The Canned Motor Pump is composed of a traditional centrifugal hydraulic, connected to a special motor through a one piece assembly. The stator is canned in the air gap, confining the liquid in the rotor chamber. The pump liquid circulates through the rotor chamber, cooling the motor, and lubricating the slide bearings that support the rotor. The casing of the chamber forms a sealless enclosure that confines the liquid without any dynamic sealing.
Moreover, in case of stator liner rupture, the liquid remains confined in the motor’s shielded shell (able to resist to explosions), and thus cannot leak externally. It is what we call the double security or double confinement. This gives the sealless canned motor pumps a decisive advantage against the magnetic drive technology which, in case of air gap hood, presents an immediate external leak.
Finally, the mechanical simplicity of the one piece canned motor pump, gives it many important technical advantages: Mechanical balance, Space benefit, No alignment, Low maintenance requirements, Silent functionning, Operationnal in explosive areas, Easy & effective surveillance, Various possibilities of motor cooling systems …