Gas supply apparatus

A gas supply apparatus comprising:

• a shaft, which is rotatably mounted about a rotational axis;
• a temperature-controlling device including a medium temperature control surrounding the shaft and combined with a gas temperature control;
• and
• a housing, wherein the housing is configured to surround the shaft and the temperature-controlling device wherein the temperature-controlling device comprises:
• a temperature-controlling sleeve with a first temperature-controlling guide geometry, which opens radially outward and is configured for guiding a flow of a temperature-controlling medium, and, for temperature-controlling gas,
• a gas temperature-controlling ring, which includes a second temperature-controlling guide geometry that opens radially outward, said gas temperature-controlling ring delimiting the first temperature-controlling guide geometry inwardly and/or axially and being delimited radially outwardly by a housing body, wherein
• the gas temperature-controlling ring comprises a sleeve-like base body, which is combined with a structural sheet metal that serves as a second radially-outwardly opening temperature-controlling guide geometry, and
• the housing radially outwardly delimits the second temperature-controlling guide geometry of the gas temperature-controlling ring and at least partially delimits the first temperature-controlling guide geometry of the temperature-controlling sleeve.