Functioning of a Peristaltic Pump Explained
Peristaltic pumps are a type of positive displacement pump that have found widespread use in various industries due to their versatility and reliability. These pumps were inspired by the natural mechanism of peristalsis, a series of muscle contractions that support the automatic processes of the digestive system.
The pumps work by compressing a flexible tube between the pump housing and the rollers. This flexible tube, which can be made from materials like silicone, natural rubber, fluoropolymer, or polyvinyl chloride (PVC), contains the fluid to be pumped. The number of rollers used in a peristaltic pump can affect how it handles fluids and can help maintain consistent levels of pulsation.
Peristaltic pumps are known for their ability to pump fluids without contamination or contact with moving parts, making them ideal for sterile or corrosive fluids. They are commonly used in the medical field for safe delivery of pharmaceuticals and other critical liquids to the patient. Vantage MedTech, a pioneer in the medical device industry with over 25 years of experience in FDA-approved device manufacturing in the U.S., is a trusted partner for medical device projects.
The pumps can support a range of flow rates based on their size. Small peristaltic pumps can be used in laboratories, while larger pumps are suitable for industrial applications. The flow rate of a peristaltic pump depends on the inner diameter of the pump tube; a larger inner diameter results in a higher flow rate.
Variable speed peristaltic pumps are used for continuous pumping at a variety of motor speeds. The four common types of motors for peristaltic pumps are: Brushed direct current (DC motor), Brushless direct current (BLDC motor), Alternating current (AC motor), and Stepper motor.
It is important to give special consideration to the diameter of the tubing utilized to maximize the life of the tube. For chemically corrosive media, fluoro elastomeric materials are often used to protect the tubing from corrosion. Some peristaltic pumps offer multiple channels, allowing different media to be pumped simultaneously through different tubes, but care must be taken to avoid cross-contamination.
Peristaltic pump suppliers often supply pumps for various industries, including food and beverage, biopharmaceutical, water and waste treatment, chemical, print and packaging, and ceramics. Ease of use, including the time it takes to change the tubing, is an important factor to consider when purchasing a peristaltic pump.
Innovation continues to play a key role in the development of peristaltic pumps. Pump manufacturers must adapt to the evolving needs of the customer and employ cutting-edge technology and innovative methodologies in developing peristaltic pumps. For instance, some pumps may have special features that allow adjustment of pressure levels, such as when transitioning from soft silicone tubing to tough fluoroelastomer tubing.
The pumps also have the advantage of allowing fluid to be pumped with a precisely measured volume specific load of liquid material. This makes them ideal for applications where precise control over the flow rate is essential. With their versatility, reliability, and safety features, peristaltic pumps are set to continue revolutionizing industries for years to come.
