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A Non-asbestos sheet is an advanced high-performance sealing material engineered to replace traditional asbestos-based gaskets. Asbestos, once prized for its heat resistance and durability, is now known to pose severe health risks, leading to its ban in many countries. Non-asbestos sheets provide a safe, reliable, and environmentally friendly alternative without compromising on performance. These sheets are composed of synthetic fibers, such as aramid (e.g., Kevlar), glass, carbon, or mineral fibers, bonded with high-quality elastomers like NBR (Nitrile Butadiene Rubber) or SBR (Styrene Butadiene Rubber). This combination creates a versatile material capable of withstanding extreme pressure, temperature, and chemical exposure, making it indispensable in industries like oil & gas, chemical processing, power generation, and automotive manufacturing.
Kaxite Sealing specializes in manufacturing premium-grade non-asbestos sheets that meet and exceed international standards, ensuring safety, longevity, and optimal sealing efficiency for your critical applications.
Kaxite Sealing offers a comprehensive range of non-asbestos sheets tailored for different service conditions. Below are the detailed specifications for our core product lines.
| Property | Test Standard | KAX-1000 Series (Standard Grade) | KAX-2000 Series (High-Temp Grade) | KAX-3000 Series (Chemical Resistant Grade) |
|---|---|---|---|---|
| Density | ASTM F1315 | 1.6 - 1.8 g/cm³ | 1.7 - 1.9 g/cm³ | 1.8 - 2.0 g/cm³ |
| Tensile Strength (MD) | ASTM F152 | ≥ 8.0 MPa | ≥ 9.5 MPa | ≥ 7.5 MPa |
| Compression Set (%) | ASTM F36 | ≤ 25 | ≤ 20 | ≤ 30 |
| Recovery (%) | ASTM F36 | ≥ 50 | ≥ 45 | ≥ 40 |
| Stress Relaxation (%) | ASTM F38 | ≤ 15 | ≤ 12 | ≤ 18 |
| Parameter | KAX-1000 Series | KAX-2000 Series | KAX-3000 Series |
|---|---|---|---|
| Continuous Service Temperature | -50°C to +250°C (-58°F to +482°F) | -70°C to +400°C (-94°F to +752°F) | -30°C to +200°C (-22°F to +392°F) |
| Maximum Pressure | 150 Bar (2175 psi) | 200 Bar (2900 psi) | 100 Bar (1450 psi) |
| pH Range (Resistance) | 4 - 10 | 2 - 12 | 0 - 14 (Excellent for strong acids/alkalis) |
| Recommended Media | Hot/Cold Water, Steam, Air, Inert Gases, Mild Acids/Alkalis | Superheated Steam, Hot Oils, Exhaust Gases, Thermal Fluids | Strong Acids (H2SO4, HCl), Strong Alkalis (NaOH), Solvents, Fuels |
| Primary Fiber Base | Aramid / Cellulose | Aramid / Carbon / Glass | PTFE / Fluorocarbon |
| Binder Type | NBR | SBR / Special High-Temp Polymer | FKM (Fluorocarbon Elastomer) |
Q: What exactly does "non-asbestos" mean?
A: "Non-asbestos" means the material is formulated without any asbestos fibers. Asbestos is a naturally occurring silicate mineral known for its heat resistance but is a proven carcinogen. Non-asbestos sheets use modern synthetic or mineral fibers (like aramid, glass, carbon) combined with rubber binders to replicate and often surpass the sealing properties of asbestos safely.
Q: Are non-asbestos sheets as good as traditional asbestos gaskets?
A: Yes, modern high-quality non-asbestos sheets like those from Kaxite Sealing are superior in many ways. While matching the temperature and pressure resistance of asbestos, they offer better consistency, improved safety, and enhanced resistance to creep relaxation and chemical attack. They are the industry-standard replacement and are required by law in most regions.
Q: How do I choose the right grade of non-asbestos sheet for my application?
A> Selection depends on three primary factors: the fluid/media being sealed, the operating temperature, and the pressure. For general-purpose hot water, steam, or air, our KAX-1000 series is ideal. For high-temperature applications like exhausts or superheated steam, choose the KAX-2000 series. For aggressive chemicals (acids, alkalis, solvents), the KAX-3000 series with PTFE/FKM is recommended. Always consult the chemical compatibility chart and pressure/temperature ratings.
Q: What is the proper installation procedure for a gasket cut from a non-asbestos sheet?
A> Proper installation is critical for performance. Ensure flanges are clean, undamaged, and aligned. Cut the gasket to the correct size; it should fit inside the bolt circle and cover the entire sealing surface. Use a suitable lubricant on bolts. Tighten bolts in a star-pattern sequence to the manufacturer's recommended torque value. Avoid over-torquing, which can crush the gasket and cause failure. For critical applications, a re-torque after a short heat cycle is advised.
Q: Can non-asbestos sheets be used for all types of flange faces?
A> They are highly versatile and suitable for use on raised face (RF), flat face (FF), and male-female (M-F) flanges. However, surface finish is important. A serrated finish (e.g., 125-250 Ra µin) provides the best bite and seal. For very smooth or grooved surfaces, ensure the sheet grade has sufficient compressibility to fill imperfections.
Q: How does temperature affect the performance of a non-asbestos gasket?
A> Temperature directly influences the gasket's behavior. Within its rated range, the material maintains its sealing stress. Excessive heat can cause the rubber binder to harden or degrade (leading to leaks), while extreme cold can make it less flexible. Thermal cycling can cause bolt load loss. Kaxite Sealing sheets are engineered with stable binders and fibers to minimize these effects, but it is crucial to select a grade whose continuous temperature rating exceeds your maximum operating temperature.
Q: Why should I choose Kaxite Sealing non-asbestos sheets over other brands?
A> Kaxite Sealing brings decades of expertise in sealing solutions. Our non-asbestos sheets are manufactured under strict quality control, using premium raw materials. They consistently meet international standards like ASTM, DIN, and JIS. We provide detailed technical data, superior customer support, and a range tailored for specific industrial challenges, ensuring reliability, safety, and total cost-effectiveness.
Q> What certifications do Kaxite Sealing products hold?
A> Our manufacturing process and products comply with major international standards and regulations. They are certified to be asbestos-free per ISO 22285-1. Our materials are tested according to ASTM standards (F36, F38, F152, etc.). Furthermore, our quality management system is ISO 9001:2015 certified, guaranteeing consistent quality and traceability.
Q: Are there any storage conditions or shelf-life considerations?
A> To preserve material properties, store sheets in a cool, dry place away from direct sunlight, ozone sources (like electric motors), and extreme temperatures. The ideal storage temperature is between 10°C and 25°C (50°F - 77°F). Under these conditions, Kaxite Sealing non-asbestos sheets have a recommended shelf life of 5 years from the date of manufacture. Always inspect the material for dryness or cracks before use if stored for an extended period.
