Liquid-Ring Vacuum Pump

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

As the shaft turns, a liquid ring is established by the centrifugal force produced by the rotating impeller. This pressure holds the liquid ring against the inner wall structure of the pumping chamber. Since the impeller is located eccentric to the pumping chamber, the depth of access of the blades in to the liquid ring decreases and boosts as the impeller rotates. This creates increasing cellular quantity on the inlet slot side, creating vacuum.

On the discharge interface 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 interface.

A continuous flow of clean sealing liquid is supplied to the pump via the sealing-liquid inlet.

In the case of the two-stage liquid ring pump, the discharge from the initial stage does not discharge to atmosphere. Rather, the 1st stage discharges through the manifold resulting in the second stage in addition to through a discharge interface positioned in the intermediate plate between the first- and second-stage impellers.