Analysis of peristaltic pump pressure range design principle

Peristaltic pump pressure is determined by the tube gap, which is why the same type of peristaltic pump hose wall thickness are the same, the diameter and diameter of the size is not critical, as long as the wall The same thickness (wheel long enough) to use the same pump head. However, the peristaltic pump can generally reach the pressure? To understand this problem, we must first understand how the peristaltic pump is under pressure. Peristaltic pump is squeezed by the roller hose to deliver liquid, in order to prevent the liquid backflow, must always maintain airtight, with a corresponding seal will have a certain pressure. Furthermore, the size of the peristaltic pump pressure is what is the relationship with it? Is the pressure with the tube pressure is related to the more pressure tube, the pressure is smaller, the longer hose life, loose to not seal when there is no pressure The contrary, the more tight pressure tube, the greater the pressure, to a certain extent, the hose will have a relatively large tube fatigue wear and tear, hose life will be short. Another problem is that the peristaltic pump pressure is dependent on the tube gap to determine the use of hoses are basically the same, but if the same is 2.4mm wall thickness of the hose, manufacturers and manufacturers, the hose must exist Some error, even with the same manufacturer's hose, there will be ± 0.1mm error, and for peristaltic pump pressure, the error of 0.1mm is sufficient to cause a large pressure difference, that is to say in the pressure Under certain tube gap conditions, the hose will be different, the pressure will be different, and accordingly, the hose life will be different. In practice, excellent peristaltic pump design will be equipped with pressure regulating function to adapt to different manufacturers, domestic and imported pump tube size differences between. This function is crucial for pumps with a wall thickness of less than 2.4 mm because small errors can cause large pressure drops. Another function of this application is that it can be used in situations where different pressures are needed and pressure adjustments can be made. Of course, the pressure range here is within the permissible range of peristaltic pumps. Applicable wall thickness of 2.4mm and below the peristaltic pump pressure range is about 0-0.25Mpa; applicable wall thickness 4.8mm and above peristaltic pump pressure range is about 0-0 .6 Mpa. The main factor that affects peristaltic pump pressure is the hose wall thickness, the thicker the wall thickness, the greater the pressure bearing capacity of the hose, the greater the pressure that can be achieved. If the pressure required by the customer is greater than 0.6Mpa, peristaltic pump is not recommended. The main advantage of peristaltic pump is hygienic, no cross-contamination, but not as good as plunger pump and gear pump in dealing with very large pressure. The plunger A pump is the type of pump that can achieve the highest pressure in all pumps. (Editor: Zhuang Ling)

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