Profile: Botou Kehua Metal Products Co., LTD specializes in providing casting products. We mainly produce gray iron, ductile iron, cast steel, cast aluminum and other products. Our products include ductile iron valves, cast iron platforms, three-dimensional welding platforms, and manhole covers. Silencing check valve function is to prevent the flow in the opposite direction and only allow the medium to flow in one direction. Usually this kind of valve works automatically. It is not suitable for medium containing solid particles and high viscosity.