Oct 29, 2021 · NWF series cartridges filter media is a hydrophobic PTFE membrane, applicable to the pre-filtering and sterilization of gas and solvent. PTFE membrane has the strong hydrophobicity, its water erosion resistance capacity is 3.75 times stronger than the ordinary PVDF, so applicable to gas pre-filtering and precise filtering and solvent sterilization, they are widely applied in pharmacy, food