Flooded Suction Pumps
What is a flooded suction pump?
A pump that uses a suctioned chamber that is continuously filled with liquid. It’s similar to a submersible pump in that it sits beneath the water and pumps from below. However, flooded suction pumps typically use different types of pumping mechanisms than submersible pumps.
How do they work?
Flooded suction pumps are easier and quicker to turn on and off because the chamber and piping inside of the pump are always filled with water – eliminating the priming step from the process. This can also be a disadvantage since there’s no way to completely block off the suction within the pumping chamber, unless there's a seperate suction valve. Without this valve, it makes it difficult to uninstall or service the pump, because you first have to drain all the water from the system.
Where are they used?
Because the self priming mechanisms of the pump make it possible to deliver water almost instantaneously, flooded suction pumps are useful in industrial applications where there must be no delay after a water feed is switched on. They’re also used in firefighting, and to prevent flooding in large swimming pools.
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