Lobe Pump

A lobe pump is a rotary positive displacement pump with two externally timed, non‑contacting rotating lobes. Each lobe spins on its own shaft, and timing gears keep the lobes synchronized so they don’t touch. As the lobes turn, they create expanding spaces at the inlet that draw fluid in, carry it around the interior of the pump casing, and then expel it at the outlet, delivering a smooth, continuous flow.

1. What is a lobe pump?
A lobe pump is a type of positive displacement pump that uses pairs of externally timed, non‑contacting lobed rotors to move fluid through the pump housing with each rotation.

2. How do lobe pumps work?
As the lobes rotate, they pull fluid into the spaces formed between the lobes and the pump casing on the suction side. The fluid is carried around the inside perimeter of the pump—not between the lobes—and then released through the discharge as the lobes come back together.

3. What are lobe pumps used for?
Lobe pumps are especially useful for handling thin or viscous liquids and liquids that contain large solids because their large pump cavities and gentle non‑shearing action protect product integrity. They’re often chosen for applications requiring easy cleaning and hygiene, such as food, beverage, pharmaceutical, and sanitary processing environments.