Throttle device

A throttle device for a fluid collector of a steam generator for varying the pressure of a fluid in a plurality of parallel outlets, the throttle device comprising:

• a fluid collector having an inlet and a plurality of outlets for the fluid, a control element that is at least partially displaceably mounted in the internal chamber of said fluid collector and comprises a plurality of orifices wherein said orifices and said outlets on said fluid collector are configured and positioned in said control element such that the cross-section of a plurality of fluid communication routes between said internal chamber of said fluid collector and a plurality of outlets on said fluid collector can be varied by means of a relative movement of said control element in relation to said fluid collector, wherein said control element is a sleeve and said orifices are disposed in said sleeve such that the orifices correspond to said outlets of said fluid collector, and wherein between said sleeve and said fluid collector seals are provided such that in a region between of an outside surface of said sleeve and an inside surface surrounding said internal chamber of said fluid collector no fluid communication takes place between said orifices in said sleeve, wherein said seals project from said outside surface of said sleeve or said surface surrounding said internal chamber of said fluid collector and are in each case in plane contact with the corresponding opposing surface of said fluid collector or of said sleeve.