Definition Of Graphite Sealing Rings

The graphite self-sealing ring is a ring-shaped sealing component produced by molding low-sulfur expanded graphite. It is typically manufactured by shearing, spiral-winding, and compressing pure flexible graphite paper; while its cross-section is predominantly square, it can also be processed into wedge or V-shapes for use in high-pressure applications, or fabricated with a 45-degree miter cut. Reinforced versions feature internal liners-such as stainless steel-to enhance their compressive strength.

This product possesses inherent self-lubricity, high resilience, and impermeability, enabling it to withstand operating conditions characterized by severe fluctuations in temperature and pressure. Its operational temperature range extends from -200°C to 800°C (in non-oxidizing environments), with a pressure rating of up to 35 MPa; it is suitable for use with a wide variety of media, including hot water, high-temperature and high-pressure steam, and organic solvents. It is commonly employed for both dynamic and static sealing applications in equipment such as valves, pumps, and compressors.