A liquid band vacuum pump is easy to operate and is utilized in several applications across various industries. A liquid band pump works with a sealant required in its operation. This liquid can be water, essential oil or any other solvent which can be rotated by an impeller within the casing of the pump.
As the shaft turns, a liquid ring is created by the centrifugal force generated by the rotating impeller. This push 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 entry of the blades into the liquid ring Liquid-Ring Vacuum Pump decreases and improves as the impeller 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 ring. This escalates the pressure until discharge takes place through the discharge slot.
A continuous flow of new sealing liquid is supplied 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. Rather, the initial stage discharges through the manifold resulting in the second stage as well as through a discharge port situated in the intermediate plate between your first- and second-stage impellers.