Manufactured from natural graphite flakes via a dual - stage process of chemical intercalation and thermal exfoliation, flexible graphite materials—including expanded graphite sheets, foil, tape, and strips—are engineered to meet the stringent demands of industrial valve sealing. The exfoliation process produces worm - like graphite structures with an ultralow bulk density of approximately 3 kg/m³. These structures are then compressed into rolls or sheets without binders, ensuring a purity exceeding 99.8% and optimal sealing performance.
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Chemical Resistance
- Resists aggressive media such as acids, alkalis, and hydrocarbons in valve bodies and pipelines.
- Non - reactive nature prevents contamination in pharmaceutical and food processing valves.
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Thermal Stability
- Maintains structural integrity from cryogenic temperatures (-200°C) up to 3000°C in high - temperature steam valves.
- Low thermal expansion coefficient minimizes dimensional changes under rapid temperature fluctuations.
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Dynamic Sealing Efficiency
- Self - lubricating properties reduce friction in moving valve components like stems and ball seats.
- Impermeable structure prevents leaks in gas, liquid, and slurry handling valves.
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Valve Stem Sealing
- Forms reliable seals in gate, globe, and butterfly valves, compensating for stem wear and pressure variations.
- Composite versions with metal reinforcement enhance durability in high - pressure valves (API 6D compliance).
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Flange Gaskets
- Custom - cut to fit ASME B16.5 flange dimensions, ensuring leak - free connections in pipeline systems.
- Corrugated designs improve sealing contact in irregular mating surfaces.
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Valve Body Seals
- Directly integrated into valve housings to prevent external leakage in critical applications like oil refining and chemical processing.
- Sizes:
- Rolls: 1000mm/1500mm width, 30m/50m/80m length.
- Sheets: 1000mm x 1500mm, thicknesses from 0.15mm (precision seals) to 5mm (heavy - duty valves).
- Density: 0.8–1.25 g/cm³ (adjustable to balance compressibility and pressure resistance).
- Special Features:
- Laser - cut profiles for complex valve geometries (e.g., eccentric butterfly valves).
- Surface treatments like PTFE coating for enhanced chemical resistance.
- Meets API 607 fire test requirements for hydrocarbon - handling valves.
- Compliant with ASME BPVC Section VIII for pressure vessel applications.
- Tested for gas leakage (ASTM F137), compression stress relaxation (ASTM F38), and chemical compatibility (NACE TM0177).
- Longevity: Reduces maintenance intervals with a service life of over 15 years in continuous operation.
- Cost - Savings: Minimizes downtime and replacement costs through resistance to erosion and cavitation.
- Technical Support: Provides finite element analysis (FEA) for optimizing gasket performance in critical valves.
Engineered to deliver leak - tight performance in the most challenging valve environments.