Kaeser Compressors Inc. said it has redesigned its 15- and 20-hp SK rotary screw air compressor series to be more efficient and easier to maintain with a smaller footprint. The redesigned units provide greater flow at 46-89 cfm with pressures from 80-217 psig. The SK series still features the Sigma Profile air end, as well as automatic belt tensioning and premium energy-saving motors available with variable speed drive. The units are available as a stand-alone compressor units with integrated dryers or as AirCenter packages.