In the demanding world of industrial sealing, reliability and durability are non-negotiable. Mineral Fiber Packing, a high-performance sealing solution, stands out for its exceptional resistance to extreme temperatures, corrosion, and pressure. At Kaxite Sealing, we have refined this technology over decades, engineering our packing to meet the rigorous challenges of modern industry. Unlike generic alternatives, Kaxite's Mineral Fiber Packing is manufactured using a proprietary blend of selected mineral fibers and reinforced with high-grade lubricants and corrosion inhibitors. This results in a robust, long-lasting seal that minimizes downtime, reduces maintenance costs, and ensures operational safety in applications ranging from pumps and valves to reactors and exhaust systems. Choosing Kaxite means investing in a sealing partner committed to quality, innovation, and your equipment's longevity.
To ensure optimal selection and performance, please refer to the detailed technical specifications of Kaxite Sealing's standard Mineral Fiber Packing series below. Custom formulations are available for specific applications.
| Parameter | Specification / Value | Test Standard | Notes |
|---|---|---|---|
| Material Composition | High-Purity Mineral Fibers (Rockwool/Basalt), Inorganic Binders, High-Temp Lubricants, Corrosion Inhibitors | Kaxite Internal QC | Proprietary blend; asbestos-free |
| Temperature Range | -100°C to +600°C (Continuous); Up to 800°C (Peak/Intermittent) | ASTM D2596 | Exact range may vary by specific grade |
| pH Range | 1 - 14 | N/A | Suitable for most acidic & alkaline media |
| Density | 1.8 - 2.2 g/cm³ | ASTM D3800 | Provides optimal balance of sealing and flexibility |
| Tensile Strength | > 15 MPa | ASTM D2256 | Ensures structural integrity during installation |
| Compression Set | < 20% @ 25°C, 24h | ASTM F36 | Indicates excellent recovery and sealing force retention |
| Thermal Conductivity | 0.05 - 0.07 W/m·K @ 200°C | ASTM C518 | Low conductivity provides good thermal insulation |
| Available Sizes (Square Section) | 3mm, 5mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 19mm, 22mm, 25mm | N/A | Other rectangular or round sections available on request |
| Standard Packing | Coils of 5kg, 10kg, 25kg; Boxed lengths of 3m, 5m, 10m | N/A | Bulk packaging options available for OEM clients |
| Standard Colors | White, Gray, Beige | N/A | Color coding available for grade identification |
| Product Grade | Primary Reinforcement / Additive | Ideal For | Max Temp (°C) |
|---|---|---|---|
| KX-MF Standard | Graphite Lubricant | General purpose pumps, valves, hot water & steam services | 550 |
| KX-MF HS (High Strength) | Inorganic Fiber Braid | Agitators, mixers, high-pressure boiler feed pumps | 600 |
| KX-MF CR (Corrosion Resistant) | PTFE & Special Inhibitors | Strong acids (H2SO4, HCl), alkalis, chemical process pumps | 280 |
| KX-MF HT (High Temperature) | Enhanced Silicate Binders | Exhaust flanges, incinerators, pyrolysis units, furnace doors | 800 |
Our packing is engineered for versatility across multiple sectors. Its unique properties make it the seal of choice for challenging environments.
Q: How does Mineral Fiber Packing differ from other high-temperature packings like graphite or ceramic fiber?
A: While graphite offers excellent lubricity and ceramic fibers provide very high temperature resistance, Kaxite Sealing's Mineral Fiber Packing strikes a superior balance. It combines good inherent lubricity with exceptional chemical resistance across a broader pH range than graphite, and it is typically more resilient and easier to install than brittle ceramic fiber packings. Its compression recovery is often better, making it more forgiving in dynamic applications with runout or pressure cycling.
Q: What is the proper procedure for installing Mineral Fiber Packing into a pump or valve?
A: Correct installation is critical for performance and longevity. Clean the stuffing box thoroughly. Cut the Kaxite packing rings on a clean surface using a sharp blade, ensuring the ends are cut squarely. Stagger the ring joints by 90 degrees as you install each ring. Use a proper stuffing tool to tamp each ring firmly and evenly. For the final adjustment, tighten the gland gradually after the equipment has reached operating temperature and pressure, allowing just a minimal leakage (a few drops per minute) for initial lubrication. Never overtighten on cold start-up.
Q: Can Kaxite Mineral Fiber Packing be used in food-grade or potable water applications?
A: Our standard grades are not certified for direct food contact or potable water. However, Kaxite Sealing can supply specialized, FDA-compliant inert formulations upon request. These use ultra-pure mineral fibers and approved lubricants. Always specify your requirement for food or pharmaceutical applications during inquiry.
Q: How do I select the correct size and grade for my application?
A: Selection depends on four key factors: 1) Equipment Type & Size: Measure the shaft/stem diameter and stuffing box depth to determine packing cross-section and length. 2) Operating Conditions: Note the exact media, its concentration, temperature (both operating and peak), and pressure. 3) Equipment Dynamics: Consider shaft speed (RPM) and any runout. 4) Regulatory Needs: Confirm if any industry-specific certifications are required. Our KX-MF Standard grade is a great starting point for general high-temp service. For aggressive chemicals, choose KX-MF CR. For extreme heat over 600°C, specify KX-MF HT. Our technical team is always available to assist with selection.
Q: What maintenance practices extend the life of Mineral Fiber Packing?
A: Proactive maintenance significantly extends seal life. Monitor gland leakage regularly; a steady increase may indicate packing wear and the need for slight gland adjustment. Avoid letting the packing run completely dry, as the internal lubricant can deplete over time. For equipment in cyclic service, re-tightening the gland when the system returns to operating temperature is advisable. During shutdowns, inspect the packing for signs of hardening, cracking, or excessive wear. Keeping external contaminants (dirt, grit) away from the stuffing box area also prevents abrasive wear.
Q: Is this packing suitable for high-speed rotary equipment?
A: Kaxite Mineral Fiber Packing is generally recommended for low to moderate shaft speeds (typically below 10 m/s surface speed). For very high-speed rotary applications, mechanical seals or specialized high-speed braided packings may be more optimal. However, our KX-MF HS grade, with its reinforced braid for added strength, performs well in many demanding rotary services like agitators and mixers. Consultation with our engineers is recommended for high-RPM applications.
Q: How does Kaxite ensure consistent quality in its Mineral Fiber Packing?
A: At Kaxite Sealing, quality is engineered into every step. We start with rigorously tested raw materials from certified suppliers. Our proprietary manufacturing process is controlled via automated systems for consistency in fiber blending, braiding density, and lubricant impregnation. Every production batch undergoes a suite of tests, including density, tensile strength, chemical analysis, and high-temperature cycling tests. This commitment to quality control ensures that every coil of Kaxite packing you receive delivers reliable, predictable, and long-lasting performance.
Kaxite Sealing is more than a supplier; we are a solutions partner. We understand that standard products may not always fit unique challenges. Our engineering team is equipped to develop customized Mineral Fiber Packing formulations. Whether you need a specific size not listed in our standard catalog, a unique color for identification, a special lubricant package for ultra-low friction, or a formulation to handle an unusual chemical mixture, we have the expertise to collaborate on a solution. Contact our technical sales department with your application details, including equipment drawings, process parameters, and performance expectations, to initiate a custom product development discussion. For standard orders, refer to our product grade tables and size list to specify your requirements clearly.
Copyright © 2015-2025 Ningbo Kaxite Sealing Materials Co., Ltd. All Rights Reserved.
