Air Operated Double Diaphragm (AODD) Pumps


Air-Operated Double-Diaphragm (AODD) pumps are classified as reciprocating, positive-displacement-style pumps. They operate by displacing fluid from one of its two liquid chambers upon each stroke completion. To operate, the diaphragm pumps require a given amount of pressure and air volume to deliver the proper amount of fluid. The simple genius of the AODD pump design means that there are only a few wetted parts that are dynamic: the two diaphragms, which are connected by a common shaft, the two inlet valve balls and the two outlet valve balls. These pumps widely confirm to API 676, 3rd edition and are ATEX and CE certified.

Water supply systems

Cooling circuits

Swimming pools

Fire-fighting systems

Flow Rate

Up to 60 m3/h


Up to 10,000 cST


Up to 10 Bar


Up to 80C

Aluminium Body

Stainless Steel Body

PP or PVDF Body

Dry-run without damaging the pump or system

Self-priming, works in suction lift applications

Deadheads safely, with no pump or product damage

Shear sensitive, does not shear or separate product being pumped

Submersible, can be submerged completely without safety or performance issues

Sealless design, no expensive mechanical seals or packing are required

Variable flow and head pressures, without sophisticated controls

Optional bottom discharge porting depending on fluid characteristics

Housing Components : Aluminium, Stainless Steel, Polypropylene, PVDF

Diaphragm : Nitrile, EPDM, PTFE, Teflon

Valve Balls : Stainless Steel, PTFE, Santoprene

Valve Seats : Rubber, PVDF, Polypropylene