A double flexible metallic O-Ring seat provides a (1) static and (2) dynamic seal and assures compliance to fire-safe specifications.

双重柔性金属O形环阀座具有静止和动态密封性能，确保符合防火规则要求。

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The seal ring uses the floating seat ring structure with o-sear ring sealed and pre-tightening force applied to have inlet and outlet dual-way sealed;

阀座采用O形密封圈密封和施加预紧力的浮动阀座结构，使阀门进出口双向密封；

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