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What is peristaltic pump?
Peristaltic pumps are one of the fastest growing types of positive displacement pumps on the market. However, many people are not yet familiar with the technical principles of this pump and their advantages. Peristaltic pumps are also called pump tube pumps. In the past, almost all of this pump was used in the laboratory. However, after redesigning, the pump's flow rate and pressure have been increased. Now, a large number of peristaltic pumps have been successfully used in chemical process control and production areas. The popularity of peristaltic pumps can be attributed to their design. The design uses a motor to drive a set of rollers to rotate. Rolls have been run over the soft pump tube, its repeated compression and release. This squeezing creates a vacuum that draws the fluid through the pump tubing to complete the pumping process. Because only the pump tube is a water-passing component, this pump is easy to maintain and clean. This design offers several benefits that make the peristaltic pump suitable for a variety of complex and difficult applications. One of the biggest advantages is: â—† pollution-free â—† easy to operate â—† less maintenance â—† self-priming â—† can use a variety of tubing materials â—† gentle pumping process â—† can pump liquid, gas, multi-phase mixture and viscous fluid High Operating Benefit [How Peristaltic Pumps Work]: Pump fluid by alternately squeezing and releasing the pump's flexible delivery hose. Like squeezing a hose with two fingers, a negative pressure builds up inside the tube as the fingers move, and fluid flows in. The peristaltic pump creates a "pillow" of fluid in the tubing between the two rollers. The size of the pillow depends on the inner diameter of the tubing and the geometry of the rotor. The flow rate depends on the product of the speed of the pump head and the size of the "pillow" and the number of "sleepers" produced per revolution of the rotor. The size of the pillow is generally constant (except when pumping particularly viscous fluids). Pumps with a larger "pillow" volume, when compared to pumps with the same rotor diameter, have larger volumes of fluid delivered per revolution of the rotor but also greater pulsations. This is similar to the case of a membrane valve. A smaller "pillow" volume pump, on the other hand, delivers less volume of fluid per revolution of the rotor; moreover, a small, "pillow" that is formed quickly and continuously produces a smoother fluid flow. This is the case with gear pumps. [Advantages of a peristaltic pump] Equipped with a two-way equal flow delivery capacity; No liquid will be able to cause damage to any part of the pump without air running; A vacuum of up to 98%; No valve, mechanical seal and packing seal, There is no leakage and maintenance of these factors; can easily transport solid, liquid or gas-liquid mixed phase fluid, allowing solids contained in the fluid diameter of tubular elements within 40%; can deliver a variety of abrasive, corrosion, oxygen-sensitive properties Of the material and all kinds of food, etc .; only the hose is the need to replace the parts, the replacement operation is extremely simple; except for the hose, the product delivered is not in contact with any parts. Limitations of Peristaltic Pumps 1. Pressure Limitations: With flexible tubing, the pressure to be applied is limited. 2. A pulsating flow is generated by the pump during operation. The solution is: use pulse suppressor pulse suppressor is a simple positioning vessel, the working principle is because the air is more compressible than the liquid, the pulse flow into the container, the liquid on the air bag sag to absorb the pulse and then smooth out the pulse suppression Peristaltic pump application areas: chemical industry; mining, metallurgical industry; paper industry; paint coatings industry; food industry; ceramic industry; oil industry; water treatment industry; pump system selection 1. Select the tube 2. Select the pump head 3. Select the drive