What is peristaltic pumps?

A peristaltic pump is a type of positive displacement pump used for pumping a variety of fluids. The fluid is contained within a flexible tube fitted inside a circular pump casing. A rotor with a number of 'rollers', 'shoes', or 'wipers' attached to the external circumference compresses the flexible tube. As the rotor turns, the part of the tube under compression is pinched closed, forcing the fluid to be pumped to move through the tube. Additionally, as the tube is pinched closed, it draws fluid into the tube. This process is called peristalsis and is used in a variety of medical and industrial applications.