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.
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.
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。
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