The dry and contact-free operation of Elmo Rietschle’s positive displacement pumps require no lubrication in the pumping chamber. This translates into major advantages: no process contamination and no pollution caused by the pump operation.
This optimized water lubricated technology has the ability to generate both pressure, and vacuum. During operation, the impeller spins, driving centrifugal forces to generate differentials in pressure. This product contains no oil, while also allowing small soft-solids to pass through the pump, unlike other types of vacuum technology and vacuum systems. While running, the water acts as the cooling agent, keeping your pump running efficiently and improving overall pump life.
High quality German engineering has put this product on top of the liquid ring market, ensuring that the quality is top notch.
With over 30 liquid ring pump models and configurations, Elmo Rietschle delivers precision options for your application.
The impeller (1) is the only moving part. The impeller rotates without contact inside the pump casing (2). A rotating liquid ring (3) seals the impeller on the front and seals its blades against one another. Gas flows through the inlet slot (4) into the blade cells. The impeller is offset within the casing. This creates variable compression chambers between the blades (5), which compresses the gas within a full revolution. In order to stabilize the ring, liquid is also permanently sucked into the compression chamber and is expelled (6) together with the conveyed gas.