本蝶閥主要由閥體、轉軸、閥板、閥座及驅動機構（手柄、蝸輪蝸桿、氣動裝置或電動裝置）等組成，靠驅動機構帶動轉軸及閥板旋轉以實現(xiàn)啟閉和控制流量的目的。其特點如下：
      結構簡單、小巧輕便，運輸、安裝、拆卸容易;90°啟閉，開關迅速。操作扭矩小，省力輕巧;密封性能好，使用壽命長，可達到零泄漏;選擇不同的零部件材質，可適用于多種介質;流量特性近似于直線，調節(jié)性能好。        
      A butterfly valve consists of body ,stem ,disc , actuator （manual actuator, worm-gear actuator , aerodynamic actuator or electric actuator） ,it can implement the process for turning on turning offregulating the flow by the circumrotation of stemdisc  that is droved by actuators.
1.Simplecompact construction. Small in sizelight in weight. Easy transportation , installationmaintenance.
2. Quick 90 degrees on-off operation. Minimized operating torque ,energy saving.
3. Excellent sealing performance with no leakage. Long service life.
4. Wide selection of materials ,applicable for various media..
5. Flow curve tending to straight line. Excellent regulation performance.