本装置由人力操作手轮，通过锥形齿轮等减速传动，直接驱动阀门阀杆上下移动，启闭阀门。
The device by the human operator launches, such as through the cone-shaped gear reducer drive, direct drive valve stem up and down movement of the valve gate.
残油的排放可由减速机尾部的阀门和推力轴承油池的放油阀门来进行。
Residual oil can be drained via valve at the rear of gear reducer and oil drain valve in thrust bearing oil sump.
采用蜗轮减速器，不仅可以使蝶板具有自锁能力，使蝶板停止在任意位置上，还能改善阀门的操作性能。
The use of worm gear reducer, not only with self-locking butterfly board so that board butterflies stop at any position on, but also to improve the valve performance.
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