Abstract: A compressor drum for an axial turbo-machine includes a hollow body generally symmetrical in revolution about its axis of rotation and forming a shell at the periphery of which are arranged a plurality of parallel rows of vanes, each row corresponding to one stage of the compressor. Each vane includes at its root an attachment platform housed in a corresponding opening made in the shell of the hollow body. The outer surface of each platform is flush with the outer surface of the shell at the edge of the opening and each platform is attached to the hollow body by welding between the outer edge of the platform and the inner edge of the corresponding opening. The platform has the general shape of a parallelogram, a bisector of which corresponds approximately to the main axis of the profile of the vane at the platform.

Abstract: This invention relates to a flap valve with a shutter and a pneumatic actuator that is integrated into the valve, said actuator comprising a metal bellow interdependent with the shutter, wherein said bellow is directly welded onto an intermediate flange downstream from the valve and directly onto the shutter at the level of an end part upstream from the valve. The invention also relates to the use of such a valve as an isolating stop valve in the aerospace sector, preferably at high or cryogenic temperatures.