main usage:it is suitable for ventilating，air exchanging for industrial and mining enterprises，agriculture, civil construction, textiles，chemicals，metallurgy，refrigeration equipments，etc..
* it adopts the advanced technology and designed based on the sfii series to be the generation iii products.
* jointly developed with shanghai jiaotong university, the blade adopts 3d optimization design，using toothed blades，and operates with lower noise，the wheel hub is made of integral die casting.
* the impeller is formed by connecting the blades and the hub with bolts .the weight is light, quick start, large air volume，and high e衍ciency.
* the motor adopts an enlarged model，the appearance of which uses a 3d design and better air flow performance.
* the transported medium is air and other gases that do not ignite spontaneously and are harmless to the human body and do not corrode the steel.no viscous materia}is allowed in the gas，dust and hard particles are not more than 150mg/m³，and the medium temperature must not exceed 60℃.