The NCT Series is a combined centrifugal pump and squirrel cage induction electric motor built together into a single hermetically sealed unit. The pump impeller is of the closed type, and is mounted on one end of the rotor shaft which extends from the motor section into the pump casing. The rotor is submerged in the fluid being pumped and is, therefore, “canned” to isolate the motor parts from contact with the fluid. Bearings are submerged in system fluid and are, therefore, continually lubricated.
The Chempump has only one moving part, a combined rotor-impeller assembly which is driven by the magnetic field of an induction motor. A portion of the pumped fluid is allowed to recirculate through the rotor cavity to cool the motor and lubricate the bearings. The stator windings are protected from contact with the recirculating fluid by a corrosion resistant, non-magnetic, alloy liner which completely seals or “cans” the stator winding. The NCT Series are designed to handle fluids at elevated temperatures which, in most applications, exceed the temperature limits of the motor insulation system. The NCT Series design allows operation with process fluids up to 1,000 degrees Fahrenheit (538 degrees Celsius) while maintaining the motor windings below the maximum recommended temperature.