Hebei Hankai 12x22x5 oil seal






1. Flood Prevention One of the primary functions of gully covers is to prevent flooding in urban areas. In cities where pollution and inconducive construction practices have made drainage systems more vulnerable, the use of appropriately sized gully covers can significantly reduce the risk of water accumulation, which not only risks property damage but also endangers public safety.
200mm gully cover

The uniformity of circular manhole covers also facilitates mass production. Since these covers are produced using molds, a circular shape allows manufacturers to streamline production, leading to lower costs and more efficient use of materials. Furthermore, the rounded edges help distribute weight evenly, making it easier for workers to lift and replace the covers without compromising safety.
manhole cover shape
