Kaxite Sealing: Your Premier Partner for High-Performance Graphite Solutions
In the demanding world of industrial sealing and thermal management, the choice of material is paramount. For over two decades, Kaxite Sealing has been at the forefront, engineering and supplying premium-grade Graphite Sheet materials that define reliability and excellence. Our products are not just components; they are critical solutions that enhance the performance, safety, and longevity of your machinery and processes.
A Graphite Sheet, often referred to as flexible graphite or expanded graphite sheet, is a versatile sealing material manufactured from pure natural graphite. Through a process of chemical and thermal expansion, the graphite flakes expand, forming a flexible, worm-like structure that is then compressed into sheets without the use of binders. This unique manufacturing process yields a material with an exceptional combination of properties, making it indispensable in countless high-temperature and high-pressure applications across industries such as chemical processing, power generation, automotive, aerospace, and semiconductor manufacturing.
Why Choose Kaxite Sealing Graphite Sheets?
Our commitment at Kaxite Sealing is to deliver products that exceed industry standards. Our graphite sheets are characterized by:
- Exceptional Thermal Conductivity: Efficiently dissipates heat, preventing hotspots and ensuring operational stability.
- Superior Chemical Inertness: Resists corrosion from a vast majority of acids, alkalis, and organic solvents.
- Outstanding Sealing Performance: Conforms easily to flange faces, creating a reliable, leak-tight seal even under low bolt loads.
- Wide Temperature Range: Performs consistently from cryogenic temperatures up to 3000°F (1650°C) in non-oxidizing atmospheres.
- Inherent Flexibility & Compressibility: Accommodates uneven flange surfaces and thermal cycling without losing sealing integrity.
- High Purity: Our manufacturing ensures minimal ash content, reducing the risk of contamination in sensitive processes.
Kaxite Sealing Graphite Sheet: Detailed Product Specifications
To ensure you select the perfect material for your application, we offer a range of graphite sheets with varying densities, thicknesses, and optional reinforcements. Below are our standard product specifications.
Standard Material Properties
| Property | Test Method | Typical Value | Unit |
|---|---|---|---|
| Density Range | ASTM F1314 | 0.7 - 1.3 | g/cm³ |
| Temperature Limit (Inert Atmosphere) | - | Up to 3000 | °F |
| Temperature Limit (Oxidizing Atmosphere) | - | Up to 900 | °F |
| Thermal Conductivity (Through-plane) | ASTM E1461 | 5 - 10 | W/m·K |
| Compression Set | ASTM F36 | < 15 | % |
| Recovery | ASTM F36 | > 40 | % |
| Carbon Content | ASTM D5616 | > 99 | % |
| Tensile Strength | ASTM F152 | 4.0 - 8.0 | MPa |
Standard Size & Configuration Chart
| Standard Thickness | Available Width | Standard Sheet Size | Core Reinforcement Options |
|---|---|---|---|
| 0.25mm (0.010") | Up to 1500mm (59") | 1250mm x 1250mm (49" x 49") Custom sizes available |
None (Pure Graphite) |
| 0.5mm (0.020") | Stainless Steel Tanged/Perforated | ||
| 1.0mm (0.040") | Stainless Steel Foil Laminate | ||
| 1.5mm (0.060") | Inconel Foil Laminate | ||
| 2.0mm (0.080") | Carbon Fiber Insert |
Frequently Asked Questions (FAQ) About Graphite Sheets
Q: What is the primary difference between a graphite sheet and a traditional compressed non-asbestos (CNA) gasket?
A: The primary differences lie in material composition, temperature resistance, and chemical compatibility. Graphite sheets are made from nearly pure carbon, allowing them to withstand much higher temperatures (up to 3000°F in inert gases vs. typically 500°F for CNA). They are also chemically inert to a wider range of media. While CNA gaskets often contain elastomeric binders that can degrade, graphite sheets are binder-free, offering superior resilience and creep resistance over long-term thermal cycling.
