Why is the peristaltic pump slow?

Question

Electronics

I bought this pump ru.aliexpress.com/item/1PC-6V-Peristaltic-Pump-Dos...
However, instead of the declared 100 ml / min, I have only 20. what could be the matter?

Answer 1

If we assume that you soaked the tubes to restore working elasticity as indicated in the description, then the reason may be in a different density / viscosity of the working fluid. Due to the low power of the motor, alcohol and glycerin will be pumped in different volumes. Also consider the length of the tubes. This also greatly affects the hydrodynamic resistance of the system and its performance. Good luck.

Answer 2

The fact is that you bought on Ali.
In general, here you, of course, will be given a qualified answer. Complain to the seller, open a dispute. Submit tests showing a discrepancy of 5 times with the declared technical characteristics.
You are an adult, aren't you?