AODD Pumps

The pump is made up of two chambers. As the air forces the diaphragm to move in to the one chamber it forces the fluid inside into the outlet, whilst the other chamber fills up with fluid drawn from the inlet. As the diaphragm moves back into the opposite chamber, the fluid now in that chamber is forced out and the other chamber begins to fill up.

Ensuring compatibility with the fluid being pumped is a vital part of AODD pump specification to avoid swelling, erosion and even melting of the casing, diaphragm and balls. Our AODDs are available in PP, Aluminium or Stainless Steel and diaphragms in PTFE, EPDM, NBR, Hytrel and Santoprene. Upon disclosure of the fluid you are handling we will establish the best solution.

Yes - The Debem Food Boxer is constructed of food grade 316 Stainless Steel and PTFE, and the Saniboxer is 3A approved with 360 degree quick emptying system for CIP. The standard Boxer models however are reserved for non-food applications.

Thanks to the absence of a mechanical seal that needs cooling and lubricating, AODDs are able to run dry or against a closed discharge indefinitely without causing damage to the pump.

AODD pumps are very versatile in their ability to handle aggressive fluids, solids and viscous liquids, and their seal-less design meaning less leaks makes them ideal for hazardous fluids. They are however limited to the fact that they require a compressed air supply to be on site to operate the pump.

There are four common installation types. 1. Above the fluid as it is self priming. 2. Drum/tank mounted 3. Immersed (with an exhaustn tube vented to the atmoshpere) 4. Below the fluid with flooded suction

Yes! Whereas with an electric motor you would fit a variable speed drive, with an AODD you can simply adjust the air inlet pressure to control the flow you receive the other end.

Yes, air operated diaphragm pumps have excellent suction capabilities without need for a manual priming device.

Yes. Thanks to the absence of any close fitting or rotating parts, AODD pumps can handle solid content in fluids.

Yes! Debem Air operated diaphragm pumps are approved to ATEX Zone 2 as standard, with Zone 1 available upon request.

As well as a diaphragm that can run for 50 million cycles before replacement is expected, Debem AODD pumps have a lot fewer internal parts; 30 versus a typical 72 in other models.