The oil-free screw compressor element
No oil means that there is no essential oil for sealing the rotors and for cooling the compressed air, components and rotors. … The component is usually cooled by cooling water that flows through Oil-free Screw Air Compressor unique pockets in the element casing.
In a lubricated screw compressor, the lubricant comes in direct in contact with the compressor inlet air and compressed air. … The essential oil contains anti-oxidants to try to reduce the breakdown of the lubrication properties because of internal conditions.