According to PCB (Pollution Control Board), direct exhaust of powder to atmosphere via cyclone is harmful to human and to the environment. Hence, AFU (After Filter Unit) is suggested for further separation of powder particles which has exhausted from cyclone. The particle size of powder is 5 microns or less. Normally, powder manufacturer maintain the particle size of powder below 5 microns. This unit contains filters which arrest the powder particles and fresh air is exhausted in atmosphere.

According to PCB (Pollution Control Board), direct exhaust of powder to atmosphere via cyclone is harmful to human and to the environment. Hence, AFU (After Filter Unit) is suggested for further separation of powder particles which has exhausted from cyclone. The particle size of powder is 5 microns or less. Normally, powder manufacturer maintain the particle size of powder below 5 microns. This unit contains filters which arrest the powder particles and fresh air is exhausted in atmosphere.