In connection with the development of the microelectronic industry, the demand for emission control systems for clean production facilities has increased sharply. Teflon-coated stainless steel air ducts are widely used instead of polyvinyl chloride or polypropylene as they comply with the requirements of fire safety and acid- resistance.
Teflon coating means a PTFE coating (Polytetrafluoroethylene), also called fluoropolymer, manufactured by Dupont and ETFE (ethylene trifluoroethylene) manufactured by Chemours.

Air ducts with teflon-coating are perfect for use in exhaust systems that remove air containing acids and alkalis fumes. The coating obtains high chemical resistance to the vast majority of substances used in the microelectronic industry. The teflon-coated air ducts have high mechanical strength which allows to use them in ventilation systems with medium- and- high pressure.