The rotary screw air compressor is popular in factories, plants, or any manufacturing facility due to the cycle on which it runs. Whereas other types of air compressors can only work for on/off cycles, the rotary screw run non-stop around the clock. TWith a 100% duty cycle, rotary screw air compressors should not be shut off and started back up on a recurrent basis. As long as a rotary screw compressor is sized correctly, its efficiency is superior to most other air compressors. The best models of rotary screw compressor help factories maximize efficiency across the chain of production.