提出了一种双向压金属硬密封蝶阀蝶板可逆回转机构，讨论了可逆回转机构的工作原理、受力分析及特点。
A new returnable actuator disk of metal seal structure butterfly valve was presented, and its principle, force analysis, characteristic of the actuator were discussed as well.
提出了一种双向压金属硬密封蝶阀，讨论了这种蝶阀的结构、工作原理、密封的可靠性及特点。
It also provides a bilateral metal hardware sealed butterfly valve, and the structure of butterfly valve, working principle, reliability and features of seal are discussed.
在一些特殊场合对金属硬密封蝶阀的密封提出了更高的要求，必须双向承压。
In some special occasions for metal hard seal butterfly valve seal put forward higher request, must be two-way under pressure.
在一些特殊场合对金属硬密封蝶阀的密封提出了更高的要求，必须双向承压。
In some special occasions for metal hard seal butterfly valve seal put forward higher request, must be two-way under pressure.
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