Liquid Ring Water Vacuum Pump Vacuum Pump Working Principle. The vacuum pump consisting an impeller which is situated eccentric to the cylinder body(Vacuum pump housing). Vacuum is created in 
the vacuum pump by utilizing a liquid seal. … When the impeller begins to rotate, the liquid is starts move outward by centrifugal drive.
Water band vacuum pump is a common type of liquid band vacuum pump. Water band is definitely 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 band concentric with the pump shell. The liquid ring and the rotor blade type a rotating variable capacity vacuum pump with periodic volume change. When the working liquid is drinking water, it is called water Band vacuum pump. There are several kinds of water band vacuum pumps with different prices. .Included in this, 2BV is more cost-effective. The sort selection of water band vacuum pump should be predicated on your on-site procedure, the required vacuum level and the quantity of air pumping required.