The EVOLUTION NO-SMOKE ATEX has been designed and built in compliance with the 98/37/CE Machinery Directive and the “”ATEX”” 94/9/CE Directive. It is classified on the basis of the ATEX Standard according to the identification string in question. The EVOLUTION NO-SMOKE ATEX arms for fume extraction have been designed to convey the locally produced pollutants, in potentially explosive atmosphere, towards specific filtering and deodorizing systems. The use of suitable materials to allow a complete earth connection of the electric charges, which are generated during the passage of air in the pipes and the absence of electric components makes the EVOLUTION NO-SMOKE ATEX arm compatible for use in zone 21, 1 and with dusts classified st3