Clean, filtered gases are a basic requirement in order to ensure the proper function of individual components in gas mixing platns. Specifically, seals can be damaged by dirt particles in the media flow. The new WEH gas filter type TSF4 was developed to remove the dirt particles in the gas flow and it is particularly useful in gas filling systems for inert gases like argon and nitrogen. The gas flows through the filter and the filter retains dirt any particles contained in the gas. The type TSF4 is suitable for high-pressure applications and is particularly easy to maintain. The filter element can be removed for cleaning pruposes without removing the media lines.