ZQO type shut-off ball valve is composed of actuator and ball valve body, O type ball valve has the characteristics of strong function, small size, light and cheap, reliable performance, simple supporting and large circulation capacity. In particular, the ball valve has reliable sealing performance, as the cutting off of the medium in the pipeline, this regulating valve is widely used in petroleum, chemical, electric power, metallurgy, steel, papermaking, medicine, food, textile, light industry and other industries.