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Air leaving a compressor is hot, dirty, and wet—which can damage and shorten the life of downstream equipment, such as valves and cylinders. Before air can be used, it needs to be filtered, regulated, and lubricated. This article answers the question of what does air regulator and lubricator do?An airline filter cleans compressed air. It strains the air and traps solid particles (dust, dirt, rust), and separates liquids (water, oil) entrained in the compressed air. Filters are installed in the a …