Peristaltic pump (Peristaltic Pump), also known as hose pump, is a new type of industrial pump. It is a product of modern industrial development. It is widely used in pharmaceutical, food, chemical and other industries. It transports some sensitive and viscous , Strong corrosive, grinding, high purity, and medium containing certain granular materials.
The hose is the only liquid-receiving element of the peristaltic pump. The pump works by squeezing the hose through a roller or a pressing block. This means that the pump can be dry-run, self-priming, and handle high-viscosity, highly abrasive media. In addition, as an independent unit, the hose does not need to be sealed, so it is completely leak-free and very hygienic. And each rotation will output a fixed flow rate, which makes the peristaltic pump quantitative feeding application outstanding performance. This principle can be applied to all peristaltic pumps, then the pump head and drive part are the most important factors that distinguish the quality of the peristaltic pump.
The principle and concept of the peristaltic pump, that is, the hose pump, is like the repeated contraction and relaxation of muscles to make blood flow in the blood vessels. The peristaltic pump relies on several rollers to squeeze / release alternately along an elastic tube. Come to work. The squeezed fluid in the tube produces a flow output. When the pressure disappears and the tube returns to its original state by its own elasticity, the volume increases, a vacuum is generated, and the fluid is sucked. Such continuous action is the working principle of the peristaltic pump.
Working principle of the peristaltic pump The peristaltic pump pumps fluid by alternately squeezing and releasing the elastic delivery hose of the pump. Just like squeezing the hose with two fingers, as the finger moves, a negative pressure is formed in the tube, and the liquid flows. The peristaltic pump is a section of pump tube between two rotating rollers to form a "pillow" shaped fluid. The volume of the "pillow" depends on the inner diameter of the pump tube and the geometric characteristics of the rotor. The flow rate depends on the product of the three parameters of the speed of the pump head and the size of the "pillow" and the number of "pillows" produced per revolution of the rotor. The size of the "pillow" is generally constant (except when pumping particularly viscous fluids). Comparing pumps with the same rotor diameter to a pump that produces a larger "pillow" volume, the volume of fluid delivered per revolution of the rotor is also larger, but the degree of pulsation generated is also larger. This is similar to the case of membrane valves. For a pump that produces a smaller "pillow" volume, the volume of fluid delivered by each rotor revolution is also smaller; moreover, a small "pillow" formed quickly and continuously makes the fluid flow more stable. This is similar to the case of gear pumps.
With two-way equal flow delivery capacity; no liquid will cause damage to any parts of the pump; it can produce up to 98% vacuum; there is no valve, mechanical seal and packing seal device, so there is no leakage and maintenance Factors; can easily transport solid, liquid or gas-liquid mixed phase fluids, allowing the diameter of the solids contained in the fluid to reach 40% of the inner diameter of the tubular element; can transport various materials with abrasive, corrosive, oxygen-sensitive properties and various food ; Only the hose is a component that needs to be replaced, and the replacement operation is extremely simple; except for the hose, the product being conveyed does not contact any components.
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