A Air Diaphragm Pump diaphragm pump (also known as a Membrane pump) is a positive displacement pump that runs on the combination of the reciprocating action of a rubber, thermoplastic or teflon diaphragm and suitable valves on either part of the diaphragm
A dual diaphragm is a positive displacement pump which utilises two flexible diaphragms that reciprocate back and forth, creating a temporary chamber, which both draws in and expels fluid through the pump. … Both diaphragms that are linked by a shaft through the centre section where in fact the air valve is located.
Though this will depend upon the pump and application, a positive displacement pump, is generally a self-priming pump. … For instance, air managed diaphragm pumps self-prime by creating a pressure differential in the diaphragm chamber. This draws in air flow and pulls the liquid in to the suction port.