The single-stage canned motor pumps of the model series CNP, CNPF and CNPK are characterised by a compact, integrated unit without mechanical seal. The motor and the pump form a unit with the rotor and the impeller fitted onto a common shaft. The rotor is guided by two identical, medium-lubricated slide bearings. The heat loss from the motor is carried off by a partial flow between the rotor and the stator. At the same time, the partial flow lubricates both slide bearings in the rotor cavity. Both the can, which is a hermetically sealed component, and the motor casing are used as a safety containment.
The pumps can be used between -120 and +360 °C, in case of the CNPK to +425 °C. The motors are protected in IP 68, the terminal box in IP 55. The pumps are suitable for aggressive, toxic, explosive and slightly volatile fluids. The CNPF can also be used for liquid gases.
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