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X43W-10T二通(tong)(tong)(tong)全(quan)銅法蘭旋(xuan)塞(sai)閥(fa)是(shi)通(tong)(tong)(tong)過旋(xuan)轉90°使閥(fa)塞(sai)上(shang)的(de)(de)通(tong)(tong)(tong)道(dao)口(kou)與閥(fa)體上(shang)的(de)(de)通(tong)(tong)(tong)道(dao)口(kou)相同或(huo)分開，實現開啟或(huo)關閉的(de)(de)一種閥(fa)門。 旋(xuan)塞(sai)閥(fa)的(de)(de)閥(fa)塞(sai)的(de)(de)形狀(zhuang)可成(cheng)(cheng)圓(yuan)柱形或(huo)圓(yuan)錐形。在圓(yuan)柱形閥(fa)塞(sai)中(zhong)，通(tong)(tong)(tong)道(dao)一般成(cheng)(cheng)矩(ju)形；而在錐形閥(fa)塞(sai)中(zhong)，通(tong)(tong)(tong)道(dao)成(cheng)(cheng)梯形。這些形狀(zhuang)使旋(xuan)塞(sai)閥(fa)的(de)(de)結構變(bian)得(de)輕(qing)巧，但同時(shi)也(ye)產生了(le) 一定的(de)(de)損失(shi)。旋(xuan)塞(sai)閥(fa)適于作為切(qie)斷和接通(tong)(tong)(tong)介質以及(ji)分流適用，但是(shi)依據適用的(de)(de)性質和密封面的(de)(de)耐沖蝕性，有(you)時(shi)也(ye)可用于節流。