Explosion-proof fan BHF top margin to adopt fiberglass as the base material and a new explosion of new technology, can effectively prevent the generation of static electricity and magnetic friction and heat hit explosion-proof enhanced performance. Using the original energy-damping logarithmic linear impeller inlet bell device and pressurized fluid linear damping principles of design principles designed snail-like hollow shell shock and other new technologies, in line with the principles of fluid mechanics and aerodynamics, improved fan efficiency, reduced flow resistance loss. Explosion-proof fan BHF top margin pressure series explosion-proof electrical products according to the National Quality Inspection Center in accordance with GB3836.1-2000 "Electrical apparatus for explosive gas atmospheres - Part 1: General requirements" of the product sample surface insulation resistance values ??meet explosion-proof standards; according to Hefei Universal electromechanical product testing in accordance with the provisions of GB19761-2009 hospital and JB / T10563-2006 determines this section FRP high-pressure series of explosion-proof fan efficiency, total pressure, air flow measured indicators meet the standards. , To ensure the performance of the original glass blower on the basis of the surface resistance value of each component so that it is less than 1X109 ohms, effectively prevent static electricity and magnetic friction and heat explosion hit, vertical burning no more than 15S, in line with the new national explosion-proof glass blower requirements