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Venting and Gas Filtration

For the safety of the workers and your equipment, always use a vent filter. These devices act as barriers on air lines. They contain hydrophobic media, which prevent the entry of water and aerosols into sensitive equipment and also protect the lab environment from aerosolized pathogens. Vent filters can also enable air to enter and exit vessels such as bioreactors, while maintaining the sterility of the interior environment. (more)

Products


Applications




Filtration Hardware
Large-scale Vent Filters
PTFE Membrane Disc Filters
Sterile Filtration and Clarification

Vent Filters Maintain Sterility

Vent filters provide a sterile barrier for air or gases entering or exiting vessels such as bioreactors, fermentation tanks, or carboys. These maintain the sterility of the interior environment and protect the atmosphere from contaminants within the vessel.

Considerations of Selecting Vent Filters

Pall offers self-contained, compact filter devices for high efficiency removal of airborne bacteria and particulate under dry or moist conditions. 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.

Vent Filtration Air Flow Performance

In venting and air filtration applications, air flow is a criticial performance parameter. Pall's products offer Effective Filtration Areas (EFAs) ranging from 7.5 to 300 cm2, allowing users to select the most appropriate vent size for their application. Our hydrophobic membranes prevent the passage of aerosols, protecting equipment and staff. We incorporate rugged polypropylene housings for broad chemical compatibility. Pall's hydrophobic membranes include:
  • PTFE: Offers the highest level of hydrophobicity and assures the best system performance when used as a sterile barrier in venting or particulate control. PTFE will not absorb moisture that can cause premature reduction of air flow.
  • PVDF: Can be gamma irradiated.
  • Glass Laminate: The most economical choice also provides the highest air flow rates.

Venting Applications

  • Receiving vessels
  • Isolation or environmental chambers
  • Bioreactors
  • Fermentation tanks
  • Carboys
  • Other small containers

In-line Low-pressure Sterile Air/Gas Applications

Delivery to instruments and culture vesssels
  • Bioisolation of a vacuum source
  • Flushing instruments
  • Cleaning parts
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