Profile: Qingdao Haiying Valve Co., Ltd. is a manufacturer and supplier of ball valves, butterfly valve, gate valve, check valve, safety valves, and storm valves. Our products are made with cast bronze, cast brass, cast steel, and stainless steel(CF8, CF8M, CF3, CF3M) material. Por products are widely applied in shipbuilding, petroleum Plant, petrochemical Plant, chemical, metallurgy, electric power plant, water conservancy, urban construction, fire fighting, machinery, coal, food and others fields. Our butterfly valve is a double eccentric butterfly valve. For the dual eccentric structure, during the opening process, the disk gradually leaves the seat, and the friction between the sealing surface is reduced, thus extending the service life. The seat is lip type, the material of PTFE, RPTFE and other ultra-high molecular weight polyethylene, no matter how the fluid direction, the seat can always return to the original position after deformation, to ensure the sealing performance.