閘閥 閘閥是一種常見的截斷閥,主要用來接通或截斷管路中的介質。閘閥的閘板具有兩面密封,運動方向與介質流向垂直,閘閥大多是通過外力強制壓向閥座,以達到密封要求。按內部結構可分為:楔式單閘板式、彈性閘板式、雙閘板式、平行閘板式。氣動閥也可分為:…
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