Air Operated Double Diaphragm Pumps: What They Are and What They Do.

As a prolific importer of pumps into Australia, we import air operated double diaphragm (AODD) pumps for a variety of applications. We would like to tell you about how they work without bogging you down in too many technical terms and then tell you about some of the applications for AODD pumps.

Pumps in Australia - Air Operated Double Diaphragm Pumps

How AODD Pumps Work: the Short Version

AODD pumps are positive displacement pumps that have two diaphragms which are connected by a shaft in the middle section of the pump. The center section has an air valve.

The air valve shoots compressed air into the first diaphragm, moving it towards the side of the pump. This results in what is called a “press stroke” which pushes water out of the pump. Once in motion, the water is directed by check valves that force it to move towards the discharge point.

Since the diaphragms are connected, the press stroke of one diaphragm becomes a suction stroke for the other diaphragm and the air behind the second diaphragm is pushed out of the pump. The liquid is pushed to the suction side by atmospheric pressure.

There is a suction ball valve which is moved off of its seat by this action, pushing the fluid into the liquid chamber.

When the first diaphragm reaches the end of its stroke, the air valve then directs the air towards the back of the second diaphragm. Then the process for the second diaphragm moves along the same as for the first one. The diaphragms alternate in this fashion, moving fluids efficiently.

AODD Pump Applications

AODD pumps are versatile and can pump fluids from water to slurries. They are used for general fluid transfer, dewatering, spraying, cleaning and filter pressing. Because they are very precise, they are often used for metering, dispensing and filling.

For the Best Imported Pumps in Australia

For the best imported pump products in Australia, call Pump Solutions Australasia today: 1300 793 418.