This work was devoted to the study of the dynamic and static behavior of a de vortex plasma torch with a button type cathode (power level below 60 kW) and a tubular anode. The influence of the evolution of arc current I, gas flow rate G, and nature, and electrode polarities on the dynamic and static behaviors was investigated. To characterize the dynamic behavior of the torch, a set-up was developed to measure the fluctuations of are voltage U and current, plasma jet radiation, and acoustic pressure. A frequency peak (around 4000 Hz) was found in each signal and was characteristic of the arc column-anode wall disruptions. The frequency change of this peak us. I, anode internal diameter d, and G was studied and its variation represented by semiempirical relationships. To characterize the static behavior of the torch, the variations of U and thermal efficiency eta with I, G, gas nature, and anode design were studied and also represented by semiempirical relationships.