The sealed ring of the disc uses composite materials adhered by multilayer-metal and Graphite, which has excellent sealability no matter at a high temperature or a low one.

• 蝶板密封面采用多层次金属与石墨粘合而成的复合草料， 刚柔并济，无论在高温或低温工况下， 均具有良好的密封性能；