The variable speed drive series (VSD, frequency-controlled) oil-injected screw compressors offers energy savings of 50% on average, a leap in performance (13% more Free Air Delivery) and a canopy less than half the size of the old fixed speed model. With the extension to the higher range, up to 37kW, the company offers the VSD+ technology to 75% of the oil-injected screw compressors market sold worldwide. The compressors offer a “condensation prevention cycle”. Thanks to an algorithm in the controller, the Elektronikon Graphic, condensation in the compression oil is prevented in all circumstances, even when the compressor is oversized for the application and has to deal with extremely low loads. This condensation prevention cycle is another important step towards a 100% VSD ratio (the relative number of Variable Speed Drive units on the total number of compressors sold), as it allows all compressor users to opt for a Variable Speed Drive and save 50% on their compressor’s electricity bill.