1. Water along the flow direction of the centrifugal pump is along the impeller axial suction, perpendicular to the axial flow out, that is, the direction of the flow of water into 90 degrees.
2. Due to the centrifugal pump impeller inlet by forming a vacuum absorption, so before starting must phase water pump and tube filling water or vacuum pump for pumping gas, to discharge the air to form a vacuum, and pump shell and the water pipe must be strictly seal, no leakage, otherwise do not come true empty, also on the suction Sheung Shui.
3. The impeller inlet cannot form absolute vacuum, so centrifugal pump suction height can not be over 10 meters, and flow through the water suction pipe to bring losses along the way, actually allow installation height (axis pump from the suction surface height) is far less than 10 meters. If the installation is too high, it does not absorb water; in addition, because of the low atmospheric pressure in the mountains than the plain, so the same water pump in the mountains, especially in the high mountain area, the installation height should be reduced, otherwise it can not suck water.
