The axial blade (6) ends (28) are held by positioning bolts (11) pivotably in the stator part (8) of the turbine (2). A sealing component (10) is incorporated in a pressure chamber (19) in the stator part and is pneumatically activatable, being pressable with a face side (15) in a sealed manner on the free blade ends. Per guide blade (6) a sealing component is provided in a pressure chamber (19). The pressure chamber of each sealing component is connected in a communicating manner via a pressure conduit (20) with the turbine inlet upstream of the guide grid (5).
