Liquid Band Vacuum Pump Working Basic principle. The vacuum pump consisting an impeller which is located eccentric to 
the cylinder body(Vacuum pump housing). Vacuum is created in the vacuum pump by using a liquid seal. … When the impeller starts to rotate, the liquid can be begins move outward by centrifugal pressure.
Water band vacuum pump is a common type of liquid ring vacuum pump. Water band is a rotor with Water Vacuum Pump multi-blades eccentrically installed in the pump shell. When it rotates, it throws liquid in to the pump and forms a liquid band concentric with the pump shell. The liquid ring and the rotor blade type a rotating variable capability vacuum pump with periodic volume change. When the operating liquid is drinking water, it is called water Band vacuum pump. There are many kinds of water band vacuum pumps with different prices. .Included in this, 2BV is more cost-effective. The type selection of water band vacuum pump should be based on your on-site process, the required vacuum degree and the quantity of air pumping required.