The SWT oil-free screw compressor series works on a dry compression principle and no lubricating oils are required throughout the entire compression process. The series is ISO8573.1 Class 0 certified and supplies 100% oil-free compressed air. It is designed with a sophisticated processing rotor, gear drive, and a reliable seal combination to provide high quality compressed air. It has long lifespan and a wide scope of applications. The unit is CAD integrated, designed, and made; it employs advanced patented VDT dew point control to monitor the temperature and humidity of the compressed air and to enhance compression efficiency. The drawer-type design enables easy maintenance and repair. The SWTII 75 to SWTII 250 compressors are designed to run on operating pressure ranging from 7.0 to 10.0kg/cm2G and are complete with water-cooling models. The discharge volume ranges from 18.7m3/min to 71.2m3/min to supply 100% oil-free clean compressed air.