High-temperature high-pressure gas processing apparatus

A high-temperature high-pressure gas processing apparatus for processing a workpiece to be processed by heating in a high-pressure gas atmosphere in a high-pressure vessel having a heater, comprising:

• the high-pressure vessel divided into at least two vessel component members in an axial direction thereof, at least one of which has cooling means;
• a frame for holding a load acting in the axial direction of the high-pressure vessel in processing the workpiece in the high-pressure vessel;
• an actuator for moving the vessel component members of the high-pressure vessel in the axial direction thereof so as to loading or unloading the workpiece;
• sealing means fitted to a portion for loading and unloading the workpiece, which is formed when the vessel component members are moved in the axial direction of the high-pressure vessel, said sealing means including a retainer ring forming a sealing surface and having a first axial seal at the sealing surface and a second radial seal;
• and
• a retractable cotter member for transmitting the load acting in the axial direction of the high-pressure vessel to the frame.