... 5KW,Weight:33~455KG,380V/440V,50Hz/60Hz,CBZ series explosion-proof axial centrifugal fans for marine use are designed and ... according to GB 11799-89(Marine Explosion-proof Axial Centrifugal Fans), and general description and explosion-proof electrical equipment d of GB3836-83 ... oil fog and other corrupt air supply or extracition.Theses explosion-proof fan series are best suited to pumping out gas ...