As a manufacturer of air compressors, we often receive inquiries from customers about the differences between oil-free and oil-injected compressors. One common question is "What is the difference between oil-free screw compressors and oil-injected screw compressors?" In simple terms, oil-injected compressors use oil to lubricate the moving parts and to help cool the compressed air, while oil-free compressors use other methods such as air or water cooling and specialized coatings to achieve the same results without the use of oil.

 Another question we often get asked is how oil-free compressors are able to compress air without the use of oil. Unlike oil-injected compressors, which use oil to create a seal between the rotors, oil-free compressors use specialized rotor coatings, such as PTFE (polytetrafluoroethylene) or other synthetic materials, to create a seal that prevents air from leaking past the rotors. This allows the compressor to compress air without the need for oil, resulting in cleaner compressed air that is free of oil contamination.

 We hope this information helps to answer the questions you may have about the differences between oil-free and oil-injected screw compressors and how oil-free compressors are able to compress air without the use of oil. If you have any further questions, please don't hesitate to contact us.