Edwards Vacuum introduces a range of new liquid ring pumps for the industrial and rough vacuum markets – the ELRi series. The pumps are made for applications that are wet, humid and corrosive.
The stainless steel impeller, endplates, liquid reservoir and heat exchanger make this pump highly resilient against corrosion and harsh process gases. The internal injection channels reduce the risk of leakage while the horizontal motor flange arrangement saves maintenance time. Mechanical seals also ensure reliable operation by preventing leaks and extending service intervals. State-of-the-art technology is contained in a compact noise cancelling sturdy canopy protecting and extending lifetime of the electronic components.
The ELRi is equipped with two variable speed drives (VSDs). While the main VSD matches the speed of the pump to vacuum level by adjusting its speed, the second VSD regulates the water flow through the centrifugal pump according to the operating conditions to avoid risks of cavitation. A patented algorithm maintains harmony between the two VSDs to ensure performance. The product is protected against automatic seizure, so users do not have to worry about the pump failure after long periods of inactivity.
