手动阀门，是通过手柄、手轮操作的阀门，是设备管道上使用普遍的一种阀门。它的手柄、手轮旋转方向顺时针为关闭，逆时针为开启。但也有个别阀门开启与上述开启相反。因此，操作前应注意检查启闭标志后再操作。

Manual valves are valves operated by handles and handwheels, and are commonly used in equipment pipelines. Its handle and handwheel rotate clockwise to close and counterclockwise to open. But there are also a few valves that open in the opposite direction to the above opening. Therefore, attention should be paid to checking the opening and closing signs before operation.

阀门上的手轮、手柄是按正常人力设计的，因此，在阀门使用上规定，不允许操作者借助杠杆和长扳手开启或关闭阀门。手轮、手柄的直径(长度)<320mm的，只允许个人操作，直径>320mm的手轮，允许两人共同操作，或者允许一人借助适当的杠杆(一般不超过0.5m长)操作阀门。但隔膜阀、夹管阀、非金属阀门是严禁使用杠杆或长扳手操作的，也不允许过猛关闭阀门。

The handwheel and handle on the valve are designed for normal manual labor, therefore, it is stipulated that operators are not allowed to use levers and long wrenches to open or close the valve during use. For handwheels and handles with a diameter (length)<320mm, only individual operation is allowed. For handwheels with a diameter>320mm, two people are allowed to operate together, or one person is allowed to operate the valve with an appropriate lever (generally not exceeding 0.5m in length). However, diaphragm valves, pinch valves, and non-metallic valves are strictly prohibited from being operated with levers or long wrenches, and excessive force is not allowed to close the valve.

闸阀和截止阀之类的阀门，关闭或开启到头(即下死点或上死点)要回转1/4～1/2圈，使螺纹更好密合，有利操作，以免?得过紧，损坏阀件。

Valves such as gate valves and globe valves, when closed or opened to the end (i.e. bottom dead center or top dead center), should be rotated 1/4 to 1/2 turn to make the threads better fit and facilitate operation, in order to avoid problems? Too tight, damaging the valve components.

有的操作人员习惯使用杠杆和长扳手操作，认为关闭力越大越好，其实不然。这样会造成阀门过早损坏，甚至酿成事故。除撞击

Some operators are accustomed to using levers and long wrenches to operate, thinking that the greater the closing force, the better. However, this is not the case. This can cause premature damage to the valve and even lead to accidents. Except for impact