Liquid-Ring Vacuum Pump

A liquid ring vacuum pump is easy to operate and is used in several applications across various industries. A liquid ring pump works together with a sealant required in its operation. This liquid could be water, oil or any additional solvent which is usually 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 drive holds the liquid band against the inner wall of the pumping chamber. Because the impeller is situated eccentric to the pumping chamber, the depth of entry of the blades in to the liquid ring reduces and raises as the impeller rotates. This creates increasing cell volume on the inlet port side, creating vacuum.

On the discharge interface side, the impeller cell volume decreases as the blades move Liquid-Ring Vacuum Pump china further in to the liquid ring. This escalates the pressure until discharge takes place through the discharge interface.

A continuous flow of new 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 will not discharge to atmosphere. Rather, the first stage discharges through the manifold resulting in the second stage in addition to through a discharge port positioned in the intermediate plate between the first- and second-stage impellers.