网上赌哪个网站靠谱

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                首頁 > 產品中心 > 截止閥 > J41H鑄鋼法蘭高壓截止閥
                • J41H鑄鋼法蘭高壓截止閥的啟閉件是塞形的閥瓣,密封面呈平面或錐面,閥瓣沿流體的中心線作直線運動。閥桿的運動形★式,有升降桿式(閥桿升降,手輪不升降『),也有升降旋轉桿式(手輪與閥桿一起旋轉升降,螺母設在閥死去體上)。截止閥只適用於〓全開和全關,不允許作調節和節流。
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