蝶式止回閥用于純凈管路及工業、環保、水處理、高層建筑給排水管路，阻止介質逆向流動之用。該止回閥采用對夾式，蝶板為兩個半圓，且采用彈簧強制復位，密封面可為本體堆焊耐磨材料或襯橡膠，使用范圍廣，密封可靠。

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