Steam turbine, having a steam turbine outer housing, a high-pressure inner housing with a first process steam inlet section and with a first process steam outlet section for conducting process steam through the high-pressure inner housing from the first process steam inlet section to the first process steam outlet section in a first process steam expansion direction, a low-pressure inner housing with a second process steam inlet section and with a second process steam outlet section for conducting process steam through the low-pressure inner housing from the second process steam inlet section to the second process steam outlet section in a second process steam expansion direction, and an intermediate superheater for intermediate superheating of process steam which can be extracted downstream of the high-pressure inner housing and upstream of the low-pressure inner housing, wherein - the high-pressure inner housing and the low-pressure inner housing are arranged within the steam turbine outer housing, - the high-pressure inner housing and the low-pressure inner housing are arranged such that the first steam inlet section of the high-pressure inner housing faces toward the second steam inlet section of the low-pressure inner housing, characterized in that - downstream of the high-pressure inner housing, there is formed a process steam diverting section for diverting process steam from the first steam outlet section in a direction counter to the first steam expansion direction into a gap which extends between an inner wall of the steam turbine outer housing and an outer wall of the high-pressure inner housing and at least in certain sections between the inner wall of the steam turbine outer housing and an outer wall of the low-pressure inner housing, - at an upstream end section of the high-pressure inner housing, at which the first process steam inlet section is formed, there is arranged a high-pressure sealing shell for at least partially sealing off the upstream end section of the high-pressure inner housing, and, at an upstream end section of the low-pressure inner housing, at which the second process steam inlet section is formed, there is arranged a low-pressure sealing shell for at least partially sealing off the upstream end section of the low-pressure inner housing, and wherein the high-pressure sealing shell and the low-pressure sealing shell are arranged adjacent to one another, wherein the high-pressure inner housing is designed such that process steam can be extracted from the high-pressure inner housing and conducted into a region between the high-pressure sealing shell and the low-pressure sealing shell. - the high-pressure inner housing and the low-pressure inner housing are arranged within the steam turbine outer housing, - the high-pressure inner housing and the low-pressure inner housing are arranged such that the first steam inlet section of the high-pressure inner housing faces toward the second steam inlet section of the low-pressure inner housing, characterized in that - downstream of the high-pressure inner housing, there is formed a process steam diverting section for diverting process steam from the first steam outlet section in a direction counter to the first steam expansion direction into a gap which extends between an inner wall of the steam turbine outer housing and an outer wall of the high-pressure inner housing and at least in certain sections between the inner wall of the steam turbine outer housing and an outer wall of the low-pressure inner housing, - at an upstream end section of the high-pressure inner housing, at which the first process steam inlet section is formed, there is arranged a high-pressure sealing shell for at least partially sealing off the upstream end section of the high-pressure inner housing, and, at an upstream end section of the low-pressure inner housing, at which the second process steam inlet section is formed, there is arranged a low-pressure sealing shell for at least partially sealing off the upstream end section of the low-pressure inner housing, and wherein the high-pressure sealing shell and the low-pressure sealing shell are arranged adjacent to one another,