The overall mechanism of an air compressor is a piston or rotary Water Lubricated Air Compressor component (e.g. rotary screw or vane) that allures surroundings, which is compressed into a storage container. Naturally, because the piston or rotary component needs to move consistently and smoothly because of this to function, it generally must be lubricated.
In a lubricated air compressor, there is lubricating oil which will keep the piston or rotary element running well 
without damaging the mechanism. The lubricant also really helps to dissipate warmth and maintain air compression efficiency.
Oil-free of charge air compressors also use a piston or rotary element, however they get around the lubrication problem by coating the compression component with a pre-lubricating materials like Teflon. Some oil-free compressors may also use water in place of essential oil for the lubricating and cooling process. These alternate materials secure the pump and invite the mechanism to move smoothly without the need for any oil-based or synthetic lubrication.