Device for controlling a gas dispensing opening formed in a body of a torch apparatus, said control device comprising a valve of axis X, intended to be mounted via a helical connection in a passage of said body which communicates with said dispensing opening , and to be moved by means of an operating head between a position that closes the dispensing opening and a position that opens the dispensing opening , the operating head being equipped with means for limiting the travel of the valve moving in the direction of the position that closes the dispensing opening , the operating head comprising a cylindrical drive ring extending in the X axis, the means for limiting the travel of the valve comprising a flywheel rotatably mounted about the X axis on the drive ring and having an inner wall adjusted to the diameter d of the drive ring , characterized in that the means for limiting the travel of the valve further comprise: - at least one notch , of axis Y perpendicular to axis X, formed in the circumferential wall of the drive ring , said notch being delimited at least by a bottom extending in a plane parallel to axis X, two opposite walls and an inner wall , - at least one groove , of length L, provided in the inner wall of the flywheel , having first and second ends between which its depth decreases on the basis of a clockwise rotation of the flywheel around the drive ring , and - at least one ball slidably mounted in said notch between an active position in which a portion thereof is housed in the notch and a portion is housed in the groove , and an inactive position in which it is housed entirely in the notch . the operating head comprising a cylindrical drive ring extending in the X axis, the means for limiting the travel of the valve comprising a flywheel rotatably mounted about the X axis on the drive ring and having an inner wall adjusted to the diameter d of the drive ring , characterized in that the means for limiting the travel of the valve further comprise: - at least one notch , of axis Y perpendicular to axis X, formed in the circumferential wall of the drive ring , said notch being delimited at least by a bottom extending in a plane parallel to axis X, two opposite walls and an inner wall , - at least one groove , of length L, provided in the inner wall of the flywheel , having first and second ends between which its depth decreases on the basis of a clockwise rotation of the flywheel around the drive ring , and - at least one ball slidably mounted in said notch between an active position in which a portion thereof is housed in the notch and a portion is housed in the groove , and an inactive position in which it is housed entirely in the notch . - at least one notch , of axis Y perpendicular to axis X, formed in the circumferential wall of the drive ring , said notch being delimited at least by a bottom extending in a plane parallel to axis X, two opposite walls and an inner wall , - at least one groove , of length L, provided in the inner wall of the flywheel , having first and second ends between which its depth decreases on the basis of a clockwise rotation of the flywheel around the drive ring , and - at least one ball slidably mounted in said notch between an active position in which a portion thereof is housed in the notch and a portion is housed in the groove , and an inactive position in which it is housed entirely in the notch . <EOS>