Zay series high efficiency oil-water separator is a new generation of compressed air secondary purification (gas water separation and filtration) device in China. It has good technical performance and wide applicability. It can be installed after the compressor, after cooler, before the freezing dryer, adsorption dryer, or on the main pipe of general industrial gas to effectively separate and filter the pollutants (oil, water, dust) in the compressed air. After treatment, the compressed air can basically reach no liquid oil, water and micron precision solid particles.