Vertical Air Drafting Duct 
The vertical air drafting duct is mainly applied for separating light impurities from raw grains, such as grain husk, empty grains, grass seeds, sand and dust. It is usually used with vibrating sifter, plane rotating sifter and other cleaning equipment. It is designed according to the their screen width for better supporting use with other grain cleaing equipment.

Vertical Air Drafting Duct Working Principle
This machine is usually working with vibrating screen, rotary flat screen and other grain cleaning equipment, so the raw grain is conveyed into it through the screening equipment, and the light impurities are removed by the airflow in the air duct for the different suspension velocity of raw grain and foreign materials.

Vertical Air Drafting Duct Technical Parameters

Type	XFD80	XFD100	XFD120	XFD150
Output (t/h)	12	16	20	24
Air Volume (m3/h)	3000	4000	4800	5600
Dimensions (mm)	1035*1200*450	1235*1200*450	1435*1200*450	1800*1400*450