PTFE aramid packing and aramid fiber packing for valve
Aramid packing is a high-strength sealing material braided from tough aramid fibers, designed to operate reliably in equipment exposed to heat, abrasion, and demanding process media. With excellent mechanical stability and low wear characteristics, it provides dependable sealing for pumps, valves, mixers, and rotating machinery across a wide range of industries. Its durable structure supports long service life, reduced maintenance, and consistent performance under challenging operating conditions.
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Aramid Packing Data Sheet
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| Test Item | Unit | Target |
| Temperature | ℃ | -200 ~ +300 |
| Pressure | Mpa | 20-30 |
| Loss on Igntion | ||
| Line Speed | m/s | 0-25 |
| Ph Valve | 2-12 |
Aramid packing is widely used for sealing equipment operating under heavy load, strong friction, or chemically challenging conditions. By adjusting the structure and surface treatment of aramid fibers, different packing types offer distinct performance balances—strength, lubricity, chemical resistance, and service life.
Three Main Types & Their Differences
Three Main Types & Their Differences
1. Aramid Fiber Packing
Made from high-tenacity aramid yarns braided into a dense, stable structure.
Strength & Wear Resistance：Highest mechanical strength among the three types; maintains shape under strong shaft pressure.
Temperature Handling：Reliable under continuous high-temperature operations.
Best Use Case：Ideal for slurry pumps, high-speed rotating equipment, and environments with heavy abrasive media.
2. PTFE Aramid Packing
Aramid fibers are uniformly impregnated with PTFE dispersion.
Lower Friction：PTFE surface greatly reduces heat build-up during operation.
Improved Chemical Resistance：More compatible with mild acids, weak alkalis, and corrosive fluids than pure aramid.
Best Use Case：General industrial pumps and valves requiring smooth operation and reduced wear on shafts or sleeves.
3. Black PTFE-Aramid Packing
A hybrid braid combining aramid strands with black PTFE-lubricated yarns.
Balanced Performance：Stronger than PTFE-coated aramid, smoother and more chemically stable than pure aramid.
Enhanced Heat Dissipation：The black PTFE lubricant provides better thermal stability and reduces glazing at high speeds.
Best Use Case：Chemical pumps, mixers, and process lines where both abrasion and corrosion resistance are required.
Industry Applications
Aramid packing—across all three variations—is widely chosen for equipment operating in demanding industrial settings, including：
- 1. Chemical Processing：Acids, solvents, brine, process fluids
- 2. Pulp & Paper Mills：Pumps handling pulp stock, bleaching chemicals
- 3. Power Generation：Boiler feed pumps, cooling systems
- 4. Mining & Slurry Transport：Abrasion-intensive slurry pumps
- 5. Oil & Gas / Petrochemical Plants：Hydrocarbon media, refinery equipment
- 6. Water & Wastewater Treatment：Centrifugal pumps, agitators, clarifiers
- 7. Food & Pharmaceutical Plants（for PTFE-based types）：Low contamination and cleaner sealing performance
