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X14W三內(nei)螺紋全銅(tong)旋塞(sai)(sai)(sai)閥(fa)(fa)(fa)是關閉件成柱塞(sai)(sai)(sai)形(xing)(xing)(xing)的旋轉閥(fa)(fa)(fa)，通(tong)(tong)過旋轉90度使閥(fa)(fa)(fa)塞(sai)(sai)(sai)上的通(tong)(tong)道口與閥(fa)(fa)(fa)體上的通(tong)(tong)道口相(xiang)通(tong)(tong)或(huo)分(fen)開，實現開啟或(huo)關閉的一(yi)種(zhong)閥(fa)(fa)(fa)門(men)。閥(fa)(fa)(fa)塞(sai)(sai)(sai)的形(xing)(xing)(xing)狀可(ke)成圓(yuan)柱形(xing)(xing)(xing)或(huo)圓(yuan)錐形(xing)(xing)(xing)。在圓(yuan)柱形(xing)(xing)(xing)閥(fa)(fa)(fa)塞(sai)(sai)(sai)中，通(tong)(tong)道一(yi)般成矩形(xing)(xing)(xing)；而在錐形(xing)(xing)(xing)閥(fa)(fa)(fa)塞(sai)(sai)(sai)中，通(tong)(tong)道成梯形(xing)(xing)(xing)。這些形(xing)(xing)(xing)狀使旋塞(sai)(sai)(sai)閥(fa)(fa)(fa)的結構變得輕巧(qiao)，但(dan)同時(shi)也(ye)產生了一(yi)定(ding)的壓力損失。