Chongqing Chuanyi Regulating Valve Co., Ltd. is a high-tech enterprise in Chongqing. It specializes in the production of high-performance CV3000 series regulating valves and accessories (introduced from Japan Yamamoto Corporation in 1992). Straight-through regulating valves: single-seat regulating valve, cage valve, low-noise valve, high-pressure valve, bellows regulating valve; rotary regulating valve: cam flexure valve, butterfly valve, fine small ball valve; special regulating valve: black water valve, three-way valve, angle valve, venturi valve, high-pressure differential valve, low-temperature valve, insulation valve, liner valve, ceramic valve Accessories: 55 series of valve positioners, converters, accelerators, retaining valves, multi-functional piston actuators, handwheel mechanisms, 12 kinds of accessories, more than 4000 kinds of products; CV3000 domestic projects, listed as the national torch project in 1996. On the basis of absorbing foreign advanced technology and innovating continuously, CV3000 series electric regulating valves (which were awarded as national new products in 1998), HCP cage type single seat regulating valves, high performance butterfly valves, high pressure angle regulating valves, cage type angle regulating valves, plastic lining valves, ceramic valves, discharging valves, black water valves, labyrinth valves and multi-stage valves were developed by ourselves. Hypotension regulator valve; In 1999, HVP intelligent valve positioner was developed jointly with Quadruple Technology Center. It has independent intellectual property rights. In 2002, it was put into the market in batches, and the response of users was good.