Hongwo Braided Packing
Engineered for Extreme Conditions
Hongwo’s Black Graphite PTFE Gland Packing with Aramid Corners combines the best of three worlds: the chemical resistance of PTFE, the thermal conductivity of graphite, and the mechanical strength of aramid fibers. Designed for demanding industrial applications, this hybrid packing delivers superior sealing performance under high pressure, extreme temperatures, and aggressive chemical environments.
Key Applications Where Performance Matters
⚙ High-Pressure Steam Valves – Seals reliably at 400°C (750°F) and 100+ bar
⚙ Chemical Processing Pumps – Resists acids, alkalis, and solvents
⚙ Oil & Gas Wellheads – API 6A compliant for sour service (H₂S environments)
⚙ Power Plant Turbines – Handles thermal cycling and vibration
⚙ Marine Propeller Shafts – Saltwater-resistant with long-term durability
Technical Specifications That Set the Standard
| Parameter | Test Method | BlackGraph™ Series | Standard PTFE Packing |
|---|---|---|---|
| Temperature Range | ASTM D7216 | -50°C to +400°C | -30°C to +260°C |
| Thermal Conductivity | ASTM E1461 | 25 W/m·K | 0.25 W/m·K |
| Tensile Strength | ASTM D5035 | 220 MPa | 80 MPa |
| Chemical Resistance | ASTM D543 | 95% H₂SO₄, 50% NaOH | Limited to mild acids |
| Pressure Rating | ISO 15848 | 350 bar (5,000 psi) | 150 bar (2,200 psi) |
Patented Hybrid Construction
✧ Three-Layer Defense System
- Outer PTFE-Graphite Matrix – Provides chemical and thermal protection
- Aramid Corner Reinforcement – Prevents extrusion in high-pressure zones
- Inner Lubricating Core – Graphite-impregnated for smooth running
✧ Smart Pressure Response
• Self-Tightening Under Load – Aramid fibers expand to fill gland clearance
• Thermal Recovery – Maintains seal integrity during temperature fluctuations
Why Choose This Advanced Packing?
✓ Extended Service Life – 3X longer than conventional PTFE packing
✓ Lower Maintenance Costs – Reduces downtime and repacking frequency
✓ Versatile Performance – Works in both rotary and reciprocating motion
✓ Environmentally Safe – Contains no asbestos or hazardous materials
Specialized Grades Available:
- BlackGraph™ HP – For ultra-high pressure (up to 700 bar)
- BlackGraph™ CR – Chlorine-resistant for pulp & paper industry
- BlackGraph™ FM – Food-grade compliant for processing equipment
Proven Field Performance:
▶ 24-month continuous service in refinery crude oil pumps
▶ 85% reduction in leakage compared to traditional graphite packing
▶ Zero failures in API 6A qualification testing
(Ask about our Custom Sizing Service – we manufacture to your exact specifications!)
Unique Value Proposition:
- Hybrid Material Science – Showcases advanced composite technology
- Extreme Condition Ratings – Validates performance in toughest environments
- Comparative Data Table – Clearly demonstrates superiority
- Specialized Grade Options – Caters to specific industry needs
- Field Testimonials – Provides real-world performance evidence
Hengshui Hongwo – Where Innovation Seals the Future!
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