是一种高效、可靠、结构简单的控制阀门，通过旋转球体角度控制阀门启闭，其密封材料通常为氟塑料，根据工况、温度、压力的不同选用合适的阀座，密封为零泄漏。

It is an efficient, reliable, and structurally simple control valve that controls the opening and closing of the valve by rotating the ball angle. Its sealing material is usually fluoroplastic, and suitable valve seats are selected according to different working conditions, temperatures, and pressures to achieve zero leakage.