PTFE filter bag selection should start with the dust, gas chemistry, operating temperature, moisture conditions and cleaning system. The term “PTFE filter bag” may describe a bag made with PTFE felt, while “PTFE membrane” describes a surface membrane that can be laminated to a supporting filter media. The substrate and complete bag construction should therefore be confirmed rather than inferred from the product name alone.
This guide explains the main differences between PTFE felt and membrane constructions and lists the information needed for a preliminary dust-collection review. Final suitability depends on the full operating conditions, baghouse design and confirmed product specification.