H11W不銹鋼內螺紋止回閥工作原理：
內螺紋升降式止回閥的結構一般與截止閥相似，其閥瓣沿著通道中以線作升降運動，動作可靠，但流體阻力較大，適用于輕小口徑的場合。內螺紋升降式止回閥一般只能安裝在水平管路。
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