The general mechanism of an air compressor is a piston or rotary element (e.g. rotary screw or vane) that allures surroundings, which is compressed into a storage tank. Naturally, since the piston or rotary component needs to move regularly and smoothly for this to work, it generally must be lubricated.

In a lubricated air compressor, there is lubricating oil which keeps the piston or rotary element running smoothly without damaging the mechanism. The lubricant also really helps to dissipate high Water Lubricated Air Compressor temperature and keep maintaining air compression efficiency.

Oil-free of charge air compressors also use a piston or rotary element, but they bypass the lubrication problem by coating the compression component with a pre-lubricating materials like Teflon. Some oil-free compressors may also use water instead of essential oil for the lubricating and cooling procedure. These alternate materials defend the pump and allow the mechanism to go smoothly without the need for any oil-centered or synthetic lubrication.