An “oil-free” air compressor does not use any lub...

An “oil-free” air compressor does not use any lubrication in the compression chamber. Instead, these compressors use alternate materials that protect the pump, such as water or a Teflon coating, and allow the mechanism to move smoothly without the need for any oil-based or synthetic lubrication. An “oil-free” air compressor does not use any lubrication in the compression chamber. Instead, these compressors use alternate materials that protect the pump, such as water or a Teflon coating, and allow the mechanism to move smoothly without the need for any oil-based or synthetic lubrication. Oil-free air compressors are a perfect solution for the compressed air applications where meeting the highest air purity standards is key. Air compressors function based on a very simple principle: When the air is compressed, its volume decreases whereas the pressure increases. In that same vein, oil-free and oil-injected air compressors work in essentially the same way. Air compression is a two-stage process in which the pressure of air rises while the volume drops.