A liquid ring vacuum pump is easy to operate and is utilized in several applications across various industries. A liquid ring pump works together with a sealant required in its procedure. This liquid can be water, oil or any various 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 produced by the rotating impeller. This power holds the liquid ring 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 into the liquid ring decreases and boosts as the impeller rotates. This creates increasing cell volume on the inlet port side, creating vacuum.

On the discharge slot side, the impeller cell volume decreases as the blades move further into the liquid band. This increases the pressure until discharge occurs through the discharge port.

A continuous flow of new sealing liquid is supplied to the pump via the sealing-liquid inlet.

Regarding the two-stage liquid band pump, the discharge from the initial stage will not discharge to atmosphere. Rather, the 1st stage discharges through the manifold leading to the second stage along with through a discharge port situated in the Liquid-Ring Vacuum Pump china intermediate plate between the first- and second-stage impellers.