A diaphragm pump (also called a Membrane pump) is a positive displacement pump that runs on the mixture of the reciprocating actions of a rubber, thermoplastic or teflon diaphragm and suitable valves on either part of the diaphragm
A Air Diaphragm Pump double diaphragm is a positive displacement pump which utilises two flexible diaphragms that reciprocate backwards and forwards, creating a short-term chamber, which both allures and expels liquid through the pump. … The two diaphragms that are connected by a shaft through the center section where in fact the air valve is situated.
Though this will depend upon the pump and application, a positive displacement pump, is generally a self-priming pump. … For example, air operated diaphragm pumps self-prime by creating a pressure differential in the diaphragm chamber. This allures surroundings and pulls the fluid into the suction port.