air operated diaphragm pump airPUMP



  • Easy to install
  • Simple to operate
  • Portable
  • Self-priming
  • Submersible
  • Dry running
  • Solids handling 


  • Mining
  • Paints and Coatings
  • Ceramics
  • Pulp and Paper
  • Electroplating and Anodizing
  • Wastewater
  • Marine
  • OEM‘s
  • Chemical Manufacturing and Distribution 



Type Connection max. Flow rate plastic max. Flow rate metal
AP025 1/4" 22 l/min -
AP05 1/2" 72 l/min 76 l/min
AP10 1" 185 l/min 212 l/min
AP15 1 1/2" 473 l/min 503 l/min
AP20 2" 583 l/min 590 l/min
AP30 3" - 908 l/min

Available Materials: PP, PVDF, Aluminum, Stainless steel

Please find more details in our product information




Air operated double diaphragm pumps are positive displacement pumps that use a combination of the reciprocating action of two flexible diaphragms, two inlet and two outlet ball check valves to pump a fluid. There are two pump chambers which are divided by the diaphragms into air and fluid regions. The two dia- phragms are connected to a common shaft located in the center section. This creates the effect that during a cycle one side is pumping fluid while the other side is filling. 


As the common shaft located in the center section moves to the right, the diaphragm in the left chamber moves towards the center section.

This movement creates a vacuum on the liquid side of the left diaphragm, lifting the lower ball check valve, allowing liquid to flow through the suction manifold into the liquid chamber. At the same time, any fluid in the right chamber is discharged. 

Saughub Druckluftmembranpumpe