Flexible Graphite Sheet for Valve Sealing

Product Overview

Critical Performance Features for Valve Applications

1. 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.
2. 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.
3. 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.

Valve - Specific Applications

1. 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).
2. 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.
3. Valve Body Seals
   • Directly integrated into valve housings to prevent external leakage in critical applications like oil refining and chemical processing.

Customizable Specifications for Valve Systems

• 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.

Compliance & Testing

• 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).

Why Choose Our Valve Sealing Solutions?

• 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.