Find Verified Ductile Iron Lockable Manhole Cover Suppliers, Manufacturers and Wholesalers

We offer all sizes of manhole cover and also Gray cast iron material, round or square. Support customized.
we can provide OEM manhole covers for all applications need. We manufacture ductile iron manhole covers in a variety of sizes, shapes, and designs.

C250 Adjustable Subsidence-Prevention Ductile Iron Circular Manhole Cover (diameter 700) | Customized Round Cast Iron Sewer Cover For Street

This adjustable subsidence-prevention ductile iron circular manhole cover is ideal for sidewalks, non-motorized vehicle lanes, parking lots, road shoulders, curb drainage areas, municipal pipe networks, and other light-to-medium traffic zones. Manufactured from ductile iron, it offers excellent load-bearing capacity, impact resistance, and durability. The height can be adjusted according to installation and pavement elevation requirements, helping to improve the transition between the cover and the road surface while minimizing subsidence, vehicle bumping, looseness, and damage to the surrounding pavement.

Product Features

C250 Load Class: Tested to load class C250 with a test load of F greater than or equal to 250 kN.
Adjustable Structure: Height can be adjusted to accommodate road construction, asphalt paving, and future maintenance requirements.
Subsidence-Prevention Design: Helps improve subsidence, uneven road surfaces, and vehicle bumping around the manhole cover.
Ductile Iron Material: High strength and good toughness, adapting to long-term outdoor use and repeated loading.
Anti-Slip Surface: Features an anti-slip texture design to enhance safety for both pedestrians and vehicles.
Circular Design: Ensures even stress distribution, prevents the cover from falling into the well, and facilitates easy installation, opening, and maintenance.
Suitable for Light-to-Medium Traffic Areas: Ideal for sidewalks, parking lots, road shoulders, curb areas, and municipal maintenance access points that meet C250 load class requirements.

D400 Adjustable Subsidence-Prevention Ductile Iron Manhole Cover and Frame (�?800)

This �?800 D400 adjustable subsidence-prevention ductile iron circular manhole cover is designed for heavy-duty traffic areas, including urban roads, motorways, parking lots, municipal pipe networks, and electric power inspection wells. Manufactured from ductile iron and equipped with a matching frame and adjustable structure, it can be fine-tuned to match construction and road surface elevations. This effectively resolves common issues such as elevation differences, subsidence, vehicle bumping, looseness, and noise around the manhole cover.

Originally designed for electric power wells, the cover surface can be cast with the word "Electric Power," custom logos, or specialized patterns as required by the project. It is also highly suitable for other underground utility inspection wells and municipal infrastructure projects that meet D400 load requirements.

Product Features

D400 Load Class: Tested to load class D400 with a test load of Fâ?¥400 kN, making it ideal for roads with frequent vehicle traffic and heavy-duty zones. D400 is typically used in vehicular traffic areas.
Adjustable Subsidence-Prevention Structure: Can be adjusted during road construction, pavement laying, and future maintenance to ensure a seamless transition between the manhole cover and the road surface.
Ductile Iron Material: Offers excellent strength, toughness, impact resistance, and durability, perfectly adapting to repeated vehicle rolling and road vibrations.
Circular Design: Ensures even stress distribution, prevents the cover from falling into the well, and facilitates easy installation and maintenance.
Anti-Slip Surface Texture: Features an anti-slip texture design to enhance safety for both vehicles and pedestrians.
Electric Power Well Adaptation: Can be cast with utility identifiers such as "Electric Power" for easy identification and daily management of underground facilities.
Matching Frame: The cover and frame are designed as a matched set to simplify on-site installation and project integration.
Customization Supported: Custom cover text, logos, surface coatings, packaging, and structural details can be tailored to project requirements.
Note: This size is currently available in a 40-ton load-bearing specification. The D400 load class and final technical requirements are subject to the confirmed drawings, test reports, and project technical agreements.

D400 Ductile Iron Circular Manhole Cover | Adjustable Subsidence-Prevention Inspection Manhole Cover (diameter 780)

This adjustable subsidence-prevention ductile iron circular manhole cover is ideal for urban roads, motorways, parking lots, municipal pipe networks, and various heavy-duty traffic areas. Manufactured from ductile iron, it offers excellent load-bearing capacity, impact resistance, and durability. The height can be adjusted according to pavement elevations, effectively reducing elevation differences between the cover and the road surface, while minimizing subsidence, vehicle bumping, and looseness.

Product Features

D400 Load Class: Tested to load class D400 with a test load of F greater than or equal to 400 kN.
Adjustable Structure: Height can be adjusted based on road construction and pavement elevations.
Subsidence-Prevention Design: Helps improve subsidence and uneven road surfaces around the manhole cover.
Ductile Iron Material: High strength and good toughness, adapting to repeated vehicle rolling and road vibrations.
Anti-Slip Surface: Features an anti-slip texture to enhance safety for both vehicles and pedestrians.
Circular Design: Ensures even stress distribution, prevents the cover from falling into the well, and facilitates easy installation and maintenance.
Heavy-Duty Road Application: Meets D400 load class requirements and is suitable for motorways and similar areas.