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Negli ultimi anni, con il rapido sviluppo dell'ingegneria moderna, sigilli meccanici per vari scopi, come sigilli ad alta temperatura, sigilli a bassa temperatura, sigilli a bassa temperatura, sigilli ad alta pressione, sigilli ad alta depressione, sigilli ad alta velocità, nonché vari supporti infiammabili, esplosivi, tossici, fortemente corrosivi,contenenti particelle sospese come il fango e la sabbia, sono emersi uno dopo l'altro, presenta requisiti più elevati per la chiusura meccanica.

    In order to ensure the mechanical seal has good sealing performance and long service life, besides reasonable sealing structure and manufacturing technology, the main material with good sealing performance should be more important. Therefore, for mechanical sealing device, if the structure is the leader and the process is guaranteed, the material is the foundation, that is, the sealing material is the key to ensure the sealing performance and service life.The progress of mechanical seal level is closely related to the development of sealing materials. The requirement of modern engineering for sealing is, to a large extent, the requirement for sealing materials.