NKJ61H真空截止閥閥蓋填料室設(shè)有真空密封結(jié)構(gòu)，具有自脹壓緊作用，閥瓣密封面與閥座密封面采用STL堆焊,保證了耐磨/零泄漏。密封面運動磨擦力小、啟閉輕便，而且密封面磨損有自動補償功能。

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http://www.2tkw.com/list/?100_1.html 對夾止回閥
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