Do you know the working principle of peristaltic pump? Now let's learn about the working principle of a peristaltic pump: just like squeezing a fluid-filled hose with your fingers, moving the fluid forward as you slide your finger forward. Peristaltic pump is also the principle just replaced by the roller finger. The fluid is pumped by alternately squeezing and releasing the pump's flexible delivery hose. Like squeezing a hose with two fingers, a negative pressure builds up inside the tube as the fingers move, and fluid flows in. The peristaltic pump creates a "pillow" of fluid through a section of tubing between the two rollers. The size of the pillow depends on the inner diameter of the tubing and the geometry of the rotor. The flow rate depends on the product of the speed of the pump head and the size of the "pillow" and the number of "sleepers" produced per revolution of the rotor. The size of the pillow is generally constant (except when pumping particularly viscous fluids). Pumps with a larger "pillow" volume, when compared to pumps with the same rotor diameter, have larger volumes of fluid delivered per revolution of the rotor but also greater pulsations. This is the case with membrane valves. A smaller "pillow" volume pump, on the other hand, delivers less volume of fluid per revolution of the rotor; moreover, a small, "pillow" that is formed quickly and continuously produces a smoother fluid flow. This is the case with gear pumps. Peristaltic pump related articles to read: peristaltic pump superiority
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