A liquid ring vacuum pump is easy to operate and can be used in a number of applications across various industries. A liquid ring pump works together with a sealant required in its procedure. This liquid can be water, essential oil or any various other solvent which is 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 power holds the liquid band against the inner wall structure of the Liquid-Ring Vacuum Pump china pumping chamber. Because the impeller is located eccentric to the pumping chamber, the depth of entry of the blades into the liquid ring decreases and boosts as the impeller rotates. This creates increasing cell quantity on the inlet slot side, creating vacuum.
On the 
discharge interface side, the impeller cell volume decreases as the blades move further in to the liquid band. This escalates the pressure until discharge takes place through the discharge interface.
A continuing flow of refreshing sealing liquid comes to the pump via the sealing-liquid inlet.
Regarding the two-stage liquid band pump, the discharge from the initial stage does not discharge to atmosphere. Rather, the initial stage discharges through the manifold leading to the second stage as well as through a discharge interface located in the intermediate plate between the first- and second-stage impellers.