Established in 1992, Shanghai Petro Valves Factory (TOPVAL) is leading manufacturer and Designer. Topval manufactures industrial valves, electric actuators, and hydraulic actuators. The company has a registered capital of 60 millions, a total investment of 80 million RMB, owns a land area of 61000 square meters, one in Shanghai City, http://www.topval.cn/Product-Plug-in-Valve-SCZ.htm