Six Questions & Answers About Hose Pumps

How do hose pumps work?

Hose pumps work on the peristalsis principle. This principle is based on the squeezing movement of a flexible hose, which is periodically compressed by a rotor or roller mechanism. At the beginning of the pumping process, the hose is wholly or partially filled with the liquid to be pumped. The hose can be filled with fluid by gravity or with the help of back suction. As the rotor or rollers of the pump mechanism rotate, they move over the flexible hose. This movement periodically compresses the hose. The squeezing movement of the hose causes the liquid to be pushed forward. The pressure created by the squeezing moves the fluid towards the pump outlet. After the rotor or rollers have passed the hose in a squeezing motion, the hose relaxes again, drawing in liquid for the next pumping cycle. This process is repeated continuously, ensuring the fluid is pumped evenly and with slight pulsation.

What are hose pumps used for?

Hose pumps are used in various branches of industry, especially where precise and gentle pumping of liquids with a high solids content is required. You can use hose pumps in the chemical industry to convey various chemicals safely and precisely. Due to their ability to handle sensitive media, you benefit particularly when dosing chemicals in laboratories and industrial processes. Another area of application for hose pumps is food processing. You can use hose pumps to dose ingredients such as flavourings or colourings in this case. Due to their design, they offer you the highest level of hygiene and avoid contamination. This is why they are often used to dose medicines precisely in pharmaceutical applications. Their ability to deliver continuously and with low pulsation makes them particularly suitable for producing medicines. The requirements in the environmental sector are completely different. Due to their robust design, hose pumps are ideal for sampling water, adding chemicals for water treatment, or pumping sludge and wastewater. You can also use hose pumps for dosing chemicals in water and wastewater treatment plants to adjust pH values or add disinfectants. In laboratories, analytical instruments such as chromatographs often use hose pumps to dose solvents or reagents precisely. Here, you benefit from the high dosing accuracy. The deviation is less than one percent.

What are the advantages of hose pumps?

In addition to their versatility, hose pumps offer a range of advantages. They pump liquids very gently, as the fluid only comes into contact with the flexible hose. This makes them particularly suitable for sensitive media, such as in the pharmaceutical or biotechnology industries. Using hose pumps, you also benefit from the fact that they are self-priming and insensitive to dry running. This is particularly useful in applications where the pump is not constantly filled with liquid. The squeezing mechanism of the hose pump generates a uniform and pulsation-free flow. This enables a constant fluid flow, as required in analytical chemistry. Another decisive advantage of hose pumps is that the hose is the only wearing part. This simplifies maintenance and cleaning enormously for you. The hose can be replaced quickly and easily without dismantling the entire pump. This minimises your downtime and service times while saving you money simultaneously. Furthermore, using peristaltic pumps minimises the risk of contamination from other pump components, as the liquid to be pumped only comes into contact with the hose. Due to the closed system and limited moving parts, there is also a lower risk of leaks than other pump types. Another advantage of hose pumps is high capacity. The robust design of hose pumps makes them suitable for pumping even abrasive and aggressive media such as sludge, ceramic slurry or mortar. Another decisive advantage of hose pumps is their low energy consumption. The large rollers reduce your energy consumption by up to 30 percent and ensure a long service life for the hose. All in all, these advantages make hose pumps an attractive option in many industrial applications.