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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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How do positive displacement pumps work?
simple explanation is the work like filling a bath up and then getting into it: The water level rises, as you displaced it. When you get out the level falls back to original level, UNLESS you have overflowed the bath, in which case it falls to a  answers.yahoo.com
How Does a Vacuum Pump Work?
Vacuum technology plays a significant role inside today's manufacturing process. Its ability to create or generate power is a necessary step in the manufacturing of semiconductors, power brakes, the cruise control function in cars, as well as in  www.ehow.com
How does water displacement work when finding the volume of an irregular object?
I am not sure what you mean exactly, but I will take a stab. The volume of water displaced is equivalent to the volume of the submerged object. This, of course, assumes there isn't enough buoyancy force to keep any part of the object from being  wiki.answers.com
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