球阀的工作原理是靠旋转阀杆来使阀门畅通或闭塞。可以全通径球阀、90℃角、球阀开关轻便，体积小，可以做成大口径，密封可靠，结构简单，维修方便，密封面与球面常在闭合状态，不易被介质冲蚀，在各行业得到广泛的应用。球阀在管路中主要用来做切断、分配和改变介质的流动方向。

Application
The operating principle of ball valve is to rely on rotating stem for opening or closing it. It can be full-size or half-size. Its switch is light and it’s small volume and at the same time, it can be made into big caliber and reliable sealing, simple structure and convenient maintenance. Sealing face and sphere is often in the closed state and not simply eroded away by medium. Ball valves are widely used in various industries. They are mainly used to cut off, distribute and change flow direction of medium on lines.