20 POTATO GROWER | FEBRUARY 2019
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Priming
There are a lot of suction lift applications in irrigation
systems. Some regions rely on surface water, and some
regions use wells as a water source. For the regions that
have surface water, a horizontal pump with a suction lift
is a common sight. Tiny leaks in the supply pipe, leaks in
fittings, intakes that can draw air when the water is rough,
or dropping water levels can cause a pump to lose its prime.
Faulty foot valves allow pumps to lose their prime between
operating cycles. Priming devices can include hand pumps,
electric pumps to fill the supply pipe with water, and vacuum
pumps. Suction lift applications are a cost-effective way to
install a pump initially (lower construction costs), but often
require more maintenance to keep them running. Valley
Irrigation has had recent success with submersible pumps
and floating pumps that do not require priming.
This is only a short list of the common
problems that we see. When looking at
investing in new irrigation equipment,
be sure to keep these in mind and rely
on trusted experts to ensure you receive
a quality irrigation pumping system that
isn't plagued by problem after problem.