Q: Can Kaxite Sealing graphite sheets be used in food, pharmaceutical, or ultra-pure applications?
A: Absolutely. We offer specific high-purity grades of graphite sheet that are manufactured and handled in controlled environments to minimize contamination. These grades feature extremely low chloride and sulfur content and meet stringent cleanliness standards required for FDA, USP Class VI, and semiconductor industry applications. It is crucial to specify your purity requirements when inquiring.
Q: When should I consider using a reinforced graphite sheet?
A: Reinforcement, such as stainless steel tanged metal or foil lamination, is recommended for several scenarios: 1) For handling in large diameters or thin sheets where increased tensile strength and handling durability are needed. 2) In high-pressure applications (> 1000 psi) where blow-out resistance is critical. 3) For applications involving severe cycling or vibration, where the reinforcement helps maintain gasket integrity and prevents material breakup.
Q: How do I determine the correct density and thickness for my flanged connection?
A: Selection depends on flange conditions and service parameters. For standard ANSI B16.5 flanges with serrated finishes, a density of 1.0-1.1 g/cm³ and a thickness of 1.5mm is a common starting point. Lower density (0.8 g/cm³) sheets offer higher compressibility for uneven or worn flanges. Thinner sheets (0.5mm) are suitable for heat exchangers or confined spaces. For specific guidance, provide Kaxite Sealing with your flange rating, surface finish, bolt load, and media/temperature details for a tailored recommendation.
Q: Are graphite sheets electrically conductive?
A: Yes, graphite is an excellent conductor of electricity. This property is beneficial for applications requiring electromagnetic interference (EMI) shielding or electrical grounding across a joint. However, it also means that graphite gaskets should NOT be used as an electrical insulator. If electrical isolation is required, alternative non-conductive materials should be selected.
Q: What are the storage and handling best practices for graphite sheets?
A: Store sheets in a cool, dry place away from direct sunlight and moisture. Keep them in their original packaging until use to prevent contamination from dust or oils. While graphite is not hygroscopic, prolonged exposure to humid environments is not advised. Use clean gloves when handling to prevent skin oils from affecting the material. For cut gaskets, store them flat or hung vertically to prevent deformation.
Q: Can I reuse a graphite sheet gasket after disassembly?
A: It is generally not recommended to reuse a graphite sheet gasket. Upon initial compression, the graphite flows and conforms to the specific imperfections of the flange faces. During disassembly, this tailored seal is disturbed, and the material may have undergone compression set. Reusing it can lead to a significant increase in the risk of leakage. For reliable performance and safety, always install a new, unused gasket from Kaxite Sealing.
Applications of Kaxite Sealing Graphite Sheets
The versatility of our graphite sheets makes them suitable for a vast array of sealing and thermal interface applications. Key industries and uses include:
- Chemical & Petrochemical: Heat exchanger gaskets, reactor manways, valve bonnets, pump seals, and pipe flanges handling aggressive chemicals.
- Power Generation: Exhaust duct seals in gas turbines, boiler manways, and flue gas desulfurization system gaskets.
- Automotive & Aerospace: Exhaust manifold gaskets, turbocharger seals, and high-temperature engine compartment shielding.
- Semiconductor & Vacuum Furnaces: High-purity furnace gaskets, wafer processing equipment seals, and vacuum chamber seals.
- General Industrial: Compressor seals, hydraulic system flanges, and as a thermal interface material (TIM) for electronic heat sinks.
Partner with Kaxite Sealing for Unmatched Expertise
Choosing Kaxite Sealing means more than just purchasing a product; it means gaining a technical partner dedicated to your success. Our team of engineers provides unparalleled application support, from material selection and design consultation to troubleshooting. We offer custom die-cutting, slitting, and fabrication services to deliver ready-to-install gaskets and shapes that meet your exact specifications, reducing waste and installation time. Trust in our 20-year legacy of quality and innovation to provide the sealing solution that your critical application demands.
