APPLICATION:
Surface pumps and booster pumps which are the subject of this manual are intended
for water supply to households from individual water intakes. The devices can also be
used to increase pressure, provided that the inflow pressure on the suction side does
not exceed 3 bars (300000 Pa). When the pumps are used in municipal (collective)
water systems, a non-return valve must be installed before the pump to prevent water
return to the public water system. The devices described in the manual can be used to
pump water from dug or bored wells, provided that the negative pressure, necessary
for water suction, does not exceed 8 m of water column. The value of negative
pressure is influenced by such factors as (the values sum up):
1) vertical distance between the water level and suction pump of the booster set,
pump (depth). One meter of depth corresponds to one metre of negative pressure.
2) length and diameter of the suction pipe. 10 m long suction pipe with diameter of 1”
corresponds to 1.5 m of negative pressure, i.e. 0.15 m of negative pressure per 1 m
of the pipe. 10 m long suction pipe with diameter of 1
1
/
4
” corresponds to 1 m of
negative pressure, i.e. 0.1 m of negative pressure per 1 m of the pipe. Note: the
length of the vertical section must be also taken into account in calculations
Example:
The booster set is set at the distance of 10 m from the well where the depth to the water level is 5 m. A
suction pipe with 1” diameter was used in assembly.
The negative pressure connected with the depth is 5 m.
The negative pressure connected with the length and diameter of the suction pipe is
(5vertical section+10horizontal section) x
0.15for diameter 1” =
2.25 m
In total, the negative pressure is 5_2.25 = 7.25 m. In this example the negative pressure of 8 m is not
exceeded and the booster pump should operate without problems.
If the negative pressure of 8 m is exceeded during operation (e.g. when the water level decreases
during pumping), the booster pump can be damaged due to operation without water flow. This type of
failure is not subject to warranty repair. Bearing the aforementioned in mind, if it is possible that the
water level will decrease, e.g. during droughts or intensive plant watering, the booster set must be
installed in such a manner that a possibly high negative pressure reserve is preserved. For this purpose,
it is preferable to install the booster set or pump at a short distance from the well and the recommended
cross-section of the water pipe to use is 1
1
/
4
”.
Warning!! Using suction pipes with diameter lower than 1” is prohibited. In such a
case, the booste pump will not start pumping water, and if it starts - it may be
damaged due to lack of water flow. This type of failure is not subject to warranty
repair.
The device is intended for pumping of clean water, with no solid or abrasive particles.
Pumping water containing sand results in fast wear and tear of the pump and, in
consequence, it its failure. In such a case, only paid repair is available.
It is prohibited to use additional filters (except for well filters) on the suction side of the
pump. This type of filters reduces the water flow and increases the actual pump
suction height. In such a situation, when the filter is soiled, the water column in the
suction pipe can be interrupted, causing operation of the pump without water which
can result in device failure. Failures caused by operation of the pump without water -
“dry”, or without flow are not subject to warranty repairs.
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