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This sturdy ductile iron manhole cover is made of high-strength, elastic QT500-7 cast iron. It is manufactured through ballizing treatment, annealing, and precision casting, ensuring exceptional durability and performance. The cover features high load-bearing capacity, impact resistance, corrosion resistance, anti-theft design, anti-slip surface, and noise reduction, making it ideal for a wide range of underground inspection wells in municipal, residential, park, parking lot, and roadway applications.
| Spheroidal graphite cast iron round manhole cover | |
| product size | Can be customized according to customer requirements In-Stock Sizes：φ300mm φ400mm φ500mm φ600mm φ700mm φ800mm φ900mm φ1000mm |
| Packaging Dimension | Package according to the customer’s requirements, model and quantity. |
| weight | Different sizes, different weights. We will provide the weight based on the customer’s requirements for each model. |
| modes of packing | Simple bundling / Tray packaging |
Material: QT500-7
Structure: Integral / Divided, equipped with a rubber shock-absorbing ring
Shape: Circular / Square
Load-bearing Grades: A15, B125, C250, D400, E600, F900 (customizable upon request)
Surface Treatment: Asphalt paint / Rust-proof paint
Operating Temperature: -30℃ to +80℃
Performance Features:
High Strength and Elasticity
The spherical graphite structure provides excellent tensile, bending, and impact resistance compared to ordinary cast iron, minimizing the risk of fractures and extending service life.
Stable Load-bearing Capacity
Compliant with standards for municipal main roads and areas with heavy vehicle traffic. The anti-theft locking mechanism requires special tools to open, effectively preventing theft and loss.
Anti-slip and Wear-resistant
The surface pattern ensures a secure grip even in wet conditions and maintains durability under long-term traffic.
Applicable Scenarios:
Urban municipal roads, expressways, and main thoroughfares
Residential areas, parks, schools, hospitals, and public squares
Parking lots, gas stations, and industrial parks
Inspection wells for water supply, drainage, electricity, communication, gas, and heating systems
Get in touch with us for product inquiries, customized solutions, partnership opportunities, and professional support to help your projects succeed.
Multiple transportation options: road, sea, and air freight to meet diverse customer requirements.
High-load, corrosion-resistant, theft-proof, lightweight manhole covers, customizable.
Premium ductile iron and composite resin provide excellent load-bearing capacity.
Surface treatment and material selection ensure long-term durability.
Lightweight for easy transport and installation, reducing construction costs.
Available in multiple sizes and specifications to meet diverse project requirements.
