A liquid ring vacuum pump is simple to operate and is utilized in several applications across various industries. A liquid ring pump works with a sealant needed in its procedure. This liquid can be water, oil or any other solvent which can be rotated by an 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 of the pumping chamber. Because the impeller is located eccentric to the pumping chamber, the depth of access of the blades into the liquid ring decreases and increases as the impeller rotates. This creates increasing cell quantity on the inlet interface side, creating vacuum.
On the discharge interface 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 port.
A continuous flow of clean sealing liquid is supplied to the pump via the sealing-liquid inlet.
Liquid-Ring Vacuum Pump china Regarding the two-stage liquid band pump, the discharge from the first stage will not discharge to atmosphere. Instead, the 1st stage discharges through the manifold resulting in the second stage as well as through a discharge port located in the intermediate plate between your first- and second-stage impellers.