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This product is a fully automatic backwash fuel oil filter with structure design artfully, reasonable filtering procedure design .It can not only realize automatic backwash filter screen filter cartridge ，but also the whole process of filtration and reverse wash is  continuous from beginning to run and meet the requirements of unmanned engine room management work. Solve the manual filter can't back flush filter and solve the existing automatic filter is structure complex or  expensive price & can’t discharge harmful impurities automatically .

       This invention for solving the technical problems adopts cylindrical structure, special disc type filter screen of composite filter body, by rotating fluid flow control system, at the same time in the filtration of fuel oil to fully automatic recoil cleaning filter then through differential pressure controller and automatic drain system, automatic timing or according to differential pressure start discharge the harmful impurities .