Graphite Sealing Ring: Technical Parameters and Performance
Apr 19, 2026| The fundamental physical parameters of graphite sealing rings include a density of 1.4–1.8 g/cm³ and a chemical resistance range applicable to pH values from 0 to 14. Their maximum operating temperature ranges from -200°C to 800°C in non-oxidizing environments, and from -200°C to 580°C in steam or oxidizing environments.
The maximum operating pressure for graphite self-sealing rings can reach 35 MPa (approximately 250 kgf/cm²), while for certain high-pressure applications-such as in valves-it can extend up to 800 bar. Their permissible linear velocity can reach 12 m/s.
Graphite self-sealing rings possess a range of key performance characteristics, including excellent self-lubricity, a high coefficient of resilience, superior compressibility and elasticity, impermeability, corrosion resistance, resistance to aging, a long service life, wear resistance, and the ability to automatically compensate for wear.