Abstract: Apparatus for treating textile material for example bleaching or dyeing woven or knitted fabric in rolls or yarn on reels, comprises a horizontal autoclave tank having a removable cover at one end. The tank is divided into a treatment compartment and an expansion compartment and an expansion compartment by a partition of which the height is adjustable to vary the amount of liquid in the treatment compartment. The material to be treated is placed on a horizontal perforated cylindrical holder which is closed at one end and at the other end has a pump impeller on a shaft driven by an external motor to force liquid into the cylindrical holder whereupon it flows out through the material being treated. An injection impeller on the same shaft draws from the expansion compartment liquid which has passed over the partition.