Double Diaphragm Pump

The Air Operated Diaphragm Pump (AODD Pump) is a positive displacement pump. It comprises two pumping chambers that are alternately filled and released by flexible diaphragms moving back and forth. To provide the pumping motion, compressed air is alternately delivered to and vented from air chambers on opposing sides of the diaphragms. Sludges, slurries, abrasive, and shear sensitive fluids may all be handled by Air Operated Diaphragm Pumps, which are commonly employed for transfer applications. They are durable, dependable, and simple to operate, but they are loud, prone to icing, and only suitable for low-pressure applications. When many viscosity chemicals must be handled by the same AODD Pump, Air Operated Diaphragm Pump is employed.

How does an Air Operated Diaphragm Pump work?​

An Air Operated Diaphragm Pump transfers fluid by alternating and repeating back-and-forth movement (strokes) of two flexible membranes or diaphragms mounted on a common shaft. Although a Diaphragm Pump may be controlled simply by attaching the shaft to a motor, an AODD Pump uses compressed air and a sophisticated distribution system to alternately distribute air to two air chambers A and B on opposing sides of the diaphragms.

Assume there are two chambers—A and B.

  • The compressed air control system sends air into air chamber A.
  • An Air Operated Diaphragm Pump transfers fluid by alternating and repeating back-and-forth movement (strokes) of two flexible membranes or diaphragms mounted on a common shaft. Although a Diaphragm Pump may be controlled simply by attaching the shaft to a motor, an AODD Pump uses compressed air and a sophisticated distribution system to alternately distribute air to two air chambers A and B on opposing sides of the diaphragms.
  • Assume there are two chambers—A and B.
  • The compressed air control system sends air into air chamber A.
  • When the shaft completes its stroke, the air distribution system vents air chamber B, and the cycle starts over when compressed air is given to air chamber A.