密封件可以是高分子材料、石棉或橡胶，密封件材料的选择取决于阀门所输送的介质成分、工作温度、工作压力和流速。
Seals can be polymer materials, asbestos or rubber seal material selection depends on the valve components of the transmission medium, operating temperature, working pressure and flow rate.
在较高的工作压力和较高的工作温度范围内，能实现完全密封。
Work at a higher pressure and higher operating temperature range, can be completely sealed.
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