O type electric cutting-off ball valve serves as an on-off ball valve,  having 90℃ rotating angle. A same-sized passage is formed when turn on the valve. The passage functions as smooth flow, little resistance and the strong flow capacity. The valve functions as strong sealing capacity and little leakage as you close it. It applied to the mediums like gas, liquid and steam as well as sewage, fiber and widely applied to the fields of electric power plant, petroleum, chemical industry and paper making industry.