Ductile Iron Recessed DI Ring Round Cement Filled Monitoring Manhole Cover Rings

1. Material 
2.Ductile Iron GGG500-7 & 400-12 
3. Grey Iron GG20

Designs 
1. EN124 A15, B125, C250, D400, E600 and F900 
2. A60005 for casting design 
3. Major standards designs available 
4. As per customers' drawings or samples 

Process 
1.Molding boards 
2.Green sand with hand molding 

Coating 
1.Cold applied black bitumen 
2. Without coating
3. Coating as per customers' requirement 
4. Different accessories are available