This machine used for powder collect purpose. Lots of Titanium and Aluminium powder can be considered to be recycled for re-use after 3D printing finished. During the recycle job processing, the printer inside environment have to be considered as a hazardous area Zone 20, explosion proof is necessary for this powder conveyor. For keeping healthy of operator during the powder transfer from printer to bin, this machine had been designed automatically process inside. Powder will not be touched by operator's eye, skin for worker's safer operation. A high pressure of double frequency fan had been used in this machine. With advantage of long time continuous working, Strong power, high efficiency and low noise. Valve sensor designed for opening automatically. Self-clean function make HEPA filter longer life with pressure gauge monitoring its working status.