... ",6",8",10" Casing:UPVC,SS,FRP RO pretreatment with Ultra filtration membrane water filtering filter for water treatment with different ... savings & reduction in maintenance cost• Prolong the lifespan of RO membrane from 2 years up to 5 years• Concentration and separate ... Cycle6-180daysChemicals Flushing Time15-120minsChemicalsCitric acid,NaOH / NaClO,H2O2 UF membrane filter for pretreatment of RO