China manufacturer of PTFE Gasket Washer for Corrosion Resistance
What is PTFE ?
Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene, and has numerous applications because it is chemically inert.
Polytetrafluoroethylene is a fluorocarbon solid, as it is a high-molecular-weight polymer consisting wholly of carbon and fluorine. PTFE is hydrophobic: neither water nor water-containing substances wet PTFE, as fluorocarbons exhibit only small London dispersion forces due to the low electric polarizability of fluorine. PTFE has one of the lowest coefficients of friction of any solid.
PTFE (Polytetrafluoroethylene) gaskets, also known as Teflon® gaskets, are the go-to sealing components for industries demanding unmatched resistance to extreme temperatures, aggressive chemicals, and corrosive environments.
PTFE gaskets are made of synthetic fluoropolymer of tetrafluoroethylene consisting completely of carbon and fluorine.
Specification of PTFE gaskets
| Property | PTFE Gasket Performance |
|---|---|
| Temp Range | -200°C to +260°C (-328°F to +500°F) |
| Pressure | Up to 150 psi (varies by design) |
| Thickness | 0.5mm to 6mm (customizable) |
| Standards | FDA, USP Class VI, DIN 3754 |
Types of PTFE Gaskets
Virgin PTFE Gasket – Pure PTFE material, best for chemical processing and food-grade applications.
Filled PTFE Gasket – Reinforced with glass, carbon, graphite, or bronze to enhance mechanical strength and wear resistance.
Expanded PTFE Gasket (ePTFE) – Soft, flexible, and highly conformable, suitable for uneven or fragile flanges.
Benfit of PTFE vs. Other Gasket Materials
- PTFE vs. Rubber: PTFE outperforms rubber in chemical resistance and temperature limits.
- PTFE vs. Graphite: No oxidation risk, ideal for oxidizing agents like nitric acid.
- PTFE vs. Silicone: Higher mechanical strength and lower gas permeability.
Applications of PTFE Gaskets
Chemical Processing – Withstands acidic and corrosive chemicals, making it ideal for piping, pumps, and reactors.
Oil & Gas – Used in high-pressure pipelines and valves for leak-proof sealing.
Pharmaceutical & Food Industry – FDA-compliant PTFE gaskets ensure hygienic and contamination-free processing.
Semiconductor & Electronics – Provides electrical insulation and high-purity sealing in semiconductor manufacturing.
Power Plants & HVAC – Ideal for steam, high-pressure, and cryogenic applications.
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