Liquid Ring Water Vacuum Pump Vacuum Pump Working Theory. The vacuum pump consisting an impeller which is situated eccentric to the cylinder body(Vacuum pump housing). Vacuum is established in the vacuum pump by using a liquid seal. … When the impeller starts to rotate, the liquid is definitely begins move outward by centrifugal drive.
Water ring vacuum pump is a common type of liquid ring vacuum pump. Water ring is usually a rotor with multi-blades eccentrically set up in the pump shell. When it rotates, it throws liquid into the pump and forms a liquid ring 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 drinking water Band 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 ought to be based on your on-site process, the required vacuum level and the quantity of air pumping required.