Intelligent Liquid Ring Vacuum Pump


EDWARDS VACUUM has combined its years of comprehensive know-how and innovative technical expertise to develop a revolutionary range of new liquid ring pumps – the ELRi series.


The technical features are of central importance in this new development. The stainless steel impeller, endplates, liquid reservoir, and heat exchanger makes 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 precious time on maintenance. The use of mechanical seals also ensure reliable operation by preventing leaks as well as extending service intervals. All this state-of-the-art technology is contained in a compact noise-canceling sturdy canopy protecting and extending the lifetime of the electronic components.


The ELRi is equipped with not just one but two VSD. 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 always maintains a perfect harmony between the two VSD’s ensuring optimal performance. In addition, it is protected against automatic seizure, so users do not have to worry about pump failure after long periods of inactivity.


The integrated Air logic controller not only enables the monitoring of important features and parameters of the pump but also offers the option of set-point control. This allows users to have a vacuum pump that matches the process demand saving energy. While the ECOntrol box even allows you to connect and control multiple ELRi pumps, the Icon Box enables smart monitoring and remote control ensures optimal servicing to get maximum uptime with your pumps. Along with this, water consumption is also reduced as the separator is only filled up when required.


The ELRi series comes in pumping capacity 750-1050m3/hr covers a wide range of applications in the central vacuum, pharmaceutical, plastics, conveying and food applications. All pumps are also fitted with spray nozzles as standard which are particularly useful for high steam load applications allowing to pump increased capacity of gas load.” Moreover, the manual and automatic modes of flushing allow operation even in the dirtiest applications with minimal downtime.

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