... :870~3500r/min, Pressure:490~1800Pa, Shipbuilding Fan blower for shipyard use Draft fan:Weight:25~352kg,Volume:500~21000m3/h,Speed ... CBZ aeration facilities have been CSS certified by the Anti-Explosion Examining Centers of ABS, BV, DNV, GL, KR, LR, NK ... .318A,Jiushui Road,Licang District,Qingdao,Shandong province,China Shipbuilding Fan blower--Centrifugal ...