Pure PTFE Gasket
Model:KXT 1300
Pure PTFE Gasket (Virgin PTFE, KXT 1300) for aggressive chemical, food, and pharmaceutical sealing. Outstanding chemical resistance, non-toxic, non-wetting, odourless. Working temperature -200°C to +260°C, dielectric strength 55 kV/mm. Available in ring type and full-face type, ASME B16.5 / EN 1092-1 / DIN / JIS standards. Custom sizes CNC machined to drawing.
Pure PTFE Gasket Manufacturer & Supplier in China
Kaxite KXT 1300 Pure PTFE Gasket (Virgin PTFE) is a chemically inert, high-purity sealing gasket designed for aggressive chemical, food, pharmaceutical, and high-purity applications. It is machined by CNC or molded to standard or custom dimensions, and manufactured in an ISO 9001 certified facility.
Pure PTFE offers outstanding chemical resistance to almost all industrial chemicals, a wide working temperature range from -200°C to +260°C, excellent electrical and thermal insulation, and low water absorption. Available in standard flange sizes (ASME B16.5, EN 1092-1, DIN, JIS) and custom shapes per drawing.
Pure PTFE Gasket (Virgin PTFE) — chemically inert sealing gasket for aggressive media and high-purity applications
Why Buyers Choose Pure PTFE Gaskets
Universal Chemical Resistance
Resistant to almost all industrial chemicals, acids, bases, solvents, and oxidizers — except molten alkali metals and fluorine at high temperatures.
Wide Temperature Range
Continuous working temperature from -200°C to +260°C, with a melting point of 330°C and short-term tolerance up to 390°C.
Food & Pharmaceutical Grade
Non-toxic, odourless, non-contaminating, and non-wetting. Ideal for food processing, dairy, beverage, and pharmaceutical pipelines.
Excellent Electrical Insulation
Dielectric strength of 55 kV/mm makes Pure PTFE gaskets suitable for electrical and electronic equipment flange insulation.
Low Water Absorption
Water absorption below 0.01% ensures dimensional stability and long-term sealing reliability in wet or humid environments.
CNC or Molded Production
Produced by precision CNC machining or compression molding, with standard and custom sizes available to drawing.
Typical Applications
Product Types: Standard & Custom PTFE Gaskets
Kaxite produces a full range of PTFE gaskets. Pure (virgin) PTFE gaskets are the focus of this page; related variants are available on request. The table below helps buyers select the right product before requesting a quote.
Pure PTFE Gasket (Virgin PTFE) — KXT 1300
100% virgin PTFE, no fillers. Maximum chemical resistance, best for food, pharmaceutical, and high-purity chemical service.
Full-Face PTFE Gasket
Full-face design with bolt holes, for flat-face flanges. Protects the entire flange face and provides uniform bolt load distribution.
Ring Type PTFE Gasket
Inner-bolt-circle ring design, for raised-face flanges. Saves material and fits standard raised-face flange dimensions.
PTFE Envelope Gasket (Related)
PTFE envelope over a compressed non-asbestos or rubber core. Combines PTFE chemical resistance with elastic core recovery. Available separately.
Expanded PTFE Gasket (Related)
Expanded (ePTFE) structure with high compressibility and creep resistance. Ideal for irregular or damaged flange faces. Available separately.
Modified / Filled PTFE Gasket (Related)
PTFE with glass, carbon, graphite, or bronze filler for improved creep resistance and thermal conductivity. Available separately.
Pure PTFE Gasket — CNC machined and compression molded types available
Technical Properties of Pure PTFE Gasket
The following data are typical values for Kaxite KXT 1300 Pure PTFE Gasket. Actual performance depends on flange condition, bolt load, media, and operating temperature.
| Property | Unit | Typical Value |
| Density | kg/m³ | 2200 – 2300 |
| Tensile Strength | MPa | 15.0 |
| Ultimate Elongation (min) | % | 150 |
| Working Temperature | °C | -200 to +260 |
| Melting Point | °C | 330 |
| Max. Production Temperature | °C | 390 |
| Compressive Strength (1% deformation) | N/mm² | 400 – 450 |
| Elongation at Break | % | 210 – 400 |
| Hardness | Shore D | 50 – 60 |
| Water Absorption | % | 0.01 |
| Dielectric Strength (short-time, air, t = 0.5 mm) | kV/mm | 55 |
Buyer note: Pure PTFE gaskets have limited elasticity and are subject to cold flow (creep) under sustained load. For high-pressure or high-temperature service, consider PTFE envelope or expanded PTFE gaskets, or use disc spring washers on bolts to maintain load. Contact our engineers for application-specific recommendations.
