in the
discharge (outlet) pipework from the pump.
Suction lift installation with
footvalve and strainer
Max suction lift (4.6 m)
Fig. 4