Wholesale Carbon Fiber Packing from Manufacturers in China

Carbon Fiber packing is a high-performance sealing solution engineered for extreme conditions. Unlike traditional materials, it leverages the exceptional strength, chemical resistance, and thermal stability of carbon fibers to create a reliable seal in demanding industrial applications. At Kaxite, we specialize in manufacturing premium-grade carbon fiber packing that meets the rigorous standards of modern engineering. Our products are designed to minimize downtime, reduce maintenance costs, and enhance operational safety across various sectors, including chemical processing, oil and gas, power generation, and marine industries. The core advantage of Kaxite Carbon Fiber Packing lies in its unique material composition and advanced braiding technology. We utilize high-modulus carbon fibers, often combined with complementary materials like PTFE or graphite, to create a packing that exhibits superior performance characteristics. **Key Material Properties:** * **Exceptional Tensile Strength:** Withstands high gland pressures without extruding or degrading. * **Outstanding Chemical Inertness:** Resistant to a wide range of corrosive chemicals, acids, and solvents. * **Excellent Thermal Conductivity:** Dissipates heat quickly from the shaft, preventing overheating. * **Low Coefficient of Friction:** Reduces shaft wear and requires less torque for adjustment. * **Self-Lubricating:** Certain formulations contain inherent lubricants for smooth operation. * **Non-Contaminating:** Ideal for applications requiring product purity. To provide a clear and professional overview, here are the detailed specifications for standard Kaxite Carbon Fiber Packing. Custom formulations are also available. ### **Kaxite Carbon Fiber Packing: Technical Specifications & Data** **Physical & Mechanical Properties Table** | Property | Test Method | Unit | Value Range (Typical) | | :--- | :--- | :--- | :--- | | **Density** | ASTM D3800 | g/cm³ | 1.6 - 2.0 | | **Tensile Strength** | ASTM D885 | MPa | 3500 - 5000 | | **Temperature Range** | Continuous | °C / °F | -200 to +350 / -328 to +662 | | **pH Range** | Continuous | -- | 0 - 14 | | **Thermal Conductivity** | ASTM E1461 | W/m·K | 50 - 120 | | **Coefficient of Friction** | ASTM D1894 | -- | 0.08 - 0.15 | | **Compression Recovery** | ASTM F36 | % | ≥ 85 | **Standard Product Line Specifications** | Kaxite Product Code | Fiber Type | Impregnation | Braid Style | Size Range (Inch) | Primary Application | | :--- | :--- | :--- | :--- | :--- | :--- | | **KX-CF100** | PAN-based Carbon | PTFE Emulsion | Square Braid | 1/8" to 1" | General chemical service, pumps, valves | | **KX-CF200** | Pitch-based Carbon | Graphite Powder | Square Braid | 3/16" to 3/4" | High-temperature pumps, agitators | | **KX-CF300** | PAN-based Carbon | PTFE & Graphite | Twisted Braid | 1/4" to 1/2" | High-speed rotary equipment | | **KX-CF400** | Hybrid Carbon | Special Polymer | Interlock Braid | 3/8" to 5/8" | Severe chemical duty, abrasive slurries | **Chemical Resistance Guide (Selected Media)** | Chemical Media | Concentration | Resistance Rating | Notes | | :--- | :--- | :--- | :--- | | **Sulfuric Acid** | Up to 98% | Excellent | KX-CF200/400 recommended | | **Sodium Hydroxide** | Up to 50% | Excellent | Suitable for all grades | | **Chlorine Gas** | Wet & Dry | Excellent | KX-CF400 recommended | | **Ammonia** | All Concentrations | Excellent | -- | | **Hydrocarbons** | (Crude Oil, Fuels) | Excellent | -- | | **Hot Water/Steam** | -- | Excellent | Up to saturated steam conditions | ### **Application Guidelines and Installation Best Practices** Proper selection and installation are critical to achieving the full lifespan and performance of carbon fiber packing. Follow these guidelines for optimal results. 1. **Shaft/Stem Preparation:** Ensure the shaft or stem is clean, smooth, and free of nicks or corrosion. A surface finish of 16-32 microinches Ra is recommended. 2. **Packing Ring Installation:** * Always use clean tools. * Cut rings using a sharp blade on a mandrel of the exact shaft diameter. Ensure a clean, square cut. * Stagger the ring joints by 90 degrees with each subsequent ring. * Avoid twisting or over-stretching the rings during installation. 