Introduction to the factors affecting the life of peristaltic pump hose

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The peristaltic pump hose is the main working component of the peristaltic pump, and its performance directly affects the accuracy and stability of the peristaltic pump flow. As a flexible moving part, the hose is a part that has a certain service life and needs to be replaced regularly.
There are many factors that affect the life of a peristaltic pump hose. The main factors are the running speed of the pump head, the material of the hose, and the pressure tube gap between the pump head roller and the arc.
The damage of the hose is mainly caused by fatigue damage. Therefore, the operating speed of the pump head has a very large effect on the life of the hose. For example, if the pump head is running at 600 rpm, if the actual test life of the hose is 200 hours, then the operating life of the pump head can be reduced to 300 rpm, and the hose can have a service life of at least 400 hours. Therefore, when selecting a peristaltic pump, the pump head with a large flow rate should be selected as much as possible, so that the required flow rate can be achieved at a lower speed, and the service life of the hose can be extended to a large extent.
The material of the hose has a very large effect on the life of the hose. Different hose materials have a very long life span under the same operating conditions. Domestically produced hoses are generally food grade silicone hoses with a universally calibrated life of 200 hours (uninterrupted operation at 600 rpm); under the same conditions, imported long-life hoses can easily reach more than 1200 hours. Of course, the price of imported hoses will be much higher than that of domestic hoses. It is necessary to determine whether or not to use imported hoses according to actual use. It should also be noted that not all imported hoses have a long service life. The inlet life of some materials may be much shorter than that of domestic hoses, and it is only suitable for some special occasions.
Let's talk about the effect of the pressure tube gap between the roller head and the arc of the peristaltic pump on the life of the hose. Inon has conducted a comparative experiment in this area, which has raised the pressure of one of the pump heads to 0.3Mpa and the other pump head pressure to 0.15Mpa. As a result, the hose life of the pump head at 600 rpm with a pressure of 0.15Mpa is 280. Hours, while the 0.3Mpa pump head has a hose life of only 50 hours. It follows that the effect of the pressure tube gap on the life of the hose is very large. Because the damage of the hose is mainly caused by fatigue damage, the pressure gap is small, the pump head is squeezed to the hose, and the hose is more likely to be fatigue-damaged. Of course, the outlet pressure of the pump head is larger. . Qi Li's peristaltic pump heads are pressure-adjustable, which can adjust the appropriate outlet pressure according to different occasions to achieve a balance between pressure and life.
Factors affecting the life of the peristaltic pump hose, in addition to the size of the pressure tube gap, also consider the uniformity of the pressure tube gap. For example, whether the curve of the arc is uniform, the processing error of the roller and the wheel, and the assembly error of the center of the roller and the center of the arc. The above example is to adjust the pump head to 0.3Mpa and 0.15Mpa respectively. Although the pressure difference is doubled, the pressure tube gap is only less than 0.3mm, so the small dimensional error or assembly error will be seriously reduced. The service life of the hose. This is because if the pressure tube gap is not uniform, in order to ensure the airtightness of the pump head, the position of the small pressure at the zui will not be leaked, so that the rest will be over-pressure (the gap is smaller than the normal value). Will reduce the local life of the hose.

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