Structural features: double air inlet after the impeller, there are two kinds of color steel plate and double-layer sound-absorbing board; There are two structures: internal motor and external motor.  
Number range: NO.250-1400# A total of 16 numbers.
Air volume range: 900-350000m3/h 
Full pressure range: 170-4000pa
Suitable for use: It is mainly used in general ventilation of factories, power plants, buildings, kitchen fume extraction, and fire smoke exhaust.
Use environment: no corrosion, no spontaneous combustion, no viscous substances when conveying air, medium temperature generally does not exceed 80℃. When used for fire smoke exhaust, it can ensure continuous operation for not less than 30 minutes under the condition that the ambient temperature reaches 280℃; The particles contained in the medium are not more than 150mg/m3. (Can be customized explosion-proof, anti-corrosion, high temperature resistance structure)