Yitong PTFE cartridge is a hydrophilic filter made of natural hydrophilic 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 industries, chemical plants, beverages & syrups, distilled water plants, etc.