RO pretreatment filter MWCO: 5k-500k Dalton Material:PVC,PAN,PVDF,PP,PS,PES Dia:4",6",8",10" Casing:UPVC, ... SS,FRP RO pretreatment with Ultra filtration membrane water filtering ... savings & reduction in maintenance cost• Prolong the lifespan of RO membrane from 2 years up to 5 years• Concentration and ... NaOH / NaClO,H2O2 UF membrane filter for pretreatment of RO