Yaran Casting

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دریچه منهول چدنی 63 در 63 سانتی‌متری با تحمل بار 25 تن و وزن 90 کیلوگرم

Cast iron manhole cover 63 x 63 cm with a load capacity of 25 tons and a weight of 90 kg

Valve dimensions

63*63 cm
Rim dimensions

73*73 cm
Weight

90 kg
Endurance

25 tons
  • Manhole Cover Shape: Rectangular / Square / Circular
  • Manhole Cover Size: 500 × 700 mm / 600 × 800 mm / 500 × 500 mm / 400 × 400 mm / Ø200 mm / Ø600 mm / Ø800 mm
  • Load Capacity: Traffic Rated / Non-Traffic Rated / 12.5 Tons / 25 Tons / 40 Tons
  • Cover Connection Type: Hinged / Non-Hinged
  • Load Class: Class A / Class B / Class C / Class D
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نام و نام خانوادگی
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Choosing the right manhole cover is one of the most important steps in urban infrastructure, civil engineering, and utility projects. This guide provides comprehensive information about load classes, installation procedures, key purchasing considerations, and the advantages and disadvantages of polymer manhole covers to help you make the best choice.

Manhole Cover Load Classes According to Standard 14148

Based on National Standard 14148, manhole covers are manufactured in different load classes. Each class is designed for a specific application, and the technical experts at Yaran Foundry can help you select the most suitable class for your project.

Available Load Classes

  • Class A – Non-Traffic | Load Capacity: 1.5 tons | Suitable for sidewalks
  • Class B – Non-Traffic | Load Capacity: 12.5 tons | Suitable for parking areas and sidewalks with light vehicle traffic
  • Class C – Semi-Traffic | Load Capacity: 25 tons | Suitable for areas adjacent to roads
  • Class D – Traffic | Load Capacity: 40 tons | Suitable for vehicle traffic lanes
  • Class E – Traffic | Load Capacity: 60 tons | Suitable for ports and docks
  • Class F – Traffic | Load Capacity: 90 tons | Suitable for airports
Note: Polymer manhole covers are manufactured up to Class D.

How to Install a Polymer Manhole Cover

  • Prepare the Installation Area: Ensure the surface is level, clean, and free of obstructions.
  • Install the Frame: Position the frame securely and ensure it is perfectly level.
  • Place the Cover: Make sure the cover sits firmly on the frame without any movement or wobbling.
  • Final Inspection: Check the level alignment, ensure there are no leaks, and verify proper functionality.

Key Considerations Before Buying a Polymer Manhole Cover

  • Choose the appropriate load class based on the intended application.
  • Purchase from a reputable, standards-compliant manufacturer such as Yaran Foundry.
  • Avoid products manufactured from recycled materials.
  • Seek technical consultation to ensure the correct product selection.

Advantages of Yaran Foundry Polymer Manhole Covers

  • Lighter weight than cast iron and concrete covers
  • Cost-effective solution
  • Excellent resistance to chemicals
  • Rust-proof and ideal for humid environments
  • Electrically insulating and non-conductive
  • High resistance to UV radiation and sunlight
  • Withstands temperatures from -56°C to +220°C
  • Clean and aesthetically pleasing appearance
  • Noise-free during vehicle passage
  • Custom logo branding available
  • Manufactured in a wide range of sizes
  • Compatible with various manhole systems
  • Theft-resistant

Disadvantages of Polymer Manhole Covers

  • Cannot be detected by metal detectors if buried
  • Maximum load capacity is limited to 40 tons (Class D)

  • Non-recyclable

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