Air Diaphragm Pump

A diaphragm pump (also called a Membrane pump) is a positive displacement pump that runs on the combination of the reciprocating actions of a rubber, thermoplastic or teflon diaphragm and suitable valves on either side of the diaphragm

A dual diaphragm is a positive displacement pump which utilises two flexible diaphragms that reciprocate back and forth, creating a short-term chamber, which both draws in and expels fluid through the pump. … The two diaphragms that are linked by a shaft through the centre Air Diaphragm Pump section where in fact the air valve is located.

Though this will depend upon the pump and application, a positive displacement pump, is normally a self-priming pump. … For example, air managed diaphragm pumps self-prime by creating a pressure differential in the diaphragm chamber. This draws in atmosphere and pulls the liquid in to the suction port.