Wenzhou HongWang Valve & Fitting Co., Ltd is a design, development, casting, production and sales of high-tech enterprises valve, main products are high platform series ball, piece ball valve, flanged ball valve, ball valve, gate valve, globe valves, filters, check valves, pneumatic electric valves, pneumatic angle seat valve, precision castings, and other products. Products can be used separately GB, API, ANSI, BS standards for the design, production and acceptance according to different ...