Jiujiang Zhongchuan Instrument Co., Ltd.(441 Factory) is founded in Year 1959, restructured and reorganized from Jiujiang Instrument Factory with approval from original Commission of Science, Technology and Industry for National Defense. We are large comprehensive steering devices manufacturing enterprise. Our representative gyro compass and auto steering device for navigation equipments and system, precise hydraulic control system with Jet-pipe electrohydraulic servo valve as core component and representative environment protection system including oil-water automatic monitoring. Jiujiang Zhongchuan has a very important position among domestic marine automatic navigation, precision hydraulic control, petrochemical industry and environment protection industries. We have R & D team to continuously improve relevant technique which keeps our core technique in a leading position. With more than 50 years development, we have perfect manufactory equipments and process capacity, modern precise processing, testing and simulation equipments. We also have capabilities of producing, configuration and testing for casting, forging, soldering, welding, pressing, die processing, heat treatment, electroplating, painting, machining, installation and configuration, inspection and testing, and stronger machining capacity for machine, electric and hydraulic products which can meet the requirements of trail producing of new products and batch process. We received GB/T19001 quality system certificate in Year 2000, GJB9001A quality system certificate and the manufacturing license& measurement certificate from State Bureau of Quality and Technical Supervision in Year 2001 and National Level 2 Confidential Qualification Certificate in Year 2005. We receive high reputation among customers via steady quality products and perfect after-sale service.