Water Vacuum Pump liquid Band 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 starts to rotate, the liquid can be starts move outward by centrifugal drive.
Water band vacuum pump is a common type of liquid ring vacuum pump. Water ring 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 band concentric with the pump shell. The liquid band and the rotor blade form a rotating variable capability vacuum pump with periodic volume change. When the functioning liquid is water, it is called water Band vacuum pump. There are many kinds of water band vacuum pumps 
with different prices. .Among them, 2BV is more cost-effective. The type selection of water band vacuum pump ought to be based on your on-site procedure, the required vacuum degree and the amount of air pumping required.