A liquid band vacuum pump is easy to operate and is utilized in a number of applications across various industries. A liquid band pump works together with a sealant required in its Liquid-Ring Vacuum Pump china operation. This liquid could be water, essential oil or any various other solvent which is usually rotated by an impeller within the casing of the pump.
As the shaft turns, a liquid band is established by the centrifugal force produced by the rotating impeller. This push holds the liquid band against the inner wall structure of the pumping chamber. Since the impeller is situated eccentric to the pumping chamber, the depth of access of the blades into the liquid ring decreases and raises as the impeller rotates. This creates increasing cellular volume on the inlet port side, creating vacuum.
On the discharge port side, the impeller cell volume decreases as the blades move further in to the liquid ring. This increases the pressure until discharge takes place through the discharge slot.
A continuous flow of new 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 1st stage will not discharge to atmosphere. Instead, the initial stage discharges through the manifold resulting in the second stage 
and also through a discharge slot positioned in the intermediate plate between your first- and second-stage impellers.