... the use of pure water lubrication, not including oil, oil/air separation element, oil filters, etc.; the annual maintenance cost is ... . The real environmental protection ProductsSince there is no lubricating oil & oil pollution, so all the parts of compressors are with ... motor & Air/water SeparatorAir EndTechnical data water lubricated oil free low noise screw air compressor ModelCM-22Capacity1.04~3 ...