They are made purely of hydrophobic PTFE (polytetrafluoroethylene) and are therefore permanently hydrophobic. Unlike other (hydrophilic) filter types, they are not wetted by air humidity, allowing unhindered passage of air at low differential pressures. CHM® MTF/H membrane filters have an excellent chemical compatibility; they are also used for the filtration of aggressive chemicals, and acids, to which other filter types are not resistant. Due to their hydrophobic characteristics, they must be pre- wetted with ethanol or methanol before the filtration of aqueous media. The main application of this membrane filter type is air/gas filtration.

MTF/H PTFE Hydrophobic membrane filters

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