• Quietness during Passage: The special integrated gasket absorbs the dynamic shocks of tires, eliminating the annoying metallic noise and bouncing typical of traditional manhole covers.
• Operator Safety: The 90° locking system prevents accidental closure of the cover during work inside the manhole, offering total protection for technical personnel.
• Rapid Inspection: The hinge allows for a smooth opening up to 110°, leaving the 60 cm clear opening completely free of obstacles for easy entry.
• Suction Resistance: The automatic locking mechanism ensures that the cover remains attached to the frame, preventing the vacuum effect caused by the passage of fast vehicles from lifting the manhole cover.
• Road Surface Longevity: The circular shape discharges tensions radially, reducing the formation of cracks in the surrounding asphalt and limiting road restoration interventions.

The h638_16 model finds its ideal application in high-traffic urban and extra-urban roads, roundabouts, lay-bys, bus terminals, and parking lots for industrial vehicles. It is the standard solution used by utility companies and management bodies for securing sewage networks, water inspection chambers, and primary technological ducting.

Choosing this manhole cover means opting for a product that is **modern, certified, and oriented towards reducing noise pollution**. With an optimized weight of 57 kg achieved thanks to the elastic properties of ductile iron, it guarantees the same resistance as an old grey iron manhole cover weighing twice as much. It is the perfect investment for urban centers and residential areas where road surface stability and silence during vehicle transit are fundamental requirements.

What is meant by loading class D400?

Class D400, according to the European standard UNI EN 124, establishes that the manhole cover is designed and tested to withstand a test load of 400 kN (equivalent to approximately 40 tons). It is the mandatory category for the carriageways of main roads and transit areas for heavy vehicles.

Does the gasket resist road chemical agents?

Yes, the gasket is made of a special high-resistance elastomer, formulated to tolerate the degrading action of hydrocarbons, de-icing salt, thermal shocks, and wastewater, maintaining its damping properties over time.

Is the 60 cm clear opening compliant for technician entry?

Absolutely yes. The 600 mm useful diameter perfectly meets European safety standards to allow the safe passage and access of an operator equipped with a harness and personal protective equipment.