Davey 6 Submersible Borehole Pumps - Manual (Page 3)

3
1. Delivery and Storage
1.1 Delivery
These submersible pumps are supplied from the
factory in proper packing in which they should remain
until they are to be installed.
During unpacking and prior to installation, care must
be taken when handling the pump to ensure that
misalignment does not occur due to bending.
The loose data plate supplied with the pump should
be fixed close to the installation site.
The pump should not be exposed to unnecessary
impact and shocks.
1.2 Storage and Handling
Storage temperature: -20°C to +60°C
The pump should not be exposed to direct sunlight.
If the pump has been unpacked, it should be stored
horizontally, adequately supported, or vertically to
prevent misalignment of the pump. During storage,
the pump can be supported as shown in fig. 1.
fig. 1
If the pump is not handled in a vertical position, it must
be lifted by the motor and the pump at the same time.
Note that the centre of gravity will vary, depending on
pump type & motor size.
2. General Data
2.1 General Description
All 6” & 8” submersible pumps are multistage pumps
working with counterclockwise direction of rotation
(observing from the delivery side) directly coupled
to special submersible motors (according to NEMA
rules).
PUMP IDENTIFICATION CODE
SS
2.2 Applications
These submersible pumps, are designed for a wide
range of water supply and liquid transfer applications,
such as the supply of fresh water to private homes or
waterworks, water supply to nursery gardens or farms,
drawdown of groundwater and pressure boosting, and
various industrial jobs.
The pump must be installed so that the suction motor
adaptor is completely submerged in the liquid. The
pump can be installed either horizontally or vertically,
see also section 3.1 Positional Requirements.
2.3 Pumped Liquids
Pumped liquids must be: clean, thin, free of solid
particles or fibres, compatible with pump components
and materials.
The maximum sand content of the water must not
exceed 50 g/m3. A larger sand content will reduce the
life of the pump and increase the risk of blocking.
When pumping liquids with a density higher than that
of water, motors with correspondingly higher outputs
must be used.
3. Installation at site
3.1 Positional Requirements
If the pump is to be installed in a position
where it is accessible, the coupling must be
suitably isolated from human touch. The
pump should be installed into a suitable
shroud.
The pump is suitable for both vertical and horizontal
installation, however, the pump should never be
installed below the horizontal, see fig. 2.
NOTE: During operation, the suction
motor adaptor of the pump must always be
completely submerged in the liquid. In special
conditions, it may be necessary to submerge
the pump even deeper, depending on the
operation conditions of the actual pump and
the NPSH value.
OK!
NO!