Tianjin Baili Ertong Machinery Co., Ltd.( primary Tianjin No.2 General Machinery Factory), it was established in 1955. The company began to develop and produce valve electric actuators in 1964. The first valve electric actuator was made by Tianjin Baili Ertong Machinery Co.,Ltd in China.The company has been researching, designing, manufacturing and testing electric valve actuators for half a Century as well as has made glorious achievements all over the world. Tianjin Baili Ertong Machinery Co., Ltd, the only valve drive enterprise imported U.S. Limitorque technology. The third generation intelligent valve electric actuators： IMC 、IQT 、XZA、QT、QBR series and SMC series technology imported have been widely used to petrol-chemical, metallurgy, electric power (thermal power,nuclear power, hydropower ), military, municipal (water, sewage treatment, nature gas), light industry, food and other fields. This series plays a significant role in country development.