Trusted PTFE / Teflon® O-Ring Manufacturer in China with Superior Quality & Price
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- Incoterm: EXW, FOB, CIF
- Shipping Way: By Air or Sea
- Manufacturer Place: Ningbo, China
- Delivery Time: 7 - 30 days
- Factory Status: Stocked for Sale
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Description
PTFE O-Rings, commonly known as Teflon® O-Rings, are high-performance sealing components with an O-shaped profile made from polytetrafluoroethylene. Technically, they are not elastomeric rubber rings but thermoplastic O-rings, earning PTFE its renowned title as the “King of Plastics” for its supreme all-around performance. As the most prominent member of the fluoropolymer family, PTFE combines exceptional chemical inertness, thermal stability, and an extremely low coefficient of friction, making it the ideal solution where traditional rubber fails.
PTFE/Teflon® O-Rings deliver outstanding stability from -150°C to +260°C and resist nearly all aggressive acids, solvents, and bases without swelling or degrading. Their ultra-smooth, non-wetting surface eliminates “stick-slip” phenomena, ensuring minimal friction and consistent sealing even under severe static or dynamic pressures.
The Teflon® brand was originally developed by DuPont in 1938 (discovered by Roy J. Plunkett) and is now owned by Chemours. Just as Viton® is synonymous with FKM, high-purity PTFE has become the global synonym for high-purity PTFE. At Savvy Rubber, we guarantee 100% virgin PTFE material in all our O-rings.
Specifications
- Material: PTFE / Teflon® / Polytetrafluoroethylene
- Continuous Temperature Range: -150°C (-238°F) to 260°C (500°F)
- Low Operating Temperature Limit: -190°C (-310°F)
- Short-Term Maximum Temperature: 300°C (572°F)
- Durometer Hardness Range: Shore D 50-60
- Standard Durometer Hardness: Shore D 55
- Color: White (standard), custom color is available
- Outline: Circle (standard), square, rectangular, custom
- Cross Section Profile: Round (standard), square, X, D, T, custom
- Cross Section Width (CS): 0.8 to 30 mm (0.032 to 1.181 inch)
- Inside Diameter (ID): 0.9 to 650 mm (0.035 to 25.590 inch)
- Standard Size: AS 568, BS 1806, ISO 3601, DIN 3771, JIS B 2401
- Shelf Life: About 20 years
- Compliance: RoHS, REACH, FDA (available upon request)
- Price Level: High
Performance Characteristics
The table below summarises the typical performance of standard PTFE / Teflon® O-ring across key environmental resistance, chemical compatibility, and mechanical attributes. Ratings are based on industry-standard evaluations: Excellent (recommended), Good (suitable with limitations), Fair (limited use), and Poor (not recommended).
Excellent
- Ozone
- Weather
- Chemicals
- Oils
- Water
- Acid
- Alkali
- Flame
Good
- Steam
Fair
- Tensile Strength
Poor
- Abrasion
- Compression Set
Ratings apply to standard unfilled virgin PTFE. Filled or modified grades may exhibit improved mechanical properties. Always consult application-specific data for critical sealing environments.
Material Data Sheet
The following table presents the physical properties and resistance performance of our standard 100% virgin unfilled PTFE (Teflon®) material. All test results are based on sintered material tested in accordance with the indicated ASTM and UL standards, covering mechanical properties, environmental resistance, and processing stability.
| Savvy Rubber PTFE (Teflon®) Material Data Sheet | |||
|---|---|---|---|
| Material Type: 100% Virgin Unfilled PTFE | |||
| PHYSICAL PROPERTIES | TEST METHOD | UNIT | TEST RESULTS |
| Density | ASTM D792 | g/cm³ | 2.12 ~ 2.22 |
| Water Absorption | ASTM D570 | % | ≤ 0.05 |
| Flammability | UL94 | Rating | V-0 |
| MECHANICAL PROPERTIES | TEST METHOD | UNIT | TEST RESULTS |
| Tensile Strength | ASTM D638 | MPa | ≥ 15 |
| Elongation at Break | ASTM D638 | % | ≥ 160 |
| Flexural Modulus | ASTM D790 | MPa | ≥ 200 |
| Compressive Strength (Parallel) | ASTM D695 | MPa | ≥ 11.8 |
| Hardness, Shore D | ASTM D2240 | — | ≥ 50 |
| Friction Coefficient (Steel counterface, 0.5 m/s, 1 MPa) | ASTM D1894 | — | ≤ 0.2 |
| THERMAL PROPERTIES | TEST METHOD | UNIT | TEST RESULTS |
| Melting Point (Tm) | ASTM D3418 | °C | 327 ± 10 |
| Glass Transition Temp (Tg) | ASTM D3418 | °C | 119 ± 10 |
| Max Operating Temperature | ASTM E2402 | °C | ≤ 260 |
| Min Operating Temperature | — | °C | ≥ -200 |
| Linear Thermal Expansion Coeff. | ASTM E831 | 10-5 /°C | 9 – 17 |
| Thermal Conductivity | ASTM C177 | W/(m·K) | 0.25 |
| Specific Heat Capacity | ASTM E1269 | J/(°C·g) | 1.05 |
| ELECTRICAL PROPERTIES | TEST METHOD | UNIT | TEST RESULTS |
| Dielectric Constant | ASTM D150 | — | 2.1 |
| Volume Resistivity | ASTM D257 | Ω·cm | 1018 |
| Surface Resistivity | ASTM D257 | Ω | 1017 |
| Electrical Strength | ASTM D149 | kV/mm | 10 |
| CHEMICAL & OTHER | TEST METHOD | UNIT | TEST RESULTS |
| Oxygen Index | ASTM D2863 | % | ≥ 90 |
This is the Material Data Sheet (MDS) for our standard virgin unfilled PTFE plastic. Test results are typical values. Actual performance may vary by operating conditions, environmental exposure, and application specifics. For critical applications, we recommend sample testing.
Features
100% Virgin Unfilled PTFE (Teflon®) O-Rings perform reliably in extreme industrial conditions. They offer excellent chemical resistance to acids, alkalis, solvents, and steam, with a wide operating temperature range from -150°C to +260°C. Low friction, self-lubricating properties, and good electrical insulation make them well-suited for harsh chemical, high-temperature, and cryogenic sealing applications.
Although pure PTFE provides outstanding chemical and thermal stability, it has natural limitations. It shows lower wear resistance compared to filled grades and a tendency toward cold flow (creep) under continuous high pressure. Proper gland design is essential to achieve long service life in these conditions.
For applications demanding higher wear resistance, lower creep, or improved thermal conductivity, we also offer specialized filled PTFE compounds reinforced with carbon fiber, glass fiber, graphite, or bronze.
Applications
PTFE O-Rings are designed for the most demanding sealing conditions where standard rubber products cannot meet performance requirements. With excellent chemical resistance, a wide temperature range, and low friction, they are widely used in petrochemical and chemical processing to seal corrosive acids, alkalis, and solvents in pumps, valves, and reactors. They also meet strict requirements for food (FDA), beverage, and pharmaceutical equipment, providing safe, non-contaminating sealing that supports product purity.
Teflon® O-rings perform well in heavy-duty industries, including metallurgy, mining, and construction machinery, resisting high heat, abrasion, and pressure. They are also suitable for cryogenic systems, steam lines, and hydraulic systems, offering stable, long-lasting sealing performance across the toughest industrial environments.
