If you require constant and large quantities of compressed air over a long period of time, screw compressors or also called rotary screw compressors are your first choice for supplying compressed air to production processes in industry, trade and commerce. By progressive rotation of the spindle-shaped, intermeshing rotors, the incoming air is continuously compressed. The screw compressor thus belongs to the group of rotary or displacement compressors. Oil is often used in conventional compressors for lubrication and sealing, whereas in industries (e.g. food, pharmaceutical, medical, electrical engineering, etc.) where compressed air comes into contact with end products, the use of oil-free compressors is necessary. Among other things, screw compressors are characterised by the fact that they are very quiet in operation and are suitable for continuous operation.