1. A mechanical seal is a critical component used to prevent fluid leakage in rotating equipment like pumps, mixers and compressors.
2. It mainly consists of stationary ring, rotating ring, spring, auxiliary seal and gland, forming a sealed face via precise fitting.
3. The sealed faces (rotating & stationary) are the core part, requiring high flatness to ensure tight sealing under pressure.
4. Mechanical seals are divided into single-end, double-end, balanced and unbalanced types based on structure and working principle.
5. Temperature, pressure, medium corrosiveness and rotational speed are key factors affecting mechanical seal service life.
6. Common materials for seal faces include silicon carbide, tungsten carbide, alumina ceramic and carbon graphite for good wear resistance.
7. Auxiliary seals are usually made of fluororubber, nitrile rubber or PTFE to adapt to different media and temperatures.
8. Proper installation with accurate alignment can avoid premature wear and leakage of mechanical seals.
9. Regular cleaning and lubrication of the seal area help maintain its sealing performance and extend service life.
10. Mechanical seals have better sealing effect and longer service life than traditional packing seals in industrial applications.
