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明桿防護閘閥
明桿防護閘閥

明桿防護閘閥

明桿防護閘閥的啟閉件是閘板,閘板的運動方向與流體方向相垂直,明桿防護閘閥只能...
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明桿防護閘閥的啟閉件是閘板,閘板的運動方向與流體方向相垂直,明桿防護閘閥只能作全開和全關,不能作調節和節流。

閘板有兩個密封面,模式閘板閥的兩個密封面形成楔形、楔形角隨閥門參數而異,通常為50,介質溫度不高時為2°52'。明桿防護閘閥的閘板可以做成一個整體,叫做剛性閘板;也可以做成能產生微量變形的閘板,以其工藝性,彌補密封面角度在加工過程中產生的偏差,這種閘板叫做彈性閘板。

明桿防護閘閥的種類,按密封面配置可分為楔式閘板式閘閥和平行閘板式閘閥,楔式閘板式閘閥又可分為:單閘板式、雙閘板式和彈性閘板式;平行閘板式閘閥可分為單閘板式和雙閘板式。按閥桿的螺紋位置劃分,可分為明桿防護閘閥和暗桿閘閥兩種。

明桿防護閘閥關閉時,密封面可以只依靠介質壓力來密封,即只依靠介質壓力將閘板的密封面壓向另一側的閥座來密封面的密封,這就是自密封。大部分閘閥是采用強制密封的,即閥門關閉時,要依靠外力強行將閘板壓向閥座,以密封面的密封性。


吉林明桿防護閘閥 遼寧明桿防護閘閥 
老司机午夜视频
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