lobe pumps

Rotary lobe pumps are positive-displacement type pumps that use two or more lobes rotating around parallel shafts in the pump’s body to move liquids. They are widely used in the hygienic processing industries, including food & beverage processing and biopharmaceutical manufacturing.

1. As the lobes come out of mesh, they create expanding volume on the inlet side of the pump.  Liquid flows into the cavity and is trapped by the lobes as they rotate.
2. Liquid travels around the interior of the casing in the pockets between the lobes and the casing — it does not pass between the lobes.
3. Finally, the meshing of the lobes forces liquid through the outlet port under pressure.