An apparatus for the dyeing of textile articles generally with a substantially rotating current circulation bath comprising a tank containing the dyeing bath provided with inlets to provoke circulation by means of fluids under pressure. Heating means are provided on the inside of the tank. The tank is autoclave shaped and supported about a horizontal bath provided on the inside of the tank by means of feeding means. A closing seal device is provided on an opening of the skirt of the tank for the loading and unloading of materials respectively to be treated and materials already treated.