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

1. ‌Outer PTFE Armor‌ – 0.5mm thick expanded PTFE skin resists particle embedment
2. ‌Graphite Matrix Core‌ – 98% pure flake graphite aligned for radial heat transfer
3. ‌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

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‌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!)