CBL Marine Exlposion proof Centrifugal Fan CBL Explosion-proof Marine fan are designed and manufactured according to GB11799-89 Marine explosion-proof axial flow fans GB3836.1-2000 Electrical apparatus for explosive atmosphere , GB3836.2-2000 Electrical apparatus for explosive atmospheres, and explosion-proof electrical equipment“d” .Explosion-proof centrifugal ventilator fan have been examined and proved up to standard by the Explosion-proof Inspection Authority of the PRC and have got the certificate of inspection. They have also been examined by the register of shipping of RC and have got the certificate.