Canned motor pumps of HERMETIC
How canned motor pumps work
HERMETIC canned motor pumps meet the highest safety requirements thanks to their design with a double safety shell. Hydraulics and motor are not separated – both form one unit. This means that no added couplings or seals are required. Canned motor pumps are therefore leak-free.
The impeller, or impellers in the case of multi-stage pumps, are attached directly to a hollow shaft. The hollow shaft on two plain bearings is submerged in the liquid or the conveying medium that dissipates the heat from the motor and lubricates the plain bearings. The motor consists of a rotor and a stator. The rotor is directly connected to the hollow shaft. As a result, the hollow shaft and the impellers rotate automatically as soon as the rotor starts turning. The stator lies outside the liquid area and is separated from the rotor by a so-called rotor lining.