Spherical Graphite Cast Iron Manhole Cover
This ductile iron manhole cover's flake graphite is enhanced with metal magnesium to improve tensile strength and seismic resistance. Its excellent weight-to-strength ratio reduces transportation costs and simplifies handling.





Technical Specifications
Product Overview
High-Performance Ductile Iron Solutions
These spherical graphite cast iron manhole covers are engineered to provide superior tensile strength and excellent weight-to-strength ratios through magnesium-enhanced metallurgical processing. Designed for demanding municipal and industrial environments, they offer advanced anti-theft, anti-skid, and anti-displacement features for maximum safety. Each unit is finished with non-toxic, water-soluble black paint to ensure durability and resistance to harsh outdoor conditions.
Technical Specifications
Standard Dimensions
- 850x850mm
- 350x350mm
Key Material Metrics
- Supported Load Classes
- C250D400
Design & Features
Available Configurations
- Single circlip
- Sheet lock
- Latch lock
- Anti-settling
- Double layer
- Square
- Groove cover plate


