Oil-free Screw Air Compressor
The oil-free screw compressor element
No oil means that there is no oil for sealing the rotors and for cooling the compressed air, elements and rotors. ... The element is cooled by cooling water that flows through special 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 oil contains anti-oxidants to try to reduce the breakdown of the lubrication properties due to internal conditions.