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Submersible pump
A submersible pump (or sub pump, electric submersible pump (ESP)) is a device which has a hermetically sealed motor close-coupled to the pump body. The whole assembly is submerged in the fluid to be pumped.() The main advantage of this type of pump is that it prevents pump cavitation, a problem associated with a high elevation difference between pump and the fluid surface. Submersible pumps push fluid to the surface as opposed to jet pumps having to pull fluids. Submersibles are more efficient than jet pumps.
== History ==
Ca. 1928 Russian oil delivery system engineer and inventor Armais Arutunoff successfully installed the first submersible oil pump.〔(A Historical Perspective of Oilfield Electrical Submersible Pumps )〕 In 1929, Pleuger Pumps pioneered the design of the submersible turbine pump, the forerunner of the modern multi-stage submersible pump.〔(World Pumps: A Brief History of Pumps )〕 In the mid 1960s the first fully submersible deep-well water pump was developed.〔(Grundfoss Museum- Youtube )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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