replacement pall high filter HFU620,HFU640,HFU660. pleated cartridge. crescent-shaped ... its large 6"/ 152 mm diameter, reduces the number of filters and size of housing required. Materials of Construction1. Filter Medium ... propylene Operating Conditions Maximum Operating Temperature: 82°C replacement part number: HFU620, HFU640, HFU660 replacement cartridge grade: UY020,UY045,UY100,UY200,UY400 ...