Peristaltic pumps - how do they work?

Ease of operation comes from simple tube loading.

In applications where a disposable tube set is required, the tube must be replaced once per procedure, which could occur several times each day depending upon your specific process or application. It is critical that tube changeover is done correctly to avoid compromising pump performance. 

For example, Watson-Marlow LoadSure technology offers snap-fit one minute maintenance.

A peristaltic pump requires no valves in its operation because at least one roller is always compressing the tube against the track, preventing backflow or siphoning when the pump stops.

Because peristaltic pumps are positive displacement pumps moving a fixed volume for each revolution, flow rates are linearly proportional to speed over the pumps recommended speed range.

When calibrated to account for system losses, a peristaltic pump can achieve metering and dosing accuracy of ±0.5%.

For example, delivering flow rates that remain constant right up to 7 bar Qdos peristaltic chemical metering pumps give users a unique advantage over diaphragm metering pumps.

Peristaltic pumps need no priming and can run dry without damage. 

For example, our Bredel peristaltic hose pumps are dry running and self-priming with no ancillary equipment, check valves, sealing water flush systems or run-dry protection required.

With most positive displacement pumps that deliver a fixed volume per pump stroke or revolution, pulsation or pressure drop can be observed.

With a peristaltic pump, the only wetted part is the tubing. In sanitary medical applications, the pump will not contaminate a sterile fluid in the tube, and the pump will not require cleaning. In most medical applications, the tube is the part of a disposable tube-set that is connected to other components such as a catheter.

As a total solution provider, did you know we also supply solutions to help complete your fluid path including our BioPure fluid path components and Aflex PTFE hoses.