A diverter valve device (10) including a body (12), in which a chamber (14) is defined, which is able to be flown through by a pressurized fluid flow; a rotatory plug (16), which is mounted on the body (12) and is adapted to rotate about a rotation axis (X-X); at least one inlet (18), which is provided in the body (12) and is fluidly arranged upstream of the chamber (14); and a pair of outlets (20a, 20b), which stem from the body (12) and are fluidly arranged downstream of the chamber (14). The body (12) has a substantially axial seat (22a) and a substantially radial seat (22b), which are fluidly arranged between the chamber (14) and one outlet (20a) and the other outlet (20b), respectively. The plug (16) is suited to assume a first and a second operating condition, in which it (16) respectively frees and obstructs the substantially axial seat (22a) as well as respectively obstructs and frees the substantially radial seat (22b).