Liquid Ring Vacuum Pump Working Basic principle. The vacuum pump consisting an impeller which is located eccentric to the cylinder body(Vacuum pump casing). Vacuum is established in the vacuum pump by using a liquid seal. … When the impeller begins to rotate, the liquid is certainly starts move outward by centrifugal drive.
Water band vacuum pump is a common type of liquid ring vacuum pump. Water band is a rotor with multi-blades eccentrically set up in the pump shell. When it rotates, it throws liquid in to the pump and forms a liquid ring concentric with the pump shell. The liquid ring and the rotor blade form a rotating variable capacity vacuum pump with periodic volume change. When the working liquid is water, it is called drinking water Ring 
vacuum pump. There are plenty of kinds of water ring 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 Water Vacuum Pump amount of air pumping required.