Expanded PTFE Gasket Manufacturer In China

  • Customized Compressibility and Recovery Rate

  •  Efficient nesting and layout methods to reduce the gaskets’ cost

  • Production Capacity exceeds 1000 ePTFE sheets per month

  • PTFE Resins Material approval of the FDA

  • Available Types: Round|Square|Rectangle; Flat & Raised Face Flange Gasket; Ladder|Custom Made

    expanded PTFE gaskets

    High Performance Expanded PTFE Gasket

    Expanded PTFE Gaskets are cut from 100% Expanded PTFE Sheets by the laser cutter or gasket die. They are a soft, flexible material with exceptional elasticity and conformability, capable of adapting to rough, irregular, or damaged flange surfaces. They have excellent sealability, chemical resistance, and reduce creep and cold flow. With excellent characteristics, expanded PTFE gasket is widely used for distillers, piping, and equipment in industries like chemical processing, Paper, oil and gas, and food & beverage.

    A monthly production capacity of 1,000 pcs of expanded PTFE sheets ensures that we have a sufficient and reliable supply of expanded PTFE gaskets.

    PROPERTY STANDARD VALUE
    Color – White
    Density ASTM D792 0.70-0.9g/cm3
    Operating temperatures – -286 – 320°C
    Compressibility ASTM F36 45-50 %
    Recovery ASTM F36 10 -12%
    Creep Relaxation ASTM F38 35 – 36 %
    Sealability (Nitrogen) ASTM F 37B 0.15 ml/hr
    Sealability (Fuel A) ASTM F 37B 0.02 ml/hr
    Service Pressure – Full Vacuum to 19 MPa
    Tensile Strength Both directions ASTM D638 19.6 MPa

    We produce expanded PTFE gasketing sheets by ourselves, allowing us to control both quality and cost from the source. We have advanced machinery and years of experience in expanded PTFE manufacturing, utilizing more efficient nesting and layout methods to produce gaskets. Our manufacturing process is highly efficient. All these distinctive characteristics ensure that we can maintain quality while controlling costs.

    Request A Catalogue for Expanded PTFE Gasket

    You’ve come to the right place, we provide tons of expanded PTFE gasket solutions for our clients.

    Expanded PTFE Gasket Manufacturers FAQ

    Based on years of industry experience, we are well-versed with the strengths and weaknesses of every major manufacturer in the industry. Therefore, in addition to supplying our own Expanded PTFE and Braided Packing products, we also distribute a full range of sealing products.

    LongSeal ePTFE Products have FDA, ROHS, and other certifications approved by TUV, SGS. All other products are manufactured by the ISO 9001 quality system and meet or exceed industry standards.

    Based on many years of industry experience and professionalism, our prices are more favorable for the same quality grade.

    Regular-sized and material products have ample stock to ensure fast delivery. Urgent orders enjoy priority scheduling with guaranteed 24-hour turnaround

    Yes, samples are available free of charge. but we don’t bear the express cost.

    Yes, we have established lasting cooperation relationships with some customers in different countries, and we know very well the market demand & product standard of many countries

    You have 14 calendar days to return the product with the quality problem from the date you received it.

    We are always looking for motivated distributor partners! If you are interested, please contact us by mail at info@nbseals.com or complete a request form on this site with your contact information.

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    1. What’s the Expanded PTFE Gasket Manufacturing Method?

    Place the selected ePTFE microporous film roll on an unwinding machine, passing the leading end of the ePTFE microporous film through the gap between the left and right traction rollers. Under the traction of the left and right traction rollers, the ePTFE microporous film contacts the horizontal work platform. Then, the left and right traction rollers, along with the left pressure roller at the left end or the right pressure roller at the right end of the horizontal work platform, move synchronously back and forth. The pressure of the left and right pressure rollers is 0.5-2 MPa, and the temperature is 150°C-250°C. The ePTFE microporous film is layered, calendered, laid flat, and stacked on the horizontal work platform, with adhesive evenly sprayed on the upper surface of each layer for composite bonding. This continues until the desired thickness is reached. Afterward, it is left to stand on the horizontal work platform at 50-150°C for 24 hours, followed by edge trimming to produce the expanded PTFE gasket. For the detailed steps, please check our other article.

    2. Features of the Expanded PTFE Gasket

    Expanded PTFE gaskets are known for the following technical features:

    High resistance to creep and cold flow.

    Excellent chemical compatibility across a wide pH range (0-14).

    Good compressibility for easy installation and sealing.

    Soft and flexible, easily adapting to irregular flange surfaces.

    Available in various sizes, ranging from standard 1/2” to 24”, and customizable according to your requirements.

