The advantages of CMN oil injected screw compressor are reflected in its outstanding energy-saving effect and variable frequency performance. The unit is equipped with a high-efficiency permanent magnet variable frequency motor and variable frequency drive, which automatically adjusts the speed to reduce energy consumption. Maintenance only requires replacing the filter element and air compressor oil. The CMN oil injected rotary screw compressor is designed with no wearing parts, making maintenance simple and the designed service life to be more than 20 years.