Valve We provide industrial steel valva according to API, ASME ... globe, plug, butterfly, safety, oil field and other special valves that are applied broadly in petroleum,chemical,metallurgical and power ... valves. Among 35% and 30% in total output by ball valve and gate valve respectively.Metal seated ball valve, below sealed valve and water check valve ... , F11, F22, F6, F51, F316H, F321, F347, etc Valve