Cover size:500mm
Clear Opening:450mm
Frame size:595mm
SMC manhole cover are the abbreviation of sheet molding compound manhole covers, which are namely sheet molding compound plastic. It's made by the SMC special yarns, unsaturated resin, low shrinkage additives, fillers and various additives composition. In the early 1960s, SMC products firstly appeared in Europe around 1965. The United Sates and Japan have developed this technology. In China, we imported the foreign advanced production lines and production process for SMC in the late 1980s. SMC has excellent electrical properties, corrosion resistance, light weight, and engineering design easy, flexible, etc. Its mechanical properties can be comparable with some metallic materials, which are widely used transport vehicles, construction, electronics/ electrical and other industries.
Nice appearance
Beautiful appearance and rich colors; the cover is not sprayed in surface but painted in whole material so that the color can keep lasted.
Anti-theft
Non-recycle material, anti-theft naturally; the lock attachment can prevent tunnel products from losing, therefore city blackhole can be stopped totally.
Low noise
Harsh noise and rebounding free when car roll.
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