PTFE gaskets are engineered sealing solutions offering full chemical resistance, wide temperature capability and non-stick performance. They are commonly used for sealing flanges, pumps, valves and fluid lines exposed to corrosive, acidic and alkaline media. Due to low friction and long service life, PTFE gaskets are widely applied in demanding industrial sealing applications.
What are PTFE Gaskets?
PTFE gaskets (Polytetrafluoroethylene gaskets) are high-performance sealing components
designed for applications involving corrosive chemicals, wide temperature ranges and reliable long-term sealing.
Thanks to the inherent properties of PTFE, these gaskets provide excellent chemical resistance, low friction and non-stick behavior,
making them a standard choice for critical industrial sealing systems.
Engineering Advantages of PTFE Gaskets
- Full chemical resistance: Resistant to almost all acids, alkalis, solvents and corrosive media.
- Wide service temperature range: Typically from -200 to +260 °C.
- Non-stick surface: Easy installation and removal without flange adhesion.
- Very low coefficient of friction: Suitable for sensitive and hygienic applications.
- Excellent dimensional stability: Minimal deformation under thermal cycling.
- Moisture and corrosion resistant: No water absorption or chemical reaction.
- Long service life: Reliable sealing performance over extended operating periods.
Typical Applications of PTFE Gaskets
- Flange sealing in pipelines and process lines
- Pumps, valves, compressors and mechanical joints
- Chemical and acid handling systems
- Food and pharmaceutical processing equipment
- Oil, gas and petrochemical industries
- Steam lines and heat exchangers
- Laboratory and sensitive process equipment
PTFE Gasket Grades
- Virgin PTFE: Maximum chemical resistance and hygienic applications
- Glass-filled PTFE: Improved dimensional stability and pressure resistance
- Carbon-filled PTFE: Enhanced wear resistance for dynamic sealing
- Bronze-filled PTFE: Better thermal conductivity and load capacity
- Graphite-filled PTFE: Improved performance in steam and thermal applications
- Ceramic-filled PTFE: High rigidity for severe operating conditions
Technical Characteristics
| Property | Typical Value |
|---|---|
| Service Temperature | -200 to +260 °C |
| Chemical Resistance | Full |
| Shore D Hardness | 50 – 65 (depending on grade) |
| Water Absorption | Nearly zero |
| Coefficient of Friction | 0.05 – 0.10 |
Frequently Asked Questions
Are PTFE gaskets suitable for acidic media?
Yes, PTFE offers full chemical resistance against almost all acids and corrosive chemicals.
Which PTFE gasket grade is best for steam?
Glass-filled and graphite-filled PTFE grades are commonly selected for steam applications.
Can PTFE gaskets be used at high pressure?
For higher pressures, filled PTFE grades such as glass, carbon or bronze-filled are recommended.
For selecting the right PTFE gasket for your application, contact the technical team at Toseeteflon.