Description Yitong PTFE cartridge is a hydrophobic filter made of natural hydrophobic PTFE membrane and polypropylene support layers and components.PTFE Membrane Filter Cartridge are retentive that offers superior hydrophobicity and water intrusion resistance compared to PVDF and polypropylene membranes.It is ideal for gas/vent applications and the filtration of aggressive chemicals and solvents, and best fit for critical processes in pharmaceutical. Features: 1 High contaminant capacity 2 Great bacteria interception ability 3 Great adsorption ability 4 100% forward flow integrity tested before delivery 5 Long lifespan Application The sterilizing filtration of different gas: Compressed air, fermentation gas, etc.