The principle accuracy of peristaltic pump is far from that of injection pump. That is because there are many factors that can affect the precision of peristaltic pump. The peristaltic pump depends on the flexibility of the hose to work continuously. This is also one of the reasons why the sanitary level is relatively high among all pump types. Because of the good self-sealing property of peristaltic pump itself, more and more filling machines begin to use peristaltic pump as the filling unit, The main reasons and solutions for the influence of peristaltic pump on transmission accuracy in practical work

It is not difficult to find that the liquid transmitted by the peristaltic pump is section by section, and the total amount of liquid transmitted by each section is equal, which is suitable for filling and continuous transmission, and the accuracy can be guaranteed. However, with the passage of time, the cross section of a new hose is circular. When squeezed on the peristaltic pump for a few minutes, the cross-sectional area of the hose will become elliptical, and the flow rate of the new pipe will decay relatively quickly at the beginning, It will gradually slow down until the hose breaks.

There are three main reasons that can affect the precision of the peristaltic pump: 1. The elastic characteristics of the peristaltic pump 2. The dimensional accuracy of the pump head 3. The change of the transmission fluid. In fact, these are not difficult to understand. The elastic characteristics of the hose itself are determined by two aspects, one is the problem of material, the other is the problem of the size of the hose, and the dimensional accuracy of the pump head is mainly due to the small gap between the roller and the arc, or the uneven gap, It will cause the hose to be over-extruded locally, causing plastic deformation of the hose, causing dramatic changes in the elasticity of the hose, thus affecting the transmission accuracy. As for the change of the transmission liquid, the hose is an elastic plastic body, and different temperatures will make its elasticity change. Generally speaking, the higher the temperature, the worse the elasticity of the hose

In view of the above problems, it is necessary to select flexible hose with high elastic material and reasonable size, select high quality peristaltic pump head, and pay attention to the uniformity and temperature of the transmission liquid. In conventional transmission, that is, where the accuracy is not very high, some problems can be ignored.