TEST #12 Venting and Gas Filtration Vent Filter Selection Guide

The most important considerations when selecting a gas or vent filter are air flow rate and particulate or microorganism retention. The membrane material in the filter must provide sufficient surface area or open space to accommodate the air flow required by the system. The filter should also efficiently retain particles and aerosol droplets, and, if sterile air or gas is required, retain bacteria. 


Typical Air Flow Rate
Pore Size/EFA
Acro® 37 TF Vent Devices with PTFE Membrane
Small-volume venting and degassing 3.58 L/min at 0.2 bar (20 kPa, 3 psi) 0.2 µm/
7.5 cm2
Bacterial Air Vents with Glass Laminate
For venting and air/gas delivery. Exhibits higher temperature and pressure ratings, and higher air flow rates. 40 L/min at 0.4 bar (40 kPa, 5.5 psi) 1 µm (nominal)/
7.5 cm2
Acro® 50 Vent Devices with Emflon® II Membrane
Ideal for use in air/gas and vent applications with proprietary, low pressure drop hydrophobic PVDF membrane. 27 L/min at 1 bar (100 kPa, 15 psi) 0.2 µm/
20 cm2

Pall Preferred Online Lab Community
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 Capsule with PTFE Membrane
Bioreactor venting requiring high air flow rates. The industry standard for venting bioreactors and fermentors. 32 L/min at 0.07 bar (7 kPa, 1 psi) 0.2 µm/300 cm2
HEPA Capsule
Provides bacteria-free air for sterile applications.   1.2 µm (liquid filtration); 99.97% retention of 0.3 um DOP aerosol (following ASTM D 2986-95A)/860 cm2
Vacushield® Vent Device
Use between a pump and receiving vessel to protect valves and pump components from damage from aqueous solutions; also protects lab personnel from aerosolized contaminants. 8 L/min at 0.1 bar (10 kPa, 2 psi) 0.45 µm/19.6 cm2