FDU degassing units are an automated metal treatment system for the environmentally-friendly degassing and cleaning of aluminium and copper alloys.

FDU units use the impeller principle with a patented rotor which creates fine inert gas bubbles and mixes them with the melt. These fine bubbles are distributed homogenously throughout the melt without disturbing the surface maximising the contact area between the gas and the melt. The effectiveness of the Foseco FDU means that higher levels of degassing and cleaning can be achieved and treatment times can be reduced.