How an AODD works

How does an air-operated double diaphragm pump work?

AODD pumps transfer fluid through the pump using compressed air power. The pump consists of reciprocating diaphragms that expand and contract pumping chambers. The three main components of the pump are suction and discharge manifolds, suction and discharge valves, and liquid and air chambers. The air chambers are separated by diaphragms, which are in turn connected by a shared shaft. As one air chamber is filled with compressed air, the diaphragm in that chamber expands into the pump chamber and displaces the transferred fluid, directing it into the discharge manifold. Simultaneously, a vacuum is created that pulls the fluid past the suction valve and into the pump chamber. When maximum capacity is reached, this process reverses; the suction side becomes the discharge side and vice versa.