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Technology

Fan selection


General information on fan selection, system and fan characteristics


Pressure curve for connection types B, C, D


Centrifugal fans


Available power ranges and outlet positions


Centrifugal fan designs


Impeller types


Type codes 


Start-up, control, installation, material, surfaces, explosion protection tolerances


Ex zone classification


Impeller types general


Axial fans


Available power ranges


Axial fan designs 


Axial impeller types


Blade position, multi-stage


Type codes and ordering details 


Directives, start-up times, explosion protection, material and surfaces, instability range


Tolerances


Silencing  


General information on silencing


Silencer types, sound enclosures, absorption values


Silencer selection, attenuation


Pressure loss, K-factor


Splitter silencers table


Circular silencers table


Sound enclosures 


Techhnology


Formulas and units


Installation types, outlet duct, loss factor 


Flow loss 


Sound generation


Sound propagation free field


Sound level estimation


Drive motors 


Altitude correction


Gas mixtures


Vibrations


Conveying fan, dirt


Vibrations troubleshooting


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