3. **Gland Adjustment:** * After installation, tighten the gland nuts finger-tight. * Start the equipment and gradually tighten the gland in 1/6-turn increments until a slight leakage (a few drops per minute) is observed for run-in. * Allow a 2-4 hour run-in period. Re-tighten only if leakage is excessive. The goal is a minimal, cooling leak. 4. **Maintenance:** Periodically check the gland adjustment. Repacking is typically required when adjustment no longer controls leakage. ### **Carbon Fiber Packing: Frequently Asked Questions (FAQ)** **Q: What are the main advantages of carbon fiber packing over traditional asbestos or aramid fiber packing?** A: Carbon fiber packing offers superior chemical resistance across a broader pH range, higher thermal conductivity which reduces heat buildup at the shaft, and greater strength for longer service life in high-pressure applications. It is also non-toxic and more environmentally friendly compared to asbestos. **Q: Can Kaxite Carbon Fiber Packing be used in food and pharmaceutical applications?** A: Yes, specific grades like our KX-CF100 with FDA-approved PTFE impregnation are suitable for applications requiring sanitary standards and product purity. It is non-contaminating and chemically inert. **Q: How do I select the correct Kaxite product grade for my specific pump or valve?** A: Selection depends on four key factors: the fluid media (chemical compatibility), operating temperature, pressure/speed (PV value), and equipment type (rotary, reciprocating). Refer to our chemical resistance chart and product specification tables. For complex applications, contact Kaxite engineering support with your operational parameters. **Q: What is the expected service life of carbon fiber packing?** A: Service life varies greatly based on application severity, installation, and adjustment. In standard chemical pump service with proper maintenance, Kaxite packing typically lasts 6 to 18 months, significantly longer than many conventional packings, reducing frequency of replacement and total cost of ownership. **Q: Is special lubrication required during installation or operation?** A: Most Kaxite carbon fiber packings are pre-impregnated with lubricants (PTFE, graphite) and are self-lubricating during operation. No additional lubrication is required or recommended for standard services. For extremely dry or abrasive services, a minimal amount of compatible grease may be used during installation. **Q: How does carbon fiber packing perform with abrasive slurries?** A: Standard carbon fiber packing can be worn by highly abrasive media. For such applications, Kaxite offers specialized grades like the KX-CF400, which features a hybrid fiber construction and enhanced impregnation designed to resist abrasion and extend life in slurry services. **Q: Can this packing be used in high-speed rotary applications?** A: Absolutely. Grades like KX-CF300, with a twisted braid and optimized lubrication, are specifically engineered for high-speed rotary equipment. Their low friction coefficient and excellent heat dissipation prevent shaft scoring and packing burnout. **Q: What temperature limits should I observe?** A: The continuous operating temperature range for standard Kaxite Carbon Fiber Packing is -200°C to +350°C. Intermittent peaks can be higher. It is crucial to select a grade where the impregnation material (e.g., PTFE, polymer) is also rated for your operating temperature. **Q: How do I store Kaxite packing materials?** A: Store in a cool, dry place away from direct sunlight, extreme temperatures, and contaminants. Keep the packing in its original packaging until use to prevent absorption of moisture or dust. **Q: My application involves strong oxidizing agents. Is carbon fiber packing suitable?** A: Carbon fibers themselves have excellent resistance to many oxidizers. However, the impregnating material must also be compatible. For services with strong oxidizers like concentrated nitric acid or hydrogen peroxide, please consult directly with Kaxite technical support for a grade-specific recommendation.