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PTFE/Teflon Envelope Gaskets
Oleumfield Tech is a specialty provider of PTFE Gasket Solutions
Teflon envelope gaskets (PTFE envelope gaskets) are chemical-resistant sealing solutions designed for aggressive media and high-purity applications. These gaskets feature a PTFE (Teflon) outer layer that resists corrosion, combined with a compressible filler core such as rubber, non-asbestos, or compressed fiber for enhanced sealing performance. Ideal for flanges, heat exchangers, and piping systems, they are widely used in chemical processing, food and beverage, pharmaceutical, and petrochemical industries.
At Oleumfield Tech, we manufacture custom Teflon envelope gaskets in a variety of styles, including slit-type and milled-type envelopes, tailored to your application's pressure, temperature, and chemical exposure requirements. Our CNC precision cutting ensures tight tolerances and consistent quality, providing a long-lasting, leak-proof seal even in the most corrosive environments.
Category | Details |
|---|---|
Finish Options | Smooth, textured, skived, or bonded |
Standards Available | ASTM D4894 / D4895, ASME B16.21, FDA, MIL-SPEC, DIN |
Gasket Styles | Full face, ring, envelope, spiral wound filler, custom die or CNC cut |
Thickness Range | 0.010” to 0.250” (0.25 mm to 6.35 mm) |
FDA Compliance | Virgin and expanded PTFE are FDA, USP Class VI, and EU 10/2011 compliant |
Color Options | White (virgin), off-white (filled), custom colors for ID |
Tensile Strength | 1,500–3,500 psi |
Hardness (Shore D) | 50–65, depending on formulation |
Pressure Ratings | Up to 1,500 psi (varies by type and thickness) |
Chemical Resistance | Outstanding — resistant to almost all chemicals, solvents, acids, and bases |
Temperature Range | -328°F to 500°F (-200°C to 260°C) |
Material Types | Virgin PTFE, Expanded PTFE (ePTFE), Filled PTFE (Glass, Carbon, Bronze) |
Material Name | PTFE (Polytetrafluoroethylene), also known as Teflon® |
Industry | Usage |
|---|---|
Water Treatment | Chlorine, ozone, and chemical feed system sealing |
Aerospace | Lightweight, high-purity sealing for fuel systems and thermal insulation |
Pharmaceuticals | Non-contaminating gaskets in cleanroom and sterile processing environments |
Food & Beverage | FDA-grade PTFE for sanitary and hygienic sealing applications |
Chemical Processing | Aggressive fluid sealing, acid-resistant gaskets |
Oil & Gas | Chemical containment, corrosion-resistant flange sealing |
