2025-08-18 10:36 PTFE Gaskets are manufactured from polytetrafluoroethylene (PTFE), a high-performance synthetic fluoropolymer of tetrafluoroethylene, renowned for its exceptional chemical and thermal properties. These gaskets are widely recognized for their hydrophobic nature, extremely low coefficient of friction, and outstanding resistance to a broad spectrum of chemicals, making them ideal for a wide variety of industrial applications, including aggressive chemical environments.
To enhance mechanical strength and reduce deformation or creep under high pressure and temperature, PTFE gaskets can be reinforced with fillers such as carbon, graphite, or glass fibers. These reinforcements improve load-bearing capacity while maintaining the intrinsic chemical inertness of PTFE.
PTFE gaskets are available in multiple forms to meet diverse sealing requirements:
Virgin PTFE – pure, unfilled material offering maximum chemical resistance and inertness.
Glass- or carbon-filled PTFE – reinforced for higher mechanical strength and reduced cold flow.
Etched PTFE – surface-treated to improve gasket compressibility and reduce cold flow.
Expanded PTFE (ePTFE) – microporous and flexible, providing excellent conformability for flange sealing.
Key features of PTFE gaskets include:
Excellent chemical resistance to acids, bases, and solvents.
Temperature tolerance ranging from -200°C to +260°C, making them suitable for cryogenic to high-temperature applications.
Low friction and anti-stick properties, which prevent galling or damage to mating surfaces.
High dielectric strength, making them suitable for electrical insulation applications.
Moisture and water resistance, ensuring performance in wet or humid environments.
PTFE gaskets are commonly employed in pipework, flanges, valves, heat exchangers, and equipment in chemical, petrochemical, pharmaceutical, food, and water treatment industries. Their combination of chemical inertness, thermal stability, and mechanical versatility makes them a reliable choice for demanding sealing applications where safety, durability, and contamination prevention are critical.
