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MR900
Elite
The MR900 SMC sewer cover is engineered specifically for water treatment facilities and sewage systems where corrosive environments present ongoing challenges to infrastructure durability. Manufactured from Sheet Molding Compound (SMC) through high-temperature compression molding, this composite access cover provides a viable alternative to traditional cast iron covers in environments with high moisture and chemical exposure. The round design with a 900mm nominal diameter accommodates standard sewer access points found in municipal water treatment plants, industrial wastewater facilities, and commercial drainage systems.
This sewer cover weighs approximately 35-40 percent less than equivalent cast iron covers while maintaining comparable load-bearing capacity, which contributes to reduced installation time and lower transportation costs for commercial procurement teams. The composite material composition includes fiberglass reinforcement, unsaturated polyester resin, and mineral fillers, creating a homogeneous structure that resists galvanic corrosion and chemical degradation commonly encountered in water treatment environments.
Parameter | Specification |
|---|---|
Model | MR900 |
Material | SMC (Sheet Molding Compound) |
Shape | Round |
Clear Opening | 600mm |
Overall Diameter | 900mm |
Cover Thickness | 50mm |
Load Class (EN124) | D400 |
Test Load | 400 kN |
Weight | 32 kg |
Operating Temperature Range | -40°C to +80°C |
Flammability Rating | V-0 (self-extinguishing) |
Electrical Insulation | ≥10⊃1;⊃2; Ω |
Water Absorption | ≤0.5% |
This SMC sewer cover meets the EN124 D400 load class standard, which means it has undergone testing at 400 kN of applied load without structural failure. The multi-layer reinforcement design distributes weight evenly across the cover surface, making it suitable for areas with occasional vehicle traffic within water treatment plant premises. The integral frame and cover assembly includes positioning lugs that prevent lateral movement and ensure proper seating.
Unlike ferrous materials that rust and degrade in sewage environments, SMC composite material demonstrates resistance to a wide range of chemicals commonly found in water treatment facilities, including hydrogen sulfide (H₂S), methane, and various organic acids. The material does not support microbial growth or suffer from galvanic corrosion when exposed to different metals in underground installations. This resistance translates to longer service life and fewer replacement cycles for facility maintenance departments.
The top surface features an anti-slip pattern with raised cross-shaped protrusions that provide traction for maintenance personnel during wet conditions. The composite material is electrically non-conductive, which adds a safety layer for workers accessing electrical utility vaults located near water treatment infrastructure. The cover includes two built-in lifting points for standard hook tools, and lockable versions are available to prevent unauthorized access to restricted utility areas. When properly seated, the cover produces minimal sound deflection under traffic loads compared to cast iron alternatives.
SMC sewer covers serve multiple access points within water treatment facilities, including sewage pump stations, sedimentation tank access ports, sludge handling areas, and chemical dosing stations. The corrosion-resistant properties make them particularly suitable for locations where cast iron covers have historically experienced accelerated degradation due to hydrogen sulfide gas exposure. Municipal water authorities and industrial wastewater operators specify these covers for new construction projects as well as replacement programs targeting infrastructure renewal.
Additional applications include stormwater management systems, combined sewer overflow structures, and utility vaults housing water monitoring equipment. The lightweight nature of the material also benefits facilities where manual handling by maintenance staff is required, reducing strain injury risks associated with heavy cast iron cover removal and replacement.
This SMC sewer cover holds CE certification and complies with the EN124 European standard for gully tops and manhole tops for vehicular and pedestrian areas. Products have undergone testing by international third-party certification organizations to verify load performance, material durability, and dimensional accuracy. The manufacturing facility operates under ISO 9001 quality management system guidelines, ensuring consistent production quality across batch orders.
Commercial procurement teams can order the MR900 model in standard black color with minimum order quantities starting from 50 units. Custom color options are available for volume orders exceeding 200 units, with typical lead times of 15-20 days for standard production and 25-30 days for customized specifications. The manufacturer offers logo embossing services for municipal authorities or utility companies seeking branded infrastructure components. Additional customization options include special locking mechanisms, identification labels, and modified dimensions to match existing infrastructure specifications.
The MR900 model is rated to EN124 D400 load class, meaning it withstands a test load of 400 kN. This rating makes it suitable for installation in areas with vehicle traffic within industrial and municipal facilities.
SMC composite material does not rust or corrode in the presence of moisture, hydrogen sulfide gas, and other chemicals commonly found in sewage systems. Cast iron covers typically require replacement every 5-10 years in aggressive sewage environments, while SMC covers demonstrate service life of 20+ years under similar conditions based on accelerated aging tests.
Standard production lead time is 15-20 days for orders of 50-500 units. Orders requiring custom colors, logos, or special dimensions typically require 25-30 days from order confirmation to shipment. The manufacturing facility is located near major port facilities, which contributes to efficient export logistics and reduced transit times.
Yes, logo embossing and custom identification markings are available for volume orders. Customers can provide their logo files in vector format, and the manufacturer creates custom mold inserts to reproduce the design on the cover surface. This service is commonly used by municipal water departments and utility companies that require branded infrastructure components.
The SMC material maintains structural integrity across a temperature range of -40°C to +80°C, making it suitable for installation in most climate zones. The coefficient of thermal expansion is consistent with concrete and masonry structures, reducing the risk of fit issues during seasonal temperature changes.
