Progressive Cavity Pumps

What sets this design apart is that it moves the fluid without crushing it: because shear is low, products containing solid particles, fibres, viscous media and shear-sensitive goods are transferred without their structure breaking down. Flow is proportional to speed and pulsation-free, which also suits dosing applications. Sludge, wastewater, food products, paints and polymer transfer are typical uses.

Series in our catalog offer flow rates from 4 m³/h to 200 m³/h and pressures of 6–24 bar; the capacity range runs from 1 l/h (at 1 bar) to 75,000 l/h (at 24 bar). Suction lift is 4–8 m, and in submersible applications the immersion depth is 1–8 m. In the shredder-coupled hopper option, solids are reduced to a size that can pass through the pump; it is designed for transferring organic waste and products such as fish and poultry.

The most critical operating rule is never to run dry: without lubrication the stator elastomer is damaged quickly. For a comparison with gear and lobe alternatives, see our viscous fluid transfer guide.