Lobe Pumps

The pumping action of the rotary lobe pump principle is generated by the counter rotation of two pumping elements (rotors) within a chamber (rotor case). The rotors are located on shafts, which in turn are mounted within an external gearbox and supported by bearings; the timing gears are also located on the shafts.

The timing gears transfer the energy from the drive shaft to the driven shaft, synchronizing the rotors such that they rotate without contact with each other. As the rotors pass the suction port, the cavity generated increases creating a pressure decrease, which induces the pumped medium to flow into the rotor case.

These positive displacement pumps are perfectly suited for pumping hygienic products with higher viscosities. When the product becomes more viscous, the efficiency of this pump also increases. 

This lobe pump technology has the greatest flexibility regarding the shape of the rotor in function of the product to be moved. They can be equipped with a single-, double-, tri-, multi-, piston circumferential- or helical lobe. The single and double lobes can be used when a larger free passage is required, while the trilobes and multilobes come into play for the more dosing-oriented applications. The Helilobe in turn guarantees a pulsation-free operation, low NPSHr and the flexibility to work with high and low viscosity at different speeds, all in a nice TCO jacket.

Besides these standard stainless steel versions (316L), rubber rotors are also available which find their application in the wine industry or also alloys which allow a metallic contact between rotor and pump casing without damage (non galling rotors).

With the configure to order principle, the Packo lobe and piston circumferential pumps can be complete executed to the customer's wishes. Multiple connections, seal configurations and various elastomers applicable.