Chongqing Chuanyi Control Valve Co., Ltd. is a high-tech enterprise in Chongqing, specializing in the production of high-performance CV3000 series control valves and accessories (imported from Yamamoto Corporation of Japan in 1992). Direct regulating valves: single seat regulating valve, cage valve, low-noise valve, high-pressure valve, corrugated pipe regulating valve; Rotating regulating valves: cam deflection valves, butterfly valves, precision small ball valves; Special type regulating valves: black water valve, three-way valve, angle valve, Venturi valve, high-pressure differential valve, low-temperature valve, insulation valve, lined plastic valve, ceramic valve, discharge valve, and self operated valve; Accessories: 55 series of valve positioners, converters, accelerators, holding valves, multifunctional piston actuators, handwheel mechanisms, etc., with 12 types of accessories and over 4000 varieties and specifications of products; The CV3000 localization project was listed as a national torch project in 1996. On the basis of absorbing advanced foreign technologies and continuously innovating, we have independently developed the CV3000 series electric control valve (rated as a national level new product in 1998), HCP cage type single seat control valve, high-performance butterfly valve, high-pressure angle control valve, cage type angle control valve, lined plastic valve, ceramic valve, discharge valve, black water valve, maze valve, and multi-stage pressure reducing control valve; In 1999, we jointly developed the HVP intelligent valve locator with the Silian Technology Center, which has independent intellectual property rights. In 2002, it was put into the market in bulk, and the user response was good.