PTFE Absolute rated membrane cartridges are highly retentive hydrophobic or hydrophilic membrane filters that have been specially designed for critical applications. The PTFE membrane Cartridge in an all-propylene construction provides excellent chemical compatibility and superior flow per surface area as compared to other membrane cartridges. PTFE cartridge is ideally suited for aggressive chemicals such as acids, bases & solvents. It gives superior flow & pressure drop characteristics for gas filtration & tank venting applications. Are 100 % integrity tested with good particle removal efficiency at 0.1 & 0.2 microns.