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rotating rod in pressure vessel

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biff44

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pressure vessel

I have a large steel pressure vessel at 100 PSIG with gases inside. Gas temeprature might be 600 degrees F.

I need to pass a long rotating ceramic rod, perhaps 1/2 inch diameter, through the side wall of the vessel. I am looking for a rotating bearing that can hold the rod at the vessel wall, allow it to rotate, but be gas-tight. Rotation rate will be around 10 RPM.

Any suggestions?

Thanks for the help.

Rich
 

FvM

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pressure rotating pass through

Various shaft seals are commercially available, also some with extended temperature range. You should know the actual vessel wall temperature and also a specification for permissible leak rate. (A seal for motion transfer can't have zero leak rate, unless it's a true hermetic magnetic coupling).
 

dick_freebird

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What about a magnetic drive, like March (and some other)
pumps use? Totally sealless. You would need a non-magnetic
vessel most likely, or a nonmagnetic insert.

Chemistry lab hot plates with magnetic stirrers are common,
the stirrer is steel in a poly or Teflon jacket. Maybe not
600F capable, but perhaps. I bet a ferrite bar would spin
too, if oriented and below Curie temp.
 

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