A liquid band vacuum pump is easy to operate and is used in several applications across various industries. A liquid ring pump works with a sealant necessary in its procedure. This liquid could be water, oil or any various other solvent which can be rotated by an Liquid-Ring Vacuum Pump china impeller within the casing of the pump.
As the shaft turns, a liquid band is created by the centrifugal force 
generated by the rotating impeller. This drive holds the liquid ring against the inner wall structure of the pumping chamber. Because the impeller is located eccentric to the pumping chamber, the depth of entry of the blades in to the liquid ring decreases and increases as the impeller rotates. This creates increasing cell volume on the inlet slot side, creating vacuum.
On the discharge port side, the impeller cell volume decreases as the blades move further into the liquid band. This escalates the pressure until discharge takes place through the discharge slot.
A continuing flow of fresh sealing liquid comes to the pump via the sealing-liquid inlet.
In the case of the two-stage liquid band pump, the discharge from the initial stage does not discharge to atmosphere. Instead, the first stage discharges through the manifold resulting in the second stage and also through a discharge port positioned in the intermediate plate between the first- and second-stage impellers.