0.2 µm/ 20 cm2 Acro® 50 Vent Devices with PTFE Membrane Venting bioreactors, fermentation tanks, and carboys; sterile gas purging of culture vessels. L/min at 0.2 bar (20 kPa, 3 psi): 0.2 µm: 8 0.45 µm: 12 1 µm: 15 0.2, 0.45, 1 µm/ 19.6 cm2 AcroPak 300