... high viscous liquids.DF filter has 3 sub-series: A series, the pneumatic cylinder drives the scraper up and down to remove ... on the filter element internal surface; the X series and M series are good for the high viscous liquid.The ... scraping filter, automatic continuous online filtration Main Specification Sub-series Pneumatic A series, Electromotive X series and M seriesModels A7, A22, A41, A71, ...