... 3.approvals:CCC,CE, 1. Impeller7-sickle bladed poled die-cast aluminum impeller, sizes from 200 to 810mm, available in 50/60Hz ... equipment with short bell mouth, high flexibility by variation of blade angle and speed of motor, available in both air row ... 60Hz.5. ApplicationVentilation, air conditioning, heating technology, drying, cooling, agriculture. Axial fan with frame