Pump Principles

Operating Principles of a Progressing Cavity Pump

The major components of a PC pump include a stator assembly, rotor, suction housing, seal and bearing assembly, and a coupling rod. FRC PC pumps feature a single rotating assembly. Each turn of the rotor dispenses a precise amount of material, either in doses or continuously and accuracy is generally unaffected by viscosity or density.

The stator assembly is a hollow metal jacketed elastomeric tube with a double helical passage through the center. The rotor is a single helical rod which closely fits within the stator, forming separate sealed cavities along the entire length of the assembly. Rotational motion of the rotor is provided through the seal and bearing assembly and through the suction housing by an articulated coupling rod. As the rotor turns, sealed cavities progress from the entrance of the stator and exit at the discharge side.

FRC PC pumps are identified by the amount of material discharged per one full revolution. Due to the rolling nature of the engagement between the rotor and stator, abrasive materials cause significantly less wear on wetted components. Reliability and life are greater than any other known metering solution.

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