Round overflow cast iron manhole cover

Round overflow cast iron manhole covers are mainly used to collect rainwater and are mainly used in green belts. The round overflow cast iron manhole cover adopts the "ductile iron" technology, which has very good impact resistance and ductility. Therefore, the ductile iron overflow manhole cover has strong external pressure resistance and can be used normally in bad weather. Round overflow cast iron manhole covers are raised above the lawn and are mostly hollowed out, which enhances drainage and does not get blocked by sand, thin grass or leaves. Therefore, the overflow cast iron manhole cover has good drainage performance and is one of the important facilities for the development of sponge cities. Round overflow cast iron manhole covers have different sizes, Φ350, Φ500, Φ700 and so on. "Φ350" indicates the size of the diameter 350mm, "Φ500" indicates the size of the diameter 500mm, "Φ700" indicates the size of the diameter 700mm. Our company can customize a…