Tianjin Tanggu Huayang Valve Co., Ltd is a share-holding company that originated from the system reforming of Tianjin Tanggu Valve Plant which is established in 1956, specialized in producing medium and low pressure valves. It is the first domestic valve manufacture that passed ISO9001 certificate by DNV international certification organization in 1993. As the first valve manufacture imported the technology of Center Line butterfly valve from Mark Controls in 1980, it was regarded as the pioneer of the butterfly valves manufacture in China. The product center line butterfly valves were awarded the silver Medal of National Products in 1988. It established a joint venture with American Watts Industries Company in 1994. The main products are butterfly valves, gate valves, check valves, ball valves Y-strainers which are widely used in water draining, power generation, petroleum, chemical industry, heat supply, metallurgy, medicine etc. The products have been sold in international market such as Europe, American, Africa and Asia.