TVS-400 series is a combination of powder conveyor andsieving station, used for explosive metal powder reclaim purpose in safe working area. Lots of Titanium and Aluminium powder can be considered to be recycled for re-use after 3D printing finished. During the sieving job processing, the sieving inside environment have to be considered as a hazardous area Zone 20, thus explosion proof is necessary for this powder sieving machine.