Ductile iron square manhole cover

Our factory substantial covers production of ductile iron is used in various types of well-head of domestic large-scale projects, and a large number of exports to foreign markets. Main products include ductile manhole covers, composite resin covers, drill rod cement covers, galvanized steel grating, polymer alloy covers, cast iron manhole covers, flower bar, cast iron pipe . The new ductile iron Manhole Cover is arranged on a support seat on the embedded strip, so when the vehicle passes in the top cover, reduce the overall vibration, effectively prevent noise. In theory, ductile iron manhole cover when installed, should be a whole.