Ductile iron manhole covers are mainly used in deep wells and sewer openings in urban roads to prevent dangers when pedestrians or vehicles pass through. The application of manhole covers requires regular inspections.

Characteristics of ductile iron manhole covers:

1. These covers can effectively enhance the physical properties of cast iron, with excellent plasticity and toughness, and higher strength than carbon steel.

2. Anti-theft measures are implemented at the connection points of the covers to prevent theft, which can lead to hazards and unnecessary losses.

3. They have superior corrosion resistance and oxidation resistance compared to cast steel products, resulting in a longer service life.

4. The material and manufacturing process are incomparable to ordinary manhole covers. Each cover goes through careful design, production, and manufacturing.

5. They produce low noise as the contact and engagement surfaces between the cover and frame directly act on the T-shaped rubber strip, reducing noise through elasticity and rigidity.

6. They have enhanced safety with a surface pattern that protrudes 3mm, providing good slip resistance.

7. They can prevent displacement of the ductile iron covers. The frame includes four bolt holes evenly distributed at 90 degrees. Each set is equipped with four anchor bolts to prevent displacement caused by mechanical compaction during road construction.