Developed by Kaishan in the USA, the new range of ‘krof’, 2-stage, oil-free rotary screw compressors are now available in Australia. The high-quality machines offer good performance for companies that must have class zero air (ISO 8573-1 Class 0 oil-free). The high-performance, high-efficiency compressors have met stringent manufacturing and handling demands. By using two sequential compression stages, intercooling and aftercooling, users will receive high-quality air suitable for sensitive applications where purity is critical and contamination by even the smallest quantities of lubricant can result in costly production downtime and product spoilage. The advanced control panel contains a special programmed microprocessor that can safely and efficiently control all functions of the compressor. The controller monitors line pressure, oil temperature and working conditions (running, idling and stop).