DFM series scraping self-cleaning filter (DFM filter for short), automatically removes particles from the filter element surface by the efficiently mechanical scraping, can work on-line continuously, consumes no disposal filter media, requires no frequent manual cleaning, is capable of the filtration for both normal and high viscous liquids. DFM series, the motor drives the scraper to rotate and remove the particles on the filter element internal surface. DFM series are good for the high viscous liquid.