Air proportion is far less than the transmission medium, does not exhaust irrigation cannot make the impeller drives the medium produces centrifugal force so as to achieve pumping. If the pump body with air is not up to the rated pressure, not pumping, will slip, lost the function of pumping.
The theoretical basis of the exhaust is "gas" phenomenon, if the position of the multi-stage pump is lower than the liquid level in the tank, no need to pump. Pump position below the trough of the words, the media in the role of gravity will certainly flow into the pump body, of course, do not pump, these are external factors, to really solve the problem, from the pump itself.
