The valves manufactured and sold by Shuangheng Valve Co., Ltd including self-control valve, manual valve, automatic valve, lining valve and fittings. Self-control valve are regulating valve, electric regulating valve, pneumatic valve, vertical pressure regulating valve, vertical temperature regulating valve, magnetic valve. The manual valves are gate valve, globe valve, ball valve,Butterfly valve, piston valve, plug valve, diaphragm valve and middle valve. Automatic valves are check valve, safety valve, pressure-reducing valve, water isolate valve, air vent valve, balance valve, breather valve, strainer and hydraulic valve. Lining valve are gate valve globe valve, ball valve, butterfly valve, diaphragm valve and lining pipe, elbow, template pipe and flange of all kinds of specification. Furthermore we can manufacture and process the specificial valve upon customer's request. Our company located in jinshan district , shanghai city,which covers an area of 60,000 square meters. Wi