在半球体阀芯一侧开有V型口，通过调节阀芯开度，改变介质流通的截面积，实现流量调节，也可以用于开关控制，实现管道的开启或关闭。V型口具有自清洗作用，在小开度范围内可实现微小流量的调节，可调比大，适用于含纤维、细小颗粒、料浆类介质。

There is a V-shaped opening on one side of the hemispherical valve core. By adjusting the opening of the valve core, the cross-sectional area of the medium flow can be changed to achieve flow regulation. It can also be used for switch control to achieve the opening or closing of pipelines. The V-shaped mouth has a self-cleaning function and can achieve small flow adjustment within a small opening range. It has a large adjustable ratio and is suitable for media containing fibers, small particles, and slurries.