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Submersible pump

9 bytes added, 03:13, 13 December 2012
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[[Image:sub pump.jpg|thumb|right|250px|Engineers work to repair the pump for the only deep well in Damajale, Kenya, a host community for thousands of Somali refugees. Photo: [http://humanitarian.worldconcern.org/tag/disaster-relief/ WorldConcern.org]]]
[[Image:SubmersiblePumpDiagram.jpg|thumb|right|250px|Submersible pump. <br> Photo: WHO.]]
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For deep-well applications, centrifugal pumps are housed with the electric engine in a single unit that is designed to be submerged. Usually, a multiple-stage
pump is used. The multiple-stage pump is placed above a motor and under a check valve that leads to the rising main. Submersible pumps are self-priming, if they do not run dry. To prevent the pump from running dry, the water level in the well must be monitored, and pumping must be stopped if the water level drops to the intake of the pump.
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