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Peristaltic Pump

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While peristalsis is the organic process, peristaltic pumps are actually positive displacement pumps used in a number of applications to transfer fluids from a point of high pressure to a point of low pressure. Read More…

Peristaltic Pump Peristaltic pumps are a unique type of metering pump that uses rollers to mimic the contracting and relaxing used in the gastrointestinal tract in order to move fluids from one place to another.
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Leading Manufacturers

Burlington, ON  |  289-812-7939

Our talented teams of designers and engineers will work closely with you in order to ensure that we are bringing you a product that will fit your every need and provide a long lasting value! For over 80 years, we have provided our customers with high quality small metering pumps and customer service that cannot be beat! To learn more about what we may be able to do to benefit you, call us today!

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Scherzinger Pump Technology Inc. $$$

Commerce, GA  |  706-335-5551

As a worldwide leader, Roper Pumps® provides premium quality pumps including metering pumps, chemical pumps, positive displacement pumps, liquid pumps and sealless pumps. Roper Pumps has taken pride in reliability, productivity, & safety, as well as excellent service since 1857.

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Roper Pump Company $$$

Oakland, CA  |  510-444-3731

Coker Pump & Equipment is your global supplier of metering pumps, process diaphragm pumps and packaged systems. We strive for a close partnership with customers to ensure your complete satisfaction from initial consultation to continuing service and repair, spare parts supply, maintenance and training. A leader in highly precise and high performance pumps, Coker Pump & Equipment works with you to find the best component for you.

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Coker Pump & Equipment $$$

Granite Bay, CA  |  800-230-1426

Cannon Water Technology offers a full line of metering pumps, chemical pumps and liquid metering pumps for all your water treatment issues. Among the metering pumps we have available, you can find what you need no matter what the application. Industrial chemical water treatment equipment also available.

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Cannon Water Technology Inc. $$$
placeholder image Scherzinger Pump Technology Inc. Roper Pump Company Coker Pump & Equipment Cannon Water Technology Inc.

Chemical, laboratory, medical, pharmaceutical, sewage treatment, painting, construction, packaging, agriculture, pulp and paper, water treatment and engineering facilities make frequent use of peristaltic pumping systems. Like all metering equipment, these pumps are designed to introduce a consistent and cyclical flow of liquid into a process stream in order to maintain the homogeneity of the final product or solution. The operation is unique among liquid pumps.

Although specific devices vary, the general function is similar. A length of flexible tubing is wound around a circular track which circumnavigates the pump head. One or more rollers are attached to the cylindrical center and used to compress the tubing at variable intervals. As the rollers move along they displace the fluids within the tube which are then exhausted through a release valve. When the roller is removed, the tube expands to its original volume creating a vacuum which pulls more fluid into the device and the cycle repeats.

Unlike many other types of pumps, including bellows pumps, diaphragm metering pumps and piston metering pumps; the pumping mechanism of the peristaltic pump never makes contact with the fluids it dispenses. This makes its use preferred in applications where sterile liquids are required such as medical and food and beverage processing.

There are three common operational designs associated with the peristaltic pump. Fixed occlusion pumps have a set interval at which rollers are placed and a set pressure which they may apply. This allows for little variation in tube size and material, but does provide constant pressure and consistent performance. Spring loaded roller pumps allow for more variation in materials and flow rates. These offer constant stress operation but adjust to the different sized tubes that may be used for different manufacturing processes.

The third type of peristaltic pump design is what is known as 360 degree eccentric. These mechanisms have a single over-sized roller that undergoes a complete revolution, compressing the tubing along the way. This particular design can increase flow per revolution up to 55% as compared to alternative designs of the same size. Though not always applicable, this third option also reduces the wear and friction on the tubing as it undergoes just one compression per revolution while others may experience stress three or four times during a single operation.

The heat and wear resistance of the particular tubing chosen for a pumping application such as this is very important. Extruded elastomeric materials such as silicone rubber and fluoropolymer are used as they maintain a circular cross-section despite multiple compressions. Chemical compatibility between the hoses and the fluids they will process is also of great importance. Further considerations include inner and outer diameter, pump drive or power source, flow rate, number of rollers and wall thickness.