... ,PVDF,PP,PS,PES Dia:4",6",8",10" Casing:UPVC,SS,FRP RO pretreatment with Ultra filtration membrane water filtering filter for ... and advanced ultrafiltration technologies. The outer diameter of the membrane is 0.4-0.6mm or 1.5-1.6mm, inside diameter ... cost savings & reduction in maintenance cost• Prolong the lifespan of RO membrane from 2 years up to 5 years• Concentration and separate ...