Liquid-Ring Vacuum Pump

A liquid ring vacuum pump is simple to operate and can be used in a number of applications across various industries. A liquid ring pump works with a sealant required in its operation. This liquid can be water, oil or any various other solvent which is rotated by an impeller within the casing of the pump.

As the shaft turns, a liquid band is established by the centrifugal force produced by the rotating impeller. This pressure holds the liquid ring against the inner wall of the pumping chamber. Since the impeller is situated eccentric to the pumping chamber, the depth of access of the blades in to the liquid ring reduces and increases as the impeller Liquid-Ring Vacuum Pump china rotates. This creates increasing cell quantity on the inlet port 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 takes place through the discharge port.

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

Regarding the two-stage liquid ring pump, the discharge from the initial stage does not discharge to atmosphere. Instead, the first stage discharges through the manifold resulting in the second stage as well as through a discharge slot located in the intermediate plate between your first- and second-stage impellers.