· 400ton die casting,high density,heavy duty. The wall with uniform thickness  and no die surface porosity.
· New material of Aluminum Alloy without inclusions.
· Each impeller be inspection by Dynamic Balance.
· Adjustable angles for fan blades.
· Test by completed build-up axial fan, the air Performance Parameter  is truth and reliable.
· High static efficiency, Long lasting.
· The fan impeller can run in forward and reverse directions, and its air pressure and air volume remain basically unchanged.

· For fan which need to switch the air direction of the ventilation and exhaust system through the forward and reverse of the impeller.