Hongwo Braided Packing
Pure Carbon Performance Redefined
Engineered for modern industrial challenges, Expanded Graphite Gland Packing represents the pinnacle of thermal sealing technology. Unlike conventional braided packings, our 100% pure expanded graphite structure delivers unmatched heat dissipation while maintaining exceptional chemical inertness – making it the ideal choice for extreme-temperature applications where traditional materials fail.
Where Conventional Packings Fall Short
🔥 High-Temperature Process Valves (up to 650°C continuous)
⚡ Power Plant Superheated Steam Systems
🧪 Corrosive Chemical Reactors (resists 98% H₂SO₄ & 50% NaOH)
🛢 Refinery Flare Stack Seals (API 622 compliant)
🧊 Cryogenic LNG Pumps (-200°C cold box applications)
Material Science Breakthrough
| Property | Test Method | XG-9000 Series | Traditional Graphite |
|---|---|---|---|
| Thermal Conductivity | ASTM E1461 | 120 W/m·K | 25-35 W/m·K |
| Compression Recovery | API 622 | 98% | 85-90% |
| Oxidation Threshold | TGA Analysis | 550°C (in air) | 450°C |
| Particle Shedding | ISO 8573-1 | Class 1 | Class 3 |
| Sealability Index | ISO 15848 | AH Class | BH Class |
Engineered for Critical Service
Multi-Directional Flexibility
• Isotropic Structure – Equal performance in radial/axial directions
• Memory Retention – Returns to original thickness after decompression
• Layered Design – Customizable density (0.8-1.3 g/cm³)
Advanced Manufacturing Process
✓ Electrostatic Expansion – Creates uniform pore structure
✓ Rolling Calendaring – Achieves precise thickness tolerance (±0.05mm)
✓ Laser Quality Control – 100% surface defect detection
Unmatched Technical Advantages
1. Thermal Superconductor
• 4X faster heat transfer than braided graphite
• Prevents gland overheating in steam applications
2. Chemical Immunity
• pH stable from 0-14
• Zero chemical degradation in sour gas (NACE MR0175 certified)
3. Maintenance Optimization
• 50% longer service intervals vs. conventional packing
• No break-in period required
4. Emission Control
• TA-Luft compliant (leakage <50 ppmv)
• EPA Method 21 verified
Specialized Configurations
- XG-9100HT – With Inconel foil reinforcement (800°C intermittent)
- XG-9200FM – FDA-compliant for food processing
- XG-9300AT – Anti-static version for explosive atmospheres
Industry Validation
▶ 12,000+ hours continuous operation in geothermal wellheads
▶ Zero unplanned downtime in FCCU reactor valves
▶ 100% success rate in ISO 15848 Type Testing
(Technical datasheets and material samples available upon request)
Expanded Graphite Gland Packing
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