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 Intro to Peristaltic Pumps |
HOW MASTERFLEX® PUMPS WORK
Masterflex® tubing pumps from Barnant operate on a positive displacement principle. The pump head consists of only two parts: the rotor and the housing. The tubing is placed in the tubing bed – between the rotor and housing.
This flexible tubing has the suction and discharge nozzles attached at each end, and the drive-coupled rotor with mounted shoes (or rollers) squeezes the tube against an occlusion bed along a fixed path (1).
As the rotor completes each revolution, the fluid moves forward at a constant rate until it reaches the discharge nozzle, while the tubing behind the compression point returns to its original round shape (2), creating suction at the pump inlet port, and the hose bore refills. A "pillow" of fluid is formed between the rollers (3), which is specific to the ID of the tubing and the geometry of the rotor. Flow rate is determined by multiplying speed by the size of the fluid pillow.
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