Prevention of noise and separation of the cover from manhole Solid locking system without loosening and play phenomena
Noiseless serrated locking manhole cover ∮648
Size
∮648, ∮766
Material
Cover , Base plate – Nodular graphite iron (GCD 500)
Static load capacity
Over 45 tons
Customer management
Possible to inscribe local government’s logo and letters
Place of origin
Mark on the back of the cover and the top of the base plate
Key Technology
Preventing noise and separation by precision machining (0.02mm) using CNC high-speed automatic vertical lathe(SKT-V110) on the cover and the contact areas of the side of the base plate The adhesion is excellent and noise and car accidents caused by the separation and damage of the cover can be prevented. The gap between cover and base plate is so minimized that the inflow of the alien substance is prevented
