This series of products is based on main ultra-fine fiber filter material, using a cyclone, pre-filter and a coalescing fine filter three purification, using with oil-lubricated compressor with the obtained below the oil-free compressor oil content the level of temperament, but also has a very high dedusting capability and some dehumidifying drying capacity. Widely used in pneumatic instrumentation, automatic control and food, pharmaceutical, chemical, textile, oil, paint, telecommunications, metallurgy, rubber and other industries.