The hose of the peristaltic pump is the main working part of the peristaltic pump and an important consumable material. Its performance directly affects the accuracy and stability of the flow rate of the peristaltic pump.As a consumable material, the hose has a certain service life and needs to be replaced regularly.

There are many factors that affect the service life of the peristaltic pump hose. The main factors include the operating speed of the pump head, the material of the hose, and the pressure pipe gap between the pump head roller and the arc.

Hose damage is mainly manifested as fatigue damage.Therefore, the operating speed of the pump head has a great impact on the service life of the hose.For example, if the operating speed of the pump head is 600rpm, if the actual test life of the hose is 200 hours, when the operating speed of the pump head drops to 300rpm, the operating life of the hose can reach at least 400 hours.Therefore, when choosing a peristaltic pump, a pump head with a large flow rate should be selected as much as possible in order to achieve the required flow value at a lower speed and maximize the service life of the hose.

The material of the hose also has a great impact on the service life of the hose.Different hose materials have great differences in service life under the same operating conditions.Domestic hoses are generally food-grade silicone hoses, and the general calibration service life is 200 hours (continuous operation at 600rpm); 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.Whether to use imported hoses needs to be determined according to actual usage.It should also be noted that not all imported hoses have a long service life.The service life of the inlet pipe of some materials may be much shorter than that of domestic hoses, and it is only suitable for certain special occasions.

Let's talk about the influence of the pressure pipe gap between the roller of the peristaltic pump head and the arc on the life of the hose.Rongbai Company conducted a comparative experiment in this regard, increasing the pressure of one of the pump heads to 0.3 MPa, and the pressure of the other pump head to 0.15mpa.Therefore, in the case of 600rpm, the hose life of the pump head with a pressure of 0.15mpa is 280 hours, while the hose life of the pump head with a pressure of 0.3 mpa is only 50 hours.Therefore, it can be concluded that the pressure pipe gap has a great impact on the life of the hose.Since the damage to the hose is mainly manifested as fatigue damage, the gap between the pressure pipe is small, and the greater the degree of extrusion of the pump head on the hose, the more prone the hose is to fatigue damage.Of course, the greater the outlet pressure of the pump head.Rongbai's peristaltic pump head has an adjustable pressure function, which can adjust the appropriate outlet pressure according to different occasions.

In addition to the size of the pressure pipe gap, the factors that affect the service life of the peristaltic pump hose should also consider the uniformity of the pressure pipe gap.For example, whether the arc curve is uniform, the machining error of the roller and the roulette 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 0.3 MPa and 0.15MPa respectively.Although the pressure value is twice the original, the gap between the pressure pipes is less than 0.3mm. Therefore, small size errors or assembly errors will seriously reduce the service life of the hose.This is because, if the gap between the pressure pipes is uneven, in order to ensure the air tightness of the pump head, the position of the minimum pressure will not leak, so the pressure in other places will be too large (the gap is less than the normal value), which will reduce the local service life of the hose.