How does the peristaltic pump work?

Composition of Peristaltic Pump

The peristaltic pump consists of three parts: driver, pump head, and hose. The main competitive advantages of the peristaltic pump are fluid isolation in the pump tube, rapid replacement of the pump tube, fluid retrograde, dry operation, and low maintenance costs.

Working principle of peristaltic pump

A peristaltic pump works like squeezing a fluid-filled hose between your fingers. The fluid moves forward as you slide your finger forward. Peristaltic pumps work the same way but with rollers instead of fingers. The fluid is pumped by alternately squeezing and releasing the pump's flexible delivery hose. Like squeezing a hose between two fingers, as the fingers move, negative pressure forms inside the tube and the liquid flows with it.

A peristaltic pump is a "pillow" shaped fluid formed in a pump tube between two rotating rollers. The volume of the "pillow" depends on the inner diameter of the pump tube and the geometry of the rotor. The flow rate depends on the product of three parameters: the speed of the pump head and the size of the "pillows" and the number of "pillows" produced by the rotor per revolution. The size of the "pillow" is generally constant (except when a particularly viscous fluid is pumped).

Compared with pumps with the same rotor diameter, a pump with a larger "pillow" volume has a larger volume of fluid transported by its rotor per revolution, but the pulsation degree is also larger. This is similar to the situation of membrane valves. A pump with a smaller "pillow" volume delivers a smaller volume of fluid each revolution of its rotor; Moreover, the rapid and continuous formation of a small "pillow" makes the fluid flow more stable. This is similar to the way gear pumps work.

Peristaltic pump application field

Chemical industry; mining and metallurgy industry; paper industry; paint and coating industry; food industry; ceramic industry; petroleum industry; water treatment industry; pharmaceutical industry; medical device industry, etc.

Pharmaceutical industry application: the application of peristaltic pumps in the pharmaceutical industry is mainly used for drug coating granulation and liquid dispensing. Spray drying granulator is also called dry granulator and fluidized bed granulator, which is used to spray special icing on the surface of various particles and form particles after drying. This pelletizer itself specific dry heat source, can play the purpose of evaporation of water, but water evaporation and particle formation is a dynamic relationship, so the amount of liquid and water need to be sprayed into the very precise, to ensure a certain humidity of particles to facilitate the perfect formation of particles.

Choose Chuangrui peristaltic pump

Chuangrui precision pump is a Chinese leading manufacturer of peristaltic pumps. Focuses on the peristaltic pump, Syringe Pump, OEM pump, gear pump. We have a variety of product series, only to provide you with the best solution. Flow rate: 0-33000ml/min.