Abstract: The installation for the heat-setting of textile yarns comprises a tubular heating and steam-treatment chamber (1) partially filled with water and connected at its opposite ends to two tubular cooling chambers, these chambers being traversed longitudinally by a movable belt (4) conveying the yarn to be treated. The belt (4) extends at a distance (D) above the longitudinal axis (X-X') of the heating and treatment chamber (1) which is between 1/10 and 1/6 of the diameter of the chamber. The width of said belt (4) is greater than 60% of the diameter of the chamber (1), and the water level (N) in the chamber (1) is situated at more than 1/10 of its diameter beneath the longitudinal axis (X-X') of this chamber (1). Use for increasing the productivity of the installation and for improving the quality of the treated yarn.

Abstract: The installation comprises two identical heat-setting chambers (1, 2). The chambers (1, 2) are connected to each other by way of ducts (8, 8a) through which the steam extracted from inside one of the chambers is delivered to the other chamber, so as to mix the steam. Use for increasing productivity and obtaining yarns treated under identical conditions by two separate installations.