传感器、电缆组件、测控设备技术与产品、发动机控制系统及动力推进系统、流体控制系统产品、特种泵阀、汽车零部件、热能燃烧工程产品、非标设备、成套设备、模拟设备、无人飞行器、橡塑密封件、环保节能技术产品及节水技术产品的研发，生产，销售、安装调试和售后服务；大气污染防治工程施工；自产产品及技术的出口业务；生产所需的原辅材料、仪器仪表、机械设备、零配件及技术的进出口业务；普通货物运输。(依法须经批准的项目，经相关部门批准后方可开展经营活动)
In order to solve the problems of large operating torque, easy internal leakage and poor anti-fouling capability of the general ball valves in the oil and gas pipelines, a new type of four-disc friction-free ball valve was designed based on the existing valve structures such as the double block and bleed valve and the orbit valve. Herein, the overall structure and operating principle of the four-disc friction-free ball valve, as well as the design scheme and the key technology of the transmission mechanism of the main valve and the operator, were introduced. Through the development performance test and the industrial application of oil pipelines, the new four-disc friction-free ball valve was verified to be of stable and reliable performance. The new ball valve, with the design idea expanded and the performance and service life improved greatly, can be promoted and applied in the oil pipeline engineering and petrochemical pipeline to improve the technical level and performance reliability of valves used in the national oil and gas pipelines, further to ensure the independence and safety control of the national energy transmission project.
