A Liquid-Ring Vacuum Pump china liquid ring vacuum pump is easy to operate and is 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, oil or any other solvent which is 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 push 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 entry of the blades into the liquid ring reduces and raises as the impeller rotates. This creates increasing cell volume on the inlet interface side, creating vacuum.

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

A continuing flow of fresh sealing liquid comes to the pump via the sealing-liquid inlet.

In the case of the two-stage liquid ring pump, the discharge from the first stage does not discharge to atmosphere. Instead, the initial stage discharges through the manifold leading to the second stage in addition to through a discharge interface positioned in the intermediate plate between the first- and second-stage impellers.