Connect ceramic to flexible tube

[Nanimo]

Hello,

I need to connect ceramic (aluminium oxide) tubes to a flexible tube (right now I have PTFE and PFA, but I'm open to other suggestions). The method I use currently is to fit the ceramic tubes in the flexible tube (the ID of the flexible tube is slightly smaller than the OD of the ceramic tube) and use some kind of adhesive in addition. This method is working, but I'm looking for something more reliable as it seems non-professional.

Some additional info:
- To give you an idea of the dimensions the ceramic tube I have right now are OD of 1.6mm and ID of 0.79mm.
- Pressure is around 5 bar but most of the time the system it is not pressurized (it's pressurized for max 1min)
- I'm open to any suggestion of "bendable" tube, but it needs to be able to go to "high temperature" (as high as I can get, I don't really have a number as the rest is designed around that).
- That high temperature is never encountered more than 10s, the rest of the time it's at ambient temperature.

Any suggestions are welcome

Thanks

 

[moltenmetal]

Gluing PFA or PTFE to anything else is tough. Good luck-

 

[StoneCold]

It seems to me that your ceramic part should have a hose barb connection on it to connect it to the rest of the system.
Regards
StoneCold

 

[chicopee]

I don't know if you can shrink fit PTFE or PFA over the ceramic tubes?

 

[Nanimo]

Stonecold:
Due to the diameter of those tube, and the fact that they are made of Alumina, machining a barbed-like connection on it wont be possible (well it might but it's going to be a costy job I guess).


chicopee:
That's what I tried and it seems to work! I'm having pressures low enough for that to work correctly, but I'm going to use some safety wire in addition to that "just to be sure".

I'm still open to suggestion though.

 

[Latexman]

If the PTFE or PFA can go over the ceramic tubes, use a standard hose clamp (worm gear screw type).

Good luck,
Latexman

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