Understanding PTFE Grades
PTFE (polytetrafluoroethylene) — commercially known as Teflon — is available in multiple grades, each engineered for specific performance requirements. Virgin PTFE offers the highest chemical resistance and electrical insulation. Filled grades incorporate additives such as glass fibre, carbon powder, or graphite to enhance mechanical properties like wear resistance, stiffness, and thermal conductivity.
Choosing the right PTFE grade is critical to component performance and service life. Visanix Global supplies all standard PTFE grades as rods, sheets, tubes, and custom machined components. Contact us to discuss grade selection for your specific application.
Grade Comparison
| Grade | Chemical Resistance | Wear Resistance | Stiffness | Best For |
|---|---|---|---|---|
| Virgin PTFE | ★★★★★ | ★★☆☆☆ | ★★☆☆☆ | Chemical & pharma sealing |
| 15% Glass Filled | ★★★★☆ | ★★★☆☆ | ★★★☆☆ | Structural gaskets, slide pads |
| 25% Glass Filled | ★★★★☆ | ★★★☆☆ | ★★★★★ | Bridge bearings, heavy load |
| 25% Carbon Filled | ★★★☆☆ | ★★★★★ | ★★★☆☆ | Dynamic seals, piston rings |
| Carbon + Graphite | ★★★☆☆ | ★★★★★ | ★★★☆☆ | Dry running, compressors |
| 25% Graphite Filled | ★★★☆☆ | ★★★★☆ | ★★★☆☆ | Slide bearings, low friction |
Frequently Asked Questions
What PTFE grades do you supply in India?
Visanix Global supplies all major PTFE grades including Virgin PTFE, 15% Glass Filled, 25% Glass Filled, 25% Carbon Filled, Carbon + Graphite Filled, and 25% Graphite Filled from our Gurugram facility across India.
What is the difference between virgin PTFE and filled PTFE?
Virgin PTFE is pure PTFE with maximum chemical resistance and electrical insulation. Filled PTFE grades contain additives (glass, carbon, graphite) that improve specific mechanical properties like wear resistance, stiffness, or thermal conductivity, at a slight reduction in chemical resistance.
Which PTFE grade is best for chemical applications?
Virgin PTFE offers the highest chemical resistance and is recommended for most chemical processing applications. For applications requiring improved mechanical strength, 15% or 25% glass filled PTFE is recommended.
Which PTFE grade is best for wear applications?
25% Carbon Filled PTFE or Carbon + Graphite Filled PTFE are recommended for dynamic wear applications such as piston rings, seals, and bushes where the component is in continuous motion.
Do you provide material test certificates for all PTFE grades?
Yes. Visanix Global provides Material Test Certificates (MTC) with every order for all PTFE grades. Full material traceability is maintained.
Not Sure Which Grade You Need?
Tell us your application, operating temperature, chemical environment, and load conditions. We will recommend the right PTFE grade and supply it from Gurugram across India.