Force Pump, Double Acting (from Internet Glossary of Pumps)
Force Pump, Double-Acting
This pump is more efficient that a single-acting force pump such as a simple Lift Pump or a hand-operated Bilge Pump.

Each stroke of the piston fills one chamber and empties another, which nearly doubles the flow rate (less the volume of the piston rod) over a single-acting force pump. It also smooths the flow.

From the outside this pump can take many forms, but the basic principal of operation will be identical.

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Go to web page describing Statistics Explained

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Last modified February, 2002
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