碳鋼電動閘閥批發銷售的啟閉件是閘板，閘板的運動方向與流體方向相垂直，閘閥只能作全開和全關，不適合作調節和節流。閘板有兩個密封面，zui常用的楔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5o。楔式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，以改善其工藝性，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。 閘閥關閉時，密封面可以只依靠介質壓力來密封，即依靠介質壓力將閘板的密封面壓向另一側的閥座來保證密封面的密封，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，以保證密封面的密封性。

碳鋼電動閘閥批發銷售具有以下優點；

1．流體阻力小，密封面受介質的沖刷和侵蝕小。

2．開閉較省力。

3．介質流向不受限制，不擾流、不降低壓力。

4．形體簡單，結構長度短，制造工藝性好，適用范圍廣。

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