PFA (Perfluoroalkoxy Alkane) is a fully fluorinated polymer that provides exceptional resistance to virtually all industrial chemicals. As a member of the fluoropolymer family, PFA combines the universal chemical resistance of PTFE with improved mechanical properties and processability.
Key Properties of PFA
Universal Chemical Resistance:** PFA resists nearly all acids, bases, solvents, and oxidizers at concentrations and temperatures where other materials fail. Only elemental fluorine, molten alkali metals, and certain fluorine compounds at extreme conditions can attack PFA.
Temperature Capability:
PFA maintains chemical resistance across a wide temperature range, from cryogenic conditions (-200°C) to elevated temperatures (+260°C continuous, +300°C short-term). The practical limit in valve applications is typically determined by mechanical design rather than chemical resistance.
Non-Porous Surface:
Unlike PTFE, which can absorb certain chemicals, PFA's melt-processable nature creates a smooth, non-porous surface that releases completely during cleaning—critical for batch operations and preventing cross-contamination.
FDA and USP Compliant:
PFA meets FDA requirements for food contact and USP Class VI standards for pharmaceutical applications when manufactured from virgin resin.
How to Use This Guide
The chemical resistance ratings in this guide are based on manufacturer data, published literature, and field experience. They represent general guidance for material selection:
• Excellent — Full resistance, suitable for continuous service at stated conditions
• Good — Suitable for most applications, verify for critical or extended service
• Limited — Use with caution, testing recommended for specific conditions
• Not Recommended — Alternative materials should be considered
Important:
Chemical resistance can be affected by concentration, temperature, chemical mixtures, and mechanical stress. The data provided is for reference only. For critical applications, contact our engineering team for specific recommendations or request a formal chemical compatibility statement.
