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AFH are exclusive sales and service partners for Hermetic – leaders and pioneers in canned motor pump technologies.


HERMETIC-Pumpen GmbH, founded and headquartered in Germany is a leading developer and manufacturer of hermetically sealed pumps and pumping technologies. The specialist for canned motor pumps has earned a worldwide reputation for its safe and long-lasting pumps, which can be used for the most extreme applications and conveying hazardous media.


Canned motor pumps use a canned motor which has the pump hydraulics placed on the same shaft as the motor’s rotor. This makes these pumps an excellent choice for pumping hazardous media, such as ammonia pumping in the refrigeration industry.

Drive is transmitted in the same way as a conventional electric motor. In between the stator and rotor, a stator liner (typically Hastelloy) is placed providing leak-free operation. The stator housing of the motor provides a fully pressure-rated secondary containment. The canned motor pump design is able to handle theoretically unlimited system pressure with references up to 1200bar. 450°C plus designs are possible as well as cryogenic units.

Designs are self-venting as per API685 and are available in single and multistage. Hydraulics can be customised with the only limitation being the current largest canned motor available is 800kW.

For optimal safety and plant reliability, the canned motor pump is the best technology.


  • Single and multistage versions available
  • Not susceptible to suction pressure
  • Flows to 1,200 m3/hr (higher on review)
  • Heads to 1200m (higher on review)
  • Cryogenic applications and perfect as ammonia pumps in the refrigeration industry
  • Temperatures up to 450C

Why sealless pumps?

Hermetic – the premier choice for refrigeration.