Air Operated Diaphragm Pump

Chambers A & B are alternatively filled and emptied by drawing liquid in through a common inlet © and out through a common outlet (D). The Diaphragms in each chamber are connected by a common shaft so that they move., backwards together. Compressed dry air is directed by the air valve (E) alternatively behind each diaphragm to power discharge strokes. Pump speed and therefore fluid flow-rate can be infinitely controlled by increasing or decreasing or decreasing air pressure and or volume.