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They can handle virtually any non-homogeneous fluid, regardless of viscosity, lubricity or abrasiveness 
e. g. seawater, bitumen, molasses, lime, acid, caustic solution or hydrocarbon

While pumping there is no metal-to-metal contact within the pump housing. This allows good pumping performance even with non-lubricating and corrosive and contaminated fluids. 

As the pump rotates, the intermeshing of the two screws along with the pump housing form chambers. These chambers fill with the pumped fluid and move it from the suction side of the pump to the higher pressure discharge side of the pump.

The pump is designed to allow for reverse flow by simply changing the shaft direction. The suction becomes the dis-charge and vice versa, all without any modifications to the pump.

Bornemann progressive cavity pumps are compact, rugged and powerful. They are available in various power ratings and combinations of materials. They have proved their value world-wide in public and industrial waste water treatment and in waste disposal. 

They are an optimum solution to conveying tasks in the chemical and petrochemical industries, the food, cosmetics and paper industries, in building construction, mining and general industry - everywhere the conveyed product is too viscous and flows too poorly to be pumped by other types of pumps.

Bornemann progressive cavity pumps consist of only one moving part - a driven metal (inelastic) rotor, rotating within an elastomer lined (elastic) stator. As the rotor turns, chambers are formed between the rotor and stator. These chambers progress axially from the suction to discharge end, moving the fluid.

By increasing the pitch of the rotor and stator, additional chambers or stages are formed. The design allows pumping in both directions, a high suction lift and cautious pumping. Due to the numerous combinations of material for rotor and stator and the cautious pumping with extremely low shear forces, the progressive cavity pumps are also highly suitable for measuring and metering tasks.