During the actual model selection and installation process, any type of gasket must have the following eight important characteristics to ensure long-term sealing performance in extreme use environments.
1. Gasket sealing
For materials that seal the system, the gasket will not leak within a certain period of time at the recommended temperature and pressure.
2. Fluid density of gasket
The surfaces of the gasket and flange should be in good contact after the connecting bolts are tightened to ensure sealing.
3. Gasket resistance to stress relaxation
The gasket should have good stress relaxation resistance under the influence of pressure load and operating temperature, otherwise it will cause damage to the anchor bolt pitch, causing the surface stress of the gasket to decrease, thereby causing the gas system to leak.
4. Gasket resistance to chemical corrosion
The gaskets used should not be corroded by organic chemicals and should not be contaminated by environmental pollutants.
5. Gasket resilience
Even when the system is stable, the two flexible graphite packing flanges connected by the graphite spiral gasket will undoubtedly deflect due to the effects of temperature and pressure, and the elasticity of the gasket should be able to fill this
Offset to ensure a tight seal.
6. Gasket resistance to adhesion
The gasket should be easily removable from the flange after use without adhesion.
7. No corrosion of gaskets
The gasket prevents corrosion on the flange surface of the connection.
8.Temperature resistance of gasket
The gasket used should ensure normal operation at the minimum temperature of the system and the temperature of the metal cladding pad. Flexible high-purity graphite sealing material has been proven to be a very effective material by relevant companies. The flexible high-purity graphite produced by Qingdao Huatai High Purity Graphite is especially suitable for sealing under ultra-high pressure conditions, and is also used for sealing harmful and corrosive chemical pipes. It not only has technical advantages, but also has significant economic effects.
