... filtration membrane water filtering filter for water treatment with different membrane material (PES,PS,PVDF,PVC,PAN,PP)Hollow fiber ultrafiltration membrane ... &Virus Removal 99.99%SpecificationSize(mm) 90x1175 TypeInside-Out Hollow fiberMaterialAlloy-PVC (PAN,PVDF,PS)I/O Diamater of ... Flushing Cycle6-180daysChemicals Flushing Time15-120minsChemicalsCitric acid,NaOH / NaClO,H2O2 UF water filter plant