Displacement Pump

Wilden pumps, how do they work?

Hi,

What is the principle behind a "Wilden air-driven, double-diphragm, positive displacement pump?" I know, it is a long phrase but I am also ready for long answers 😉 Especially the term double-diphragm confuses me.
Thx in advance for any help.

The Wilden Pump website has a detailed description of the pumps operation.

http://www.wildenpump.com/techinfo/operation.cfm

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EATON VARIABLE DISPLACEMENT HYDRAULIC AXIAL PISTON PUMP PVE19AR 140710RE91003
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