Shanghai Chengxin Self Control Valve Co., LtdWe are a valve enterprise specializing in industrial process control valves and related fluid control equipment. The company is located in Shanghai, one of the four municipalities directly under the central government in China. The company is committed to selling electric control valves, pneumatic control valves, self operated control valves, temperature control valves, high temperature and high pressure control valves, nitrogen supply valves, nitrogen relief valves, pneumatic ball valves, pneumatic butterfly valves, and process valves in multiple fields