QDT 20+ Air Compressor FilterDescription The high efficiency activated carbon tower is capable of removing hydrocarbons, odors and oil vapor from compressed air. The activated carbon will, by the use of adsorption, reduce the residual oil content to lower than 0. 003 mg m. View Catalog Key Features: Maximum oil vapor removal Superb activated carbon material. Low pressure drop Optimal internal flow path. High reliability Robust design and optimal filter material.