How do peristaltic hose and tube pumps work?

Advantages of a peristaltic hose and tube pumps

Every peristaltic pump features a flexible hose or tube, giving an open flow path which gives a high resistance to abrasion and permits the easy flow of solids, high S.G. and viscous media. Despite the capacity for pumping some of the world's most difficult fluids, the pump itself delivers a gentle pumping action, making it suited for shear-sensitive product such as polymers and even whole fish!

The flow of the pump is proportional to the speed, making it suited for dosing. As a peristaltic pump is available both in large and small models, it may be used from laboratories to mining applications.

The hose prevents cross-contamination. For safety and peace of mind, the pump has no mechanical seals and in the event of a hose rupture, contains the fluid safely.

THE WORKING PRINCIPLE OF A peristaltic PUMP

Peristalsis

Peristaltic pumps are a type of positive displacement pump used for pumping a variety of fluids. The fluid is contained within a flexible hose or tube fitted inside the pump casing. The actual pumping principle, called peristalsis, is based on alternating compression and relaxation of the hose or tube, drawing content in and propelling product away from the pump. 

A rotating shoe or roller passes along the length of the hose or tube creating a temporary seal between the suction and discharge sides of the pump. As the pump’s rotor turns this sealing pressure moves along the tube or hose forcing product to move away from the pump and into the discharge line. Where the pressure has been released the hose or tube recovers creating a vacuum, which draws the product into the suction side of the pump, the priming mechanism. 

Combining these suction and discharge principles results in a powerful self-priming positive displacement action.

Proportional dosing

The perfect seal between the two sides of the pump means that there is no product slip, when coupled with the pump’s linear speed-flow characteristic, it makes peristaltic pumps ideal for dosing.

No cross-contamination

The liquid being pumped never comes into contact with any moving parts because it is totally contained within the reinforced hose or tube. Additionally, as the pumped liquid is totally contained within the hose or tube, this makes a peristaltic pump a hygienic pumping solution with zero chance for contamination. This also reduces maintenance time as the hose or tube is the only wearing part.

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Why Verderflex peristaltic hose and tube pumps?

Verderflex pumps stand apart from their competitors with their reliable build quality and performance in some of the world's toughest environments.

Verder invest significant resources in engineering, building and testing its products which results in better components and assemblies, efficiencies, performance and advanced functions. For example, the hose is the most important feature of any hose pump and Verderflex has designed its hose to be the longest lasting in the market, capable of withstanding corrosive and abrasive applications. The Verderflex hose can also be used in many other peristaltic pumps on the market. (For more information visit the hose page.)

A peristaltic pump for all applications

Offering a complete range of peristaltic pumps, the Verderflex brand can meet the demands of industrial, commercial and scientific processes.

The Dura and VF hose pumps reliably pump the toughest fluids and are often found pumping slurry with high solid content from the mining industry, ad and bio gas and sewage facilities where there are highly abrasive, gritty and viscous fluids.

A range of tube materials are available to handle a range of different chemicals as well as hygienic options for food and beverage dispensing. These are used in Original Equipment Manufacture as custom solutions that can be incorporated wherever accurate dosing is required such as in vending machines.

The Smart and Scientific models are easily programmable tube pumps and ideal for use with chemicals or in a laboratory setting. This range is complimented by the industrial tube pump range. Specifically designed to be used in hazardous areas, they provide a compact pumping solution for automated systems as standalone pumps or as part of Original Equipment Manufacture. These pumps have multiple power options and quick and easy tube change features.