Specification of Concrete Pumps Cleaning Sponge Ball Name Rubber sponge cleaning ball Size DN50 (2inch) soft ,hard ,medium soft OD 60mm DN80 (3 inch) soft ,hard ,medium soft OD95mm DN100 (4 inch) soft ,hard ,medium soft OD124mm DN125(5 inch) soft ,hard ,medium soft OD150mm DN150(6 inch) soft ,hard ,medium soft OD175mm Other sizes and types upon request Material Natural Rubber Application Cleaning the pipeline of concrete pump and concrete pump truck in construction work equipment Serving brands of mounted truck concrete pump and concrete pump Sany,PM,Zoomlion,Schwing,CIFA and so on Application of Concrete Pumps Cleaning Sponge Ball (1)Power plant: condenser cleaning (2)Sea: Sea water desalting (3:Pipe and machinery cleaning: used for cleaning the softness and hardness settlings of the copper pipe,steel pipe,Titanium tube,etc 7expansion ratio 40°C*48h diameter 10% max 8.specific gravity dry state 0.5, liquid state 0.9–1.1