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How Does A Positive Displacement Pump Work?

A positive displacement pump works when liquid flows into the pumps as the cavity on the suction side expands and the liquid flows from the discharge as the cavity collapses. On the suction side the pump has an expanding cavity and a decreasing cavity on the discharge side. The volume is constant in each cycle of operation.
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What is a positive displacement pump?
Any pump that mechanically changes the volume of a chamber to drive the fluid. It can be a reciprocating piston, a pair of intermeshing gears or lobes, hook-and-claw, drag chain, etc. This is opposed to a centrifugal pump that drives liquid by  www.quora.com
What is a positive displacement pump?
Answer A positive displacement pump causes a liquid or gas to move by trapping a fixed amount of fluid or gas and then forcing (displacing) that trapped volume into the discharge pipe. Positive displacement pumps can be further classified as either  wiki.answers.com
What is a positive displacement hydraulic pump?
A positive displacement pump causes fluid to move by trapping a fixed  www.chacha.com
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