Liquid Band Vacuum Pump Working Theory. 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 usually starts move outward by centrifugal drive.
Water band vacuum pump is a common kind of liquid ring vacuum pump. Water ring is usually a rotor with multi-blades eccentrically installed 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 form a rotating variable capability vacuum pump with periodic volume change. When the working liquid is water, it is called water Ring vacuum pump. There are many kinds of water band vacuum pumps with different prices. .Among them, 2BV is more cost-effective. The sort selection of water band vacuum pump should be based on 
your Water Vacuum Pump on-site procedure, the required vacuum degree and the amount of air pumping required.