Hongwo Braided Packing
High Temperature PTFE graphite gland packing
Engineered for the Furnace of Industry
Hongwo’s High Temperature PTFE Graphite Gland Packing redefines thermal sealing performance through its proprietary layered construction. Combining expanded PTFE’s flexibility with high-purity graphite’s thermal conductivity, this advanced packing maintains seal integrity where conventional materials carbonize and fail – delivering reliable performance from cryogenic temperatures up to 600°C (1112°F).
Where Infernos Meet Industry
⚡ Power Plant Steam Valves – Withstands 540°C superheated steam (100+ bar)
⚡ Glass Furnace Equipment – Resists molten glass splashes and thermal cycling
⚡ Petrochemical Crackers – Seals pyrolysis gas at 550°C with zero hardening
⚡ Cement Kiln Systems – Endures abrasive dust at 600°C continuous service
⚡ Aerospace Test Rigs – NASA-verified for rocket engine component testing
Thermodynamic Performance Matrix
| Critical Parameter | Test Standard | HT-X500 Grade | Standard Graphite Packing |
|---|---|---|---|
| Maximum Continuous Temp | ASTM D7216 | 600°C | 450°C |
| Thermal Conductivity | ASTM E1461 | 35 W/m·K | 18 W/m·K |
| Compression Set @ 500°C | ISO 1856 | 12% | 38% |
| Oxidation Resistance | ASTM D7542 | <0.5% wt loss | 3.2% wt loss |
| Coefficient of Friction | ASTM D1894 | 0.08 | 0.14 |
Breakthrough Thermal Management Architecture
✧ Triple-Layer Construction
- Outer PTFE Armor – 0.5mm thick expanded PTFE skin resists particle embedment
- Graphite Matrix Core – 98% pure flake graphite aligned for radial heat transfer
- Inner Hybrid Liner – PTFE/graphite composite prevents shaft fretting
✧ Patented Thermal Bridge Technology – Channels heat away from shaft interface
Operational Advantages
✓ Thermal Shock Resistance – Withstands 500°C→25°C quenches without cracking
✓ Self-Adjusting Density – Graphite expansion compensates for gland relaxation
✓ Corrosion Immunity – Passes NACE TM0177 sour service testing
✓ Non-Contaminating – USP Class VI compliant for food/pharma applications
Available in Specialized Formulations:
- HT-X500 Standard – General high temp service
- HT-X600 Nuclear Grade – Boron-doped for neutron absorption
- HT-X550 Abrasion-Resistant – Carbon fiber reinforced for dusty environments
Field Proven Performance:
▶ 18-month continuous service in refinery delayed coker (538°C)
▶ Zero maintenance required on glass furnace stirrers (2,200+ thermal cycles)
▶ 83% reduction in steam valve repacking vs. conventional graphite
(Ask about our Thermal Imaging Inspection Service – we’ll analyze your gland temps remotely!)
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