... ,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 ... flexible coupling, and the driving device consists of bearings, bearing-box, shaft, brass rings, stuffing, it can be oiled and ...