Understanding How Seals Work on Autoclaves

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The discussion focuses on the sealing mechanism of autoclaves, particularly the role of the rotatable bayonet ring and the O-ring face seal. It questions whether the wedging action of the bayonet ring generates the necessary sealing force and how the ring is secured while allowing rotation under high pressure. The conversation also touches on the thermal insulation provided by concentric rings around the O-ring seal. Additionally, participants seek recommendations for suitable lubricants for EPDM autoclave seals. Understanding these components is crucial for ensuring the effective operation of high-pressure vessels like autoclaves.
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How does the seal work on a large resealable high pressure vessel such as an autoclave?
example: http://gust.engin.umich.edu/autoclave2.jpg

If you look at the example above you always see the rotatable bayonet ring attached to the vessel. The red ring is probably the o-ring face seal on the chamber. The concentric rings on the end I assume are for thermal insulation of the red o-ring seal on the vessel.

Is it the wedging of the bayonet ring that provides the normal sealing force or is there something that I'm missing? And how is that ring secured to the vessel itself while being rotatable and stiff enough to support all the pressure on the flange while in operation? Or is the flange the rotatable part (that would make more sense)?
 
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On this subject can anyone help with a good lubricant for EPDM autoclave seals ?
 
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