Filtration Solutions for Sterile Gas & Venting

Storage tanks and vessels play a vital role in industries such as food and beverage, water treatment, pharmaceuticals, and chemical processing. Whether holding raw ingredients, intermediate products, CIP solutions, or hot WFI, these tanks are constantly filling and emptying as part of routine operations. To ensure safe and hygienic performance, effective sterile vent filtration is essential. As tanks fill, air needs to be safely released; as they empty, clean air must be drawn in to equalise pressure. Without a well-designed venting system, tanks are at risk of pressure-related failures, including collapse or rupture.

Using the correct sterile vent filter not only protects the contents from airborne contamination but also safeguards the integrity of the tank and the overall process. A properly specified solution supports consistent production, equipment longevity, and compliance with hygiene and safety standards across a wide range of applications.

Sterile Tank Venting

In many food and beverage manufacturing processes product are held in storage or transfer tanks, we need to ensure these products do not come into contact with spoilage organisms. As storage tanks are filled or emptied they breathe and there is the possibility that airborne contamination - particulate or spoilage organisms - will be drawn into the tank and contaminates the product. To prevent this a vent filter is fitted with either a SurePore Gas or PurePore GF cartridge. If the product in the tank is hot or heated there is likely to be vapour above the product and if this encounters a cold filter condensation will occur, which then causes the filter blinding. To prevent this Porefilter can offer heated housing options.

Autoclaves & Lyophilisation

Products, equipment, and tools are sterilised before use in pharmaceutical, hospital and clinical areas. Both autoclaves and lyophilisers are used to sterile equipment and tools to high pressure saturated steam at 121C or above to kill any bacteria, viruses and spores. As part of their operational cycle there is a need to use sterile air to break the vacuum that develops during the end stage of the sterilisation cycle. Autoclave filters are used to ensure that only sterile air enters the autoclave or lyophiliser chamber. Either SurePore Gas PTFE membranes or PurePore GF depth autoclave filters are available dependent on the end users preference and budget.

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