Thanks to the progressive development and engineering of DVP's LC range of vacuum pumps, the global water crisis caused by the use of liquid ring vacuum pumps, has been, in many cases greatly reduced. The dire state of Australia's water resources has meant new ideas are needed to conserve what water is left.

Our lubricated pumps and in particular our WR series pumps, not only do not use water but they guarantee better vacuum level, no water treatment procedures and lower operation and installation costs. The lubricating oil used by our pumps is recovered at the pump exhaust and collected to be reused after filtration.

Liquid ring pumps need clean chilled water to operate and to generate vacuum efficiently. They require a purification treatment and cooling system for the liquid and that means a comprehensive cost for installation, operation and monitoring. DVP's WR oil lubricated vacuum pumps are the solution that was missing in many wet applications.

These units have been designed to be installed where non aggressive liquids (typically cooling liquids) could be sucked by the vacuum pumps. They have a stand-alone configuration and a very compact shape. A ball valve installed at the tank intake allows the insulation of the unit from the working machine during routine maintenance operations.

The first separation (air-liquid) is done in the 25 litres, aluminium tank in which the internal configuration generates a cyclone effect. On the external surface of the tank is lodged a floating type level gauge that allows an easy control of the amount of liquid inside and it is equipped with a sensor that provides an electric signal when the maximum level is reached. Moreover the tank is equipped with an automatic drain valve that acts when the pump is stopped. Then the fluid reaches the external condensate separator filter on which it is installed a vacuum gauge and a valve.

The filter is connected to the pump by a rigid pipe on which is lodged an auxiliary antisuck back valve. The LB series, WR version are the vacuum pump installed on these units that are fitted with the high efficiency gas ballast device that allow the pump to separate the moisture still present and to evacuate it when the pump is stopped.