Progressive Cavity Pumps

The turning of the helical shaped rotor within the stationary stator creates a progressing cavity similar to a moving piston. Liquid is thus displaced generating a pumping action. Unlike piston pumping, extremely high pressure cannot be created because the stator is made of Nitrile and is flexible. Because of this flexibility, contaminated liquids can be handled. High starting torque motors are recommended in order to overcome the high starting friction of the stator.