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碳鋼電動閘閥批發(fā)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(guān)，不適合作調(diào)節(jié)和節(jié)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(shù)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(chǎn)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(chǎn)生的偏差，這種閘板叫做彈性閘板。 閘閥關(guān)閉時，密封面可以只依靠介質(zhì)壓力來密封，即依靠介質(zhì)壓力將閘板的密封面壓向另一側(cè)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(guān)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(fā)銷售具有以下優(yōu)點；

1．流體阻力小，密封面受介質(zhì)的沖刷和侵蝕小。

2．開閉較省力。

3．介質(zhì)流向不受限制，不擾流、不降低壓力。

4．形體簡單，結(jié)構(gòu)長度短，制造工藝性好，適用范圍廣。

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