... absolute filtration accuracy of calibration, filtering than β3, β5, β10, β20 ≥ 200, filtration efficiency η ≥ 99.5%. Assessment methods ISO16889-99 and ... GB/T18853-2002.ZU-H, QU-H series pressure pipe passing through filter cartridge Model: HX-40 × * HX ... -250 × * HDX-400 × * HDX-630 × *(* Representing 1,3,5,10,20,30,40)