High-performance -200 ~ +300℃ aramid fiber packing
Aramid fiber packing is manufactured by aramid fibers treated with lubricants such as polytetrafluoroethylene emulsion, then forming squarecross-section packing rings through precision diagonal braiding. The filleris known as "steel wire” forits strength and modulus, it withstands harsh media and high pressure with extended service life and superior sealingintegrity in demanding applications such as pulp mils, slurry pumps, tin mining operations, and power plant services.
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As a leading sealing material manufacturer, Hebei Xinda provides premium aramid fiber packing designed for the toughest industrial environments. Also known as Kevlar packing, our product is braided from high-strength aramid yarns impregnated with PTFE lubricant. This specialized aramid fiber packing is engineered to handle abrasive media, high pressures, and high velocities where standard packing materials fail.
Aramid Fiber Packing Data Sheet
| Test Item | Unit | Target |
| Temperature | ℃ | -200 ~ +300 |
| Pressure | Mpa | 20-30 |
| Loss on Ignition | ||
| Line Speed | m/s | 0-25 |
| Ph Value | 2-12 |
Specifications can be specified; please contact our sales staff for specific requirements.
Why choose aramid fiber?
- Exceptional Wear Resistance: Our aramid fiber packing is 5 times stronger than steel by weight, making it ideal for slurry, sand, and granular media.
- High Pressure Stability: Designed to maintain its structure under extreme mechanical loads in pumps and mixers.
- Chemical & Thermal Endurance: Stable across a wide PH range and temperatures up to 280°C.
- Low Shaft Wear: Each strand of our braided aramid fiber is treated with high-grade PTFE dispersion to minimize friction and heat buildup.
Application areas
- Industries: Paper and Pulp mills, Mining, Power Plants, and Wastewater Treatment.
- Equipment: Centrifugal pumps, agitators, mixers, and high-pressure valves handling abrasive fluids.
Aramid Fiber Packing: Technical FAQ
Q1: Why choose Aramid Fiber Packing over standard PTFE packing for slurry pumps?
A: Unlike standard PTFE, aramid fiber packing possesses extremely high tensile strength and superior wear resistance. In slurry pumps or mining applications where sand, grit, and abrasive particles are present, PTFE can be easily "cut" or worn down. Aramid fibers act as a tough barrier that resists abrasion, extending the service life of the seal in harsh environments.
Q2: Does aramid fiber packing cause shaft wear? How does Hebei Xinda minimize this?
A: Because aramid fibers are physically very strong, they can be abrasive to softer shaft materials if not properly lubricated. At Hebei Xinda, our aramid fiber packing is thoroughly impregnated with a high-grade PTFE dispersion and specialized lubricants. This reduces friction at the contact point, ensuring a leak-proof seal while protecting your pump shafts from premature wear.
Q3: What are the temperature and PH limits for Kevlar braided packing?
A: Our aramid fiber packing is designed for versatility. It maintains structural integrity at temperatures ranging from -200°C to +300°C. Regarding chemical compatibility, it covers a wide PH range of 2 to 12, making it resistant to water, oils, mild acids, alkalis, and most industrial solvents.
Q4: Can aramid fiber packing be used in the food or pharmaceutical industry?
A: While aramid fiber itself is chemically stable, its typical lubricants (like PTFE) must meet specific standards for food contact.
Q5: How should I properly install aramid fiber packing to prevent overheating?
A: Proper installation is critical. We recommend cutting the aramid fiber packing into individual rings with a 45-degree miter joint. During startup, allow a higher leakage rate initially to let the packing "run in" and dissipate heat. Gradually tighten the gland nuts until the leakage is reduced to an acceptable level (usually a few drops per minute for cooling).
