A peristaltic hose pump is a type of positive displacement pump that uses a squeezing or rolling action to move fluids through a flexible tube or hose.
It's often referred to as a "hose pump," "peristaltic pump," or "squeeze pump." This pump operates based on the principle of peristalsis, which is the rhythmic contraction and relaxation of muscles that helps move substances through tubes in biological systems, such as the esophagus.
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Here's how a peristaltic hose pump works:
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Tube or Hose: The pump has a flexible tube or hose made of materials that can withstand the squeezing action without significant wear or deformation. This hose is usually made of elastomers or other resilient materials.
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Rollers or Shoes: Inside the pump, there are rollers or shoes that are mounted on a rotor. As the rotor turns, these rollers press against the outside of the hose, creating a squeezing or compressing action.
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Fluid Movement: As the rollers compress the hose, the volume of the fluid-filled portion of the hose is reduced. This squeezing action creates a positive displacement, forcing the fluid to move in the direction of the pump outlet.
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Roller Action: As the rotor continues to turn, the rollers move along the length of the hose, releasing the pressure on the previously squeezed portion. This allows the hose to return to its original shape, which creates a vacuum effect that draws more fluid into the pump.
Peristaltic hose pumps have several advantages:
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Gentle Handling: Since the fluid only comes into contact with the interior of the hose, there is minimal risk of contamination or interaction with pump components. This makes them suitable for pumping sensitive, abrasive, viscous, or corrosive fluids.
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Metering and Accuracy: The pump's positive displacement action makes it well-suited for precise metering applications where accurate flow rates are crucial.
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Self-Priming: The pump is self-priming, meaning it can draw fluid into the hose without the need for additional priming mechanisms.
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Reversible Operation: The direction of flow can be easily reversed by changing the rotation direction of the rotor, which can be useful in various applications.
Peristaltic hose pumps find applications in a wide range of industries, including pharmaceuticals, food and beverage, water treatment, mining, chemical processing, and more. They are often used in situations where maintaining the purity and integrity of the pumped fluid is important, and where precise flow rates are required.
