Micro vacuum pump or micro air pump after a long time of use,vacuum,flow has decreased, or even no vacuum.It should be the accumulation of dust in the pump chamber.Someone drew 1 ml of water with a pump, trying to flush the dust out of the pump chamber.
The pump is repaired, disassembled, dried all components, reassembled, and all is back to normal.This shows, miniature vacuum pump, miniature air pump can not have water to enter the pump, otherwise the vacuum degree and flow will be greatly reduced, the appearance of suction is very weak, it is often said not to vacuum.
Such as our vacuum pump SC3704PM,SC5002PM,SC3402PM etc, these are not allow liquid water into the pump, which should be paid special attention in teh process of use.