It is used for the applications where circulation of the impeller is changeable and electric motor must be out of air-flow. Ball bearings and other accessories of this series are selected from long-life and most quality brandnames. Standardly it is produced as circular and both side flanged. However, optionaly it can be produced with variable diameters as depending on customers inquiry.
FAN CASE
Standardly it is manufactured by RAL st 37 steel sheet with variable thickness and in RAL 1003 (yellow) color. Depending on request can be produced by hot-dip galvanized or furnace paint.
IMPELLER
Hub of the blades are made by alloyed aluminium, optionaly can be made by steel. Impellers are thermoplastic, optionaly can be made by aluminium.