What type of compressors use oil to both cool compressed air and seal between the rotors?

Oil-flooded screw compressors utilize oil not only for lubrication but also to cool the compressed air and provide effective sealing between the rotors. In these compressors, a mixture of oil and air circulates, which aids in heat dissipation, reducing the temperature of the compressed air. The oil also fills the gaps between the rotors, creating a seal that minimizes the volume of air that escapes, thereby enhancing efficiency.

This dual functionality of the oil is crucial for operating within optimal performance levels, as it reduces wear on components and ensures a consistent output of compressed air with lower temperatures. Other compressor types, such as dry screw compressors, centrifugal compressors, and reciprocating compressors, do not employ oil in the same way for cooling or sealing; hence they do not share this characteristic feature. Understanding the operational mechanics of oil-flooded screw compressors is essential for efficient maintenance and troubleshooting in various industrial applications.