a self-priming pump
If a Self-priming pump is installed like a standard pump, it will not self-prime. To understand why self-priming
pumps must be installed differently from standard centrifugal pumps, it is important to understand how
they work.
A pump is said to be primed when its casing and all the suction piping are full of liquid. The beauty of self-priming
pump is that they do not need either an external vacuum source or a foot valve and filling source.
Please note that a self-priming pump will re-prime if it becomes air bound.
when the pump works, bottom valve will lead to great hydraulic loss. But for the so-called self-sucking pump, it does not need to fill water when starting the pump (it still needs to fill water for the first starting after installation), and after short-time running, the pump can suck water and can be put into normal use.
2012-06-08
