Attributes of sterilizing-grade air and gas cartridge filters The key attributes to consider when selecting sterilizing-grade air and gas filters16 September 2024 16 September 2024 9 minute read 9 minute read By: By: Laurence WilliamsOverviewSterilizing-grade air and gas cartridge filters are used in critical applications in the food and beverage industry, to remove microorganisms from air or other gases such as nitrogen or carbon dioxide. Sterilizing-grade filters must feature:Microbial RetentionHydrophobicityLow Resistance to AirflowRobustnessSuitable GeometryIntegrity TestabilityApplication CompatibilityAbsence of Toxic SubstancesDocumented Validation, Quality and TraceabilityThis article describes the key attributes to consider when selecting sterilizing-grade air and gas filters. Figure 1: Pall Emflon® sterilizing-grade filter cartridgeMicrobial RetentionMicrobial retention is the single most important performance attribute of sterilizing-grade air filters. Figure 5 : Typical sterilizing-grade air filter cartridge showing twist-lock, double bayonett design, two O-rings and cartridge locating fin. Application CompatibilityDuring their service life, sterilizing-grade air filters are exposed to air for many months up to a year or longer.