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When the peristaltic pump is used normally, the output flow of the peristaltic pump is very unstable, and some intuitive reasons such as pump head, pump tube, driver, etc. are excluded. In addition, there is another reason that is easily overlooked by everyone, which is When the peristaltic pump transmits liquid, the influence of the liquid viscosity, head, and liquid properties on the flow rate of the peristaltic pump.
Effect of Liquid Viscosity on peristaltic pumps
The viscosity of the liquid fluid is a detail that is easy to ignore when selecting a type of peristalsis. Generally, when customers consult our products, we will ask, what kind of liquid is it? Strong acid and strong alkali, liquid viscosity, the original intention of our asking these questions are that when the viscosity of the liquid reaches a certain value, the pumping efficiency will be reduced due to the limited suction capacity of the hose. At the same pump speed, the flow rate of the viscous liquid will be smaller than that of pumping water. The higher the viscosity, the more the flow will be reduced.
The effect of the length of the pump tube on the peristaltic pump
The peristaltic pump not only has the ability to transmit liquid but also has the ability of self-priming. In theory, under the same atmospheric pressure, the maximum suction stroke of transmission can reach about 10M, but in practice, the flow rate of the peristaltic pump will be attenuated, and the suction stroke For each additional meter, the flow of the peristaltic pump will be attenuated by about 15%. If there is a high demand for the suction stroke, you can choose a hose with a thinner inner diameter and a thicker wall, and choose a driver with a higher speed.
Influence of pump tube material on peristaltic pump
The service life of hoses of different materials and specifications will also be different, and it is necessary to choose a hose suitable for the service life according to the usage. Compared with the domestic silicone tube, the PharmedBPT tube has a longer life and better airtightness. For example, when doing anaerobic bacteria culture experiments, the airtightness of the pump tube is very important to prevent the outside oxygen from entering the culture bacteria through the pipeline.
In addition, the imported pump tube is superior to the domestic silicone tube in terms of chemical compatibility and lifespan, and the hardness will also be higher. Therefore, when choosing the pump tube and driver selection, also consider the effect of pump tube hardness on the driver. If the selected driver torque is too low, it is possible to press the inlet pump tube.
Effect of Liquid Viscosity on peristaltic pumps
The viscosity of the liquid fluid is a detail that is easy to ignore when selecting a type of peristalsis. Generally, when customers consult our products, we will ask, what kind of liquid is it? Strong acid and strong alkali, liquid viscosity, the original intention of our asking these questions are that when the viscosity of the liquid reaches a certain value, the pumping efficiency will be reduced due to the limited suction capacity of the hose. At the same pump speed, the flow rate of the viscous liquid will be smaller than that of pumping water. The higher the viscosity, the more the flow will be reduced.
The effect of the length of the pump tube on the peristaltic pump
The peristaltic pump not only has the ability to transmit liquid but also has the ability of self-priming. In theory, under the same atmospheric pressure, the maximum suction stroke of transmission can reach about 10M, but in practice, the flow rate of the peristaltic pump will be attenuated, and the suction stroke For each additional meter, the flow of the peristaltic pump will be attenuated by about 15%. If there is a high demand for the suction stroke, you can choose a hose with a thinner inner diameter and a thicker wall, and choose a driver with a higher speed.
Influence of pump tube material on peristaltic pump
The service life of hoses of different materials and specifications will also be different, and it is necessary to choose a hose suitable for the service life according to the usage. Compared with the domestic silicone tube, the PharmedBPT tube has a longer life and better airtightness. For example, when doing anaerobic bacteria culture experiments, the airtightness of the pump tube is very important to prevent the outside oxygen from entering the culture bacteria through the pipeline.
In addition, the imported pump tube is superior to the domestic silicone tube in terms of chemical compatibility and lifespan, and the hardness will also be higher. Therefore, when choosing the pump tube and driver selection, also consider the effect of pump tube hardness on the driver. If the selected driver torque is too low, it is possible to press the inlet pump tube.
