A liquid band vacuum pump is simple to operate and can be used in several applications across various Liquid-Ring Vacuum Pump china industries. A liquid band pump works with a sealant required in its procedure. This liquid could be water, oil or any various other solvent which is certainly rotated by an impeller within the casing of the pump.
As the shaft turns, a liquid ring is created by the 
centrifugal force produced by the rotating impeller. This force holds the liquid band against the inner wall structure of the pumping chamber. Since the impeller is located eccentric to the pumping chamber, the depth of entry of the blades in to the liquid ring reduces and improves as the impeller rotates. This creates increasing cellular quantity on the inlet port side, creating vacuum.
On the discharge interface side, the impeller cell volume decreases as the blades move further in to the liquid band. This increases the pressure until discharge takes place through the discharge slot.
A continuous flow of new sealing liquid is supplied to the pump via the sealing-liquid inlet.
In the case of the two-stage liquid ring pump, the discharge from the initial stage does not discharge to atmosphere. Rather, the first stage discharges through the manifold leading to the second stage in addition to through a discharge interface situated in the intermediate plate between the first- and second-stage impellers.