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Upper sphere 20T Upper sphere 17T Upper sphere 15T
 
 
 

 
 

 

 
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  In production, in order to minimize the vertical sphere which can not avoid a little time-consuming, this was designed and produced the height-adjustable upper sphere (H~0m/m부터 H~1000m/m) in a mass-produced method and enhanced productivity, and also reduced the assembly parts when assembling manholes on site (the integration of upper slab and each height sphere), which reduced construction time and equipment, and water leakage, while the connecting assembly parts (female socket) undergo ductile casting and turning precision processing
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* Custom production for measures not mentioned
Division lower sphere Vertical sphere Upper sphere
Inner diameter(mm)(mm) Height
(H)		 Thickness
(T)		 Inner diameter(mm)(mm) Height
(H)		 Thickness
(T)		 Inner diameter(mm)(mm) Height
(H)		 Thickness
(T)
Small size 300 600~1000 150       300 200~500 150
500 600~1000 150       500 200~1000 150
600 600~1000 150~200       600 200~1000 150~200
700 600~1000 150~200       700 200~1000 150~200
No.1 900 500~1000 150~250 900 500~1000 150~250 900 0~1000 150~250
No.2 1200 1200~1500 150~300 1200 500~1000 150~300 1200 0~1000 150~300
No.3 1500 1500~1800 150~300 1500 500~1000 150~300 1500 0~1000 150~300
No.4 1800 1800~2000 150~300 1800 500~1000 150~300 1800 0~1000 150~300
No.5 2100 2000 150~300 2100 500~1000 150~300 2100 0~1000 150~300
 
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