Lobe pump

An early example of a lobe pump is the Roots Blower, patented in 1860[1] to blow combustion air to melt iron in blast furnaces, but now more commonly used as an engine supercharger.

Lobe pumps are used in a variety of industries including pulp and paper, chemical, food, beverage, pharmaceutical, and biotechnology.

They are popular in these diverse industries because they offer superb sanitary qualities, high efficiency, reliability, corrosion resistance and good clean-in-place and sterilization-in-place (CIP/SIP) characteristics.

Rotary pumps can handle solids (e.g., cherries and olives), slurries, pastes, and a variety of liquids.

Rotation of the lobes past the inlet port creates enclosed volumes of material between the rotors and the pump casing.

Since the lobes do not make contact, and clearances are not as close as in other Positive displacement pumps, this design handles low viscosity liquids with diminished performance.