... water.4.With distinctive removing impurities techniques filtering through double FH trapezoidal network and absorbing by high polymer material, ... the β3equal or surpass 200 and make the cleanness lower grade 6(NAS1638).5. spiral, automatic back flushing system.6. ... oil filtering,oil filtration,energy saving,oil regeneration,oil processor,oilfilter,oil process,oil purify,oil regenerating,oil restoration ...