In industrial sealing, the shift from traditional asbestos-based materials to safer, high-performance alternatives represents a significant technological advancement. Non-asbestos gaskets are engineered sealing solutions designed to provide robust containment and sealing integrity without the health and environmental hazards associated with asbestos. These gaskets are manufactured from a blend of synthetic fibers, such as aramid, glass, carbon, or cellulose, bound together with high-quality elastomers like NBR, SBR, or fluoroelastomers. The resulting composite materials offer exceptional resistance to heat, pressure, and a wide range of aggressive media, including oils, fuels, solvents, steam, and many chemicals. At Kaxite Sealing, we specialize in the development and production of premium non-asbestos gasket sheets and custom-cut gaskets that meet the rigorous demands of modern industries like oil & gas, chemical processing, power generation, marine, and automotive applications. Our commitment is to deliver sealing reliability that ensures operational safety, environmental compliance, and long-term cost efficiency for our global clientele.
The performance of a non-asbestos gasket is defined by its precise formulation and physical properties. Below are the key parameters that specify our material grades.
| Property / Test Method | KX-NAF 1000 (Standard Grade) | KX-NAF 2000 (Oil & Fuel Resistant) | KX-NAF 3000 (High-Temp/Steam) | KX-NAF 4000 (Chemical Resistant) |
|---|---|---|---|---|
| Density (g/cm³) | 1.6 - 1.8 | 1.7 - 1.9 | 1.8 - 2.0 | 1.7 - 1.9 |
| Tensile Strength (MPa) ASTM F152 | ≥ 8.0 | ≥ 9.0 | ≥ 10.0 | ≥ 8.5 |
| Compression Set (%) ASTM F36 | ≤ 35 | ≤ 30 | ≤ 25 | ≤ 30 |
| Recovery (%) ASTM F36 | ≥ 50 | ≥ 55 | ≥ 60 | ≥ 55 |
| Temperature Range | -40°C to +200°C | -30°C to +250°C | -40°C to +400°C | -20°C to +300°C |
| pH Range | 2 - 12 | 2 - 12 | 1 - 14 | 0 - 14 (varies by chemical) |
| Fluid Resistance | Water, Mild Chemicals | Oils, Fuels, Aliphatic Hydrocarbons | Steam, Hot Water, Thermal Fluids | Acids, Alkalis, Solvents, Aggressive Chemicals |
The versatility of non-asbestos gaskets makes them suitable for countless sealing challenges. Kaxite Sealing's products are specified by engineers and maintenance professionals in the following sectors:
Selecting Kaxite Sealing translates into measurable benefits for your operation:
Q: What exactly are non-asbestos gaskets made of?
A: Non-asbestos gaskets are composite materials made from organic or inorganic synthetic fibers (such as aramid, glass, or cellulose) as a reinforcement, bound together by an elastomeric matrix (like NBR or SBR rubber). This combination replicates and often exceeds the sealing performance of traditional asbestos-based materials without any associated health risks. Kaxite Sealing uses advanced formulations to tailor the fiber type, binder, and fillers for specific application needs.
Q: Are non-asbestos gaskets as good as the old asbestos gaskets?
A: Yes, modern high-quality non-asbestos gaskets are not just a substitute but an improvement. They offer comparable or superior temperature and pressure ratings, excellent chemical resistance, and better creep relaxation properties. Furthermore, they are safer to handle, cut, and dispose of. Kaxite Sealing's grades are engineered to meet or exceed the performance specifications historically fulfilled by asbestos materials.
Q: How do I select the right grade of non-asbestos gasket for my application?
A: Selection depends on three primary factors: the fluid/media being sealed, the operating temperature, and the pressure. First, identify the chemical compatibility required. Then, ensure the material's temperature range covers both operating and potential upset conditions. Finally, verify that the material's pressure rating is suitable. Consulting Kaxite Sealing's technical datasheets or contacting our engineering team is recommended for critical applications.
Q: Can Kaxite non-asbestos gaskets be used for high-temperature steam service?
A: Absolutely. Our KX-NAF 3000 series is specifically designed for high-temperature and steam applications, with a continuous service temperature up to 400°C (752°F). It features a special fiber reinforcement and binder system that provides excellent resistance to steam blow-out and maintains seal integrity under thermal cycling.
Q: What is the shelf life of non-asbestos gasket sheets?
A: When stored properly in a cool, dry place away from direct sunlight, ozone, and heat sources, Kaxite Sealing non-asbestos gasket materials typically have a shelf life of 5 years from the date of manufacture. The material should be stored flat, not on its edge, to prevent deformation.
Q: How should I calculate the bolt load/torque for installing a non-asbestos gasket?
A: Installation torque is critical for an effective seal. It is not solely a property of the gasket but a system calculation involving flange type (raised face, flat face), flange material, bolt grade, and the gasket's stress-to-seal characteristics. Kaxite Sealing provides recommended seating stress values (in MPa or psi) for each material grade. It is best practice to follow standards like ASME PCC-1 or EN 1591 and consult with a flange design specialist for critical joints.
Q: Do you provide custom-cut gaskets, and what information is needed for a quote?
A: Yes, Kaxite Sealing offers full custom cutting services. To provide an accurate quote, we typically require a detailed drawing (DWG, DXF, or PDF) with all dimensions, the required material grade (e.g., KX-NAF 2000), the thickness, the quantity needed, and any special requirements like adhesive backing or packaging. For standard flanges, providing the flange standard (e.g., ANSI 150#), size (NPS), and facing type is sufficient.
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