Air Operated Diaphragm Pumps

The most popular type of diaphragm pump is the Air-Operated Diaphragm Pump. These pumps use compressed air as their power supply. They also include two chambers with a diaphragm, inlet check valve and outlet check valve in each chamber. The air supply is shifted from one chamber to another with an air spool valve that is built into the pump. This continual shifting of air from one chamber to another (to the backside of the diaphragm) forces liquid out of one chamber and into the discharge piping while the other chamber is being filled with liquid. There is some pulsation of discharge flow in Air-Operated Diaphragm Pumps. This pulsating flow can be reduced somewhat by using pulsation dampeners in the discharge piping.

Small Air Operated Diaphragm Pumps from Flojet & Shurflo

Small Air-Operated Diaphragm Pumps

These pumps typically have 3/8", 1/2" or 3/4" inlet and outlet ports and flowrates of 2 to 10 GPM.

Tom Hansen, P.E.  |  Dultmeier Sales
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