... 380V/440V,50Hz/60Hz CBZ series marine explosion-proof axial fans 1. PrefaceMarine Axial fan:Volume:1200~138000m3/h,Pressure:230~1220Pa ... 78~1068KG,380V/440V,50Hz/60Hz,CBZ series explosion-proof axial flow fans for marine use are designed and manufactured ... according to GB 11800-89(Marine Explosion-proof Axial Flow Fans), and general description and explosion-proof electrical equipment ...