In municipal engineering, key traffic routes, and areas with frequent heavy vehicle traffic, installation efficiency, stability, and anti-theft performance are critical indicators of a manhole cover’s value. LuZhongBao’s 700×900×110 ductile iron snap-ring round manhole cover redefines installation standards with its innovative snap-ring quick-locking system. The product is integrally cast from QT500-7 high-strength ductile iron, strictly complies with GB/T 23858 national standards, and features a unique outer-square-inner-round structure (700×900mm rectangular frame Φ700mm round opening) that meets large round opening coverage needs while providing a larger load dispersion area. The 110mm deepened ring integrates precision snap-grooves, enabling instant cover-ring engagement via high-strength spring steel snap-rings—eliminating traditional bolt fixation, boosting installation efficiency by over 80%, and entirely avoiding maintenance issues from tool dependency or bolt corrosion.
The ring base employs an extended flange design (width 250mm) to directly transfer wheel loads to the road structural layer, effectively preventing peripheral asphalt settlement. The cover surface features deep anti-slip patterns and eco-friendly coating, balancing safety and durability. With core advantages of one-second locking, zero-tool installation, and lifetime maintenance-free operation, LuZhongBao’s snap-ring cover stands as an efficient solution for modern smart city infrastructure.
