A liquid ring vacuum pump is easy to operate and can be used in several applications across various industries. A liquid ring pump works with a sealant needed in its procedure. This liquid can be water, essential 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 generated by the rotating impeller. This power holds the liquid ring 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 decreases and increases as the impeller rotates. This creates increasing cellular volume on the inlet interface 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 takes place through the discharge interface.
A continuous flow of refreshing sealing liquid is supplied to the pump via the sealing-liquid inlet.
Regarding the two-stage liquid band pump, the discharge from the first stage will not discharge to Liquid-Ring Vacuum Pump atmosphere. Instead, the initial stage discharges through the manifold resulting in the second stage as well as through a discharge slot situated in the intermediate plate between the first- and second-stage impellers.