Duty Cycle
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The duty cycle of a pump is the relationship
between the running time and the stationary (off) time, based on
one hour.For example; pond pumps are rated 24/7 (run 24
hours a day 7 days a week) which is a 100% duty cycle. Other
pumps, such as bilge pumps or sump pumps may have a duty cycle of
only 10% which means they can run for 6 minutes in one hour with
54 minutes cooling time. Exceeding the duty cycle limitations will
reduce the operating life of the pump.
The difference in the duty cycle is a reflection of
the performance, a sump pump produces a high volume with a high
pumping head, a pond pump produces a large volume flow with low
head, therefore requiring much less energy, it has less heat and
can be cooled by the pond water allowing 100% duty cycle.
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