對焊式電站閘閥簡介：
焊接閘閥的啟閉件是塞形的閥瓣，密封面呈平面或錐面，閥瓣沿流體的中心線作直線運動。閥桿的運動形式，有升降桿式（閥桿升降，手輪不升降），也有升降旋轉桿式（手輪與閥桿一起旋轉升降，螺母設在閥體上）。紋管截止閥只適用于全開和全關，不允許作調節和節流。
對焊式電站閘閥優點：
結構簡單，制造和維修比較方便。
工作行程小，啟閉時間短。
密封性好，密封面間摩擦力小，壽命較長。
結構簡單，制造和維修比較方便。
工作行程小，啟閉時間短。
密封性好，密封面間摩擦力小，壽命較長。
對焊式電站閘閥缺點：
流體阻力大，開啟和關閉時所需力較大。
不適用于帶顆粒、粘度較大、易結焦的介質。
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