Sealing Linear Bearing

[Helepolis]

Hello all,

I'm looking for a possible solution for the following setup:
A container (with atmospheric pressure) has an SS316 rod going through its lid for linear actuation (of an internal component), the inside of the container has to be sealed for the outside environment meaning that the hole through which the rod goes through has to be sealed against the rod.
[ul]
[li]The seal material has to withstand high heat and steam environments (+120C)[/li]
[li]Low friction coefficient (for manual actuation if needed)[/li]
[/ul]

So far i have found only one possible solution at LM76.

can someone recommend other possible solutions and/or products.

Thanks,
SD

 

[MikeHalloran]

For manual actuation, I suggest a double-ended rod with two seals, so the actuation is pressure-balanced.
OR
the actuation is rotary and has discrete thrust bearings.

ALSO NOTE:
The traditional way to make seals and stuffing boxes durable is to put them at the distal ends of otherwise blind tubes, so that they are cooled by the outside ambient environment, and the actual seal material never deals with the actual process fluid at its circulating temperature. sort of like the way that valves for extreme temperatures are offered with, and usually ordered with, very long stems.



Mike Halloran
Corinth, NY, USA