The nodular iron sunken invisible manhole cover is the inlet grille on the rainwater manhole, composed of manhole frame and grates.The nodular cast iron sunken invisible manhole cover is the inlet grille on the rainwater inlet, consisting of manhole frame and grates.The grates have flat grates, partial ditch type, joint type, etc. According to the installation form and quantity, have single grates, double grates and multiple grates.
The nodular iron rainwater grates is made of ductile iron QT500-7 casting. The cast iron by globalization, making the cast iron structure combine more closely, higher density, stronger strength and better toughness. Its comprehensive performance is close to steel, excellent performance.
Nodular cast iron rainwater grates are mainly used in municipal road drainage, collecting Wells, communities, factories and mining enterprises, and where there is rainwater and water, drainage pipes should be established, so that more water on the road is discharged into the underground sewage pipe network. Manhole grates are an essential material for construction engineering.
Characteristics of nodular iron rainwater grates:
1, Long life: corrosion resistant, maintenance free and available for more than 50 years.
2, bearing capacity: bearing capacity far exceeds other products, large bearing pressure, prevent breaking, vehicle falling and other safety accidents.
3, anti-theft: ordinary anti-theft design, new anti-theft design, manhole cover and manhole frame using high strength bolt connection, integrated design.
4, anti-hop cover: the grates adopts anti-proof rubber ring so that the vehicle has no noise when passing and meets the environmental protection requirements.
Good safety: manhole grate and manhole frame closely combined, will not produce jumping, seesaw, displacement and other phenomena, no noise, safe and reliable.