Available Sizes, Standards, and Customization
- Standard flange sizes: ASME B16.5, EN 1092-1, DIN, JIS, BS
- Ring type and full-face type available
- Typical thickness: 1.0 mm, 1.5 mm, 2.0 mm, 3.0 mm, 5.0 mm; other thicknesses on request
- Custom sizes and shapes produced by CNC machining to drawing
- Virgin PTFE grade for food and pharmaceutical service (FDA-compliant raw material available)
- Sheet, rod, tube, and machined parts available as related PTFE products
Why Choose Kaxite Sealing
Ningbo Kaxite Sealing Materials Co., Ltd. is a professional sealing materials manufacturer and supplier in China, serving chemical, food, pharmaceutical, and general industrial customers worldwide. Kaxite operates an ISO 9001 certified quality management system across all production processes, with CNC machining and molding capability in-house.
- ISO 9001 certified: Quality management system applied to raw material incoming, production, and final inspection.
- Virgin PTFE grade: 100% pure PTFE resin, no fillers, suitable for food, pharmaceutical, and high-purity chemical service.
- CNC & molded production: Both precision CNC machining and compression molding in-house for flexible order sizes.
- Custom sizes: Standard flange sizes and custom dimensions produced to drawing or sample.
- Fast response: Technical sales team responds within 2 business hours for urgent inquiries.
What to Include in Your Inquiry
To quote accurately and quickly, please provide the following information:
- Product: Pure PTFE Gasket (Virgin PTFE, KXT 1300) or specify related type
- Flange size and standard (e.g., DN, PN, Class, ASME, EN, DIN, JIS)
- Gasket type: ring type or full-face type
- Thickness requirement (mm or inch)
- Operating temperature and pressure
- Process media (chemical, food, pharmaceutical, water, etc.)
- Quantity and delivery target
- Any certification requirement (FDA, material certificate, etc.)
Need a Factory Quote or Technical Recommendation?
Send us your flange size, standard, thickness, and process media. Our sealing engineer will reply within 2 business hours.
Send Inquiry / Request a Quote Download PDF Datasheet Chat on WhatsAppFAQ: Pure PTFE Gasket
What is a Pure PTFE Gasket?
It is a gasket made from 100% virgin PTFE (polytetrafluoroethylene) resin, without any fillers or additives. It provides the highest chemical resistance and purity of all PTFE gasket types, and is typically machined by CNC or produced by compression molding.
What is the working temperature range of Pure PTFE Gasket?
The continuous working temperature range is from -200°C to +260°C. The melting point of PTFE is approximately 330°C, and it can withstand short-term exposure up to 390°C. For higher temperatures, graphite or spiral wound gaskets are recommended.
What is the difference between Pure PTFE and filled PTFE?
Pure PTFE contains no fillers and offers the best chemical resistance and purity. Filled PTFE (modified PTFE) contains glass, carbon, graphite, or bronze filler to improve creep resistance, thermal conductivity, or wear resistance, but with slightly reduced chemical resistance. Selection depends on pressure, temperature, and media.
Is Pure PTFE suitable for food and pharmaceutical applications?
Yes. Pure PTFE is non-toxic, odourless, non-contaminating, and non-wetting, making it ideal for food processing, dairy, beverage, and pharmaceutical pipelines. FDA-compliant virgin PTFE raw material is available on request.
What sizes and standards are available?
Standard flange sizes in ASME B16.5, EN 1092-1, DIN, JIS, and BS are available. Both ring type and full-face type are produced. Custom sizes and shapes are CNC machined to drawing. Typical thicknesses are 1.0 mm, 1.5 mm, 2.0 mm, 3.0 mm, and 5.0 mm.
Does Pure PTFE gasket suffer from cold flow or creep?
Yes. Pure PTFE has limited elasticity and is subject to cold flow (creep) under sustained load, especially at elevated temperatures. For high-pressure or high-temperature applications, consider PTFE envelope gaskets or expanded PTFE gaskets, or use disc spring washers on bolts to maintain load. Contact our engineers for recommendations.
What information is needed for a quotation?
Please provide the flange size and standard, gasket type (ring or full-face), thickness, operating temperature and pressure, process media, quantity, and any certification requirement. A drawing or sample helps us confirm faster.
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Address
No. 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China
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Share your sealing requirement and our technical sales team will respond within 24 business hours. For fastest service, include your flange specification, operating pressure, temperature, and process media in the message below.
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