    Compliant with FDA regulations, suitable for food and pharmaceutical applications.

    3. Benefits of Using expanded PTFE gasket

    Choosing expanded PTFE gaskets offers several practical benefits in sealing applications:

    Reliable Chemical Resistance
    Expanded PTFE gaskets effectively resist corrosion from aggressive chemicals, including acids, alkalis, and solvents.

    Wide Temperature Range
    Consistently stable sealing from -200°C to +260°C, suitable for extreme operating conditions.

    Easy Installation and Maintenance
    Easy to cut, punch, and install, this simplifies maintenance procedures and reduces downtime.

    Long Service Life
    Improved sealing reliability extends the service interval, helping control maintenance costs.

    Multiple Application
    Suitable for a wide range of flange types and sealing environments.

    4. Advantages of Expanded PTFE  Gaskets

    Expanded PTFE gaskets offer several advantages, making them preferable in various industrial uses:

    1. Chemical Compatibility
    Expanded PTFE gaskets resist most industrial chemicals, making them ideal for environments involving aggressive substances.

    2. Excellent Thermal Stability
    They reliably withstand continuous thermal cycling without deformation, suited for applications in refineries, chemical plants, food processing, and pharmaceuticals.

    3. Application Versatility
    Expanded PTFE gaskets come in various densities, thicknesses, and configurations. Custom manufacturing can easily meet specific operational requirements.

    4. Non-Corrosive and Hygienic
    Non-toxic and non-reactive properties ensure safe use in sensitive industries like pharmaceutical and food production.

    5. Ease of Use and Cost Efficiency
    Their flexibility and ease of handling significantly simplify installation and replacement, reducing overall downtime.

    5.  Typical Industrial Applications of Expanded PTFE Gasket

    Common Applications

    Due to their exceptional properties, expanded PTFE gaskets are often used in:

    Chemical & Petrochemical Plants
    Sealing of reactors, pipelines, flanges, valves, and heat exchangers, preventing chemical leakage.

    Pharmaceutical & Food Industries
    FDA-approved sealing for sanitary equipment, ensuring compliance with hygiene standards.

    Oil & Gas Facilities
    Providing secure sealing in pipelines and equipment handling hydrocarbons and corrosive media.

    Water Treatment Systems
    Effective sealing in pumps, valves, and chemical dosing equipment.

    Power Generation Equipment
    Sealing solutions for turbines, compressors, and heat exchanger applications with variable temperatures and pressures.

    Mechanical & Industrial Equipment: Reliable sealing to prevent ingress of dirt, grit, moisture, and contaminants into pumps, gearboxes, and rotating machinery.

    Specific Applications:

    Pump and Gearbox Seals: Prevents water ingress and corrosion, prolonging equipment lifespan.

    Gearbox Protection: Effectively blocks sand and grit ingress, ideal for harsh environmental conditions.

    Enhanced Coupling Efficiency: Improves sealing reliability between rotating equipment and storage tanks.

    Corrosive Fluid Protection: Ensures hermetic sealing against aggressive chemical and alkaline solutions.

    6. Comparing Pure PTFE and Expanded PTFE Materials

    Pure PTFE ( Teflon):

    Solid, chemically inert material

    Temperature resistance up to 260°C

    Corrosion-resistant, minimal friction

    Non-contaminating, suitable for food processing and pharmaceuticals

    Expanded PTFE (ePTFE)
    Manufactured through the mechanical expansion of virgin PTFE

    Soft, flexible, easy-to-compress sealing material

    Excellence in resistance to creep and cold flow

    The microporous structure is beneficial for filtration and breathable sealing

    Wide use in medical, biological, and high-performance sealing applications

    Customizable for specific sealing conditions (density, thickness, hardness)

    While pure PTFE offers excellent chemical resistance, expanded PTFE provides superior sealing performance, flexibility, adaptability, and a widely applications.

    7.  Why Prefer an Expanded PTFE Gasket?

    Expanded PTFE has excellent sealability due to its multidirectional fiber structure, which performs well under high surface pressure. This structural flexibility allows expanded PTFE to conform easily to irregularities, making it suitable for sealing critical applications like oxygen-carrying systems and aggressive chemical environments.

    Moreover, expanded PTFE gaskets can be customized to meet specific performance demands, making them a highly customized sealing choice.

    Our Expertise in Expanded PTFE Gaskets

    Our team has many years of experience in manufacturing and supplying expanded PTFE  solutions. The ePTFE gasket materials are produced by us, so we can control the quality and cost well. For detailed inquiries or customized solutions in expanded PTFE gaskets, please contact us directly.