PALL Efficient and reliable membrane air, gas and vent filtration are perfect for biopharmaceutical production to protect the quality of drug products. Sterilizing-grade air filters are used for biopharmaceutical products from contamination by microorganisms or particles during processes, this is done through gas venting from tanks or bioreactors, compressed gas filtration, and high-temperature or highly oxidizing situations. Non-sterilizing filters reduce bioburden for non-critical applications.