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
 

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).
 

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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