Dayang Valve Co. , Ltd. is a set design, manufacturing, sales and service in one of the professional valve manufacturers, we have nearly 20 years of design and development experience. The company has CNC machining center, and has casting, machining, welding heat treatment, assembly pressure test, and other production, inspection center. Complete processing equipment, advanced testing equipment. Has passed the ISO9001-2008 quality system certification, TS certification, ISO14001 Environmental Management System certification and OHSAS18001 Occupational Health and Safety Management System certification. The main products are gate valves, globe valves, ball valves, check valves, butterfly valves, plug valves, metallurgical valves, oxygen valves, power station valves and all kinds of non-standard special valves. The main materials are carbon steel, stainless steel, alloy steel, Monel, No. 20 alloy and special steel, etc. . The production diameter is 1/2"~ 140"(DN15 ~ 3500mm) , the pressure is 150Lb ~ 4500Lb, products are widely used in petrochemical, natural gas, petroleum, metallurgy, construction, hydropower, pharmaceutical and other industries.