Recessed D400 Manhole Cover Double Triangle Screw Locking For Residential Areas
Triangular manhole cover is a removeable lid, which has a main special-function that can keep out unauthorized persons and materials falling into well. Triangular manhole covers have many perfect performance, high strength, good-looking appearance, easy to use, guard against theft, Acid and alkali resistance, corrosion resistance, wear resistance, rolling resistance, long service life etc.
1. No inherent scrap value thus reducing risk of theft.
2. Moderate weight and easy installation.
3. Can be used in -30℃ to 70 ℃degrees environment.
4. 30 years of service life.
5. Tested by national security agencies. Compressive, bending and impact resistant. Heat, cold, acid, etc.
6. Corrosion resistance, meet the needs of environmental protection, and reduce the exploitation of mining resources; beautify the city, classify the coloring, and enhance the taste of the city.
Tel: +86 519 81182318
Add: No. 502, Mid Taihu Road 19, Xinbei District, Changzhou City, JiangSu Province, CHINA