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.
“Technically oil-free” compressors have a high chance for contamination, because they are actually lubricated compressors that include oil-removing filters. These compressors are ranked as ISO Class 1.
