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Sorry for this very technical question, but we suffer from this problem at work and I do not know any other place to ask.

Its about a good and cheap way of connecting a glass tube with a metal tube in a vacuum setup. There are some solutions with gradually changing glass-materials in order to minimize the tension caused by the different heating-extensions of metal and glass. However they are rather expensive and we would prefer a cheap solution.

We found a promising image of possible connection, however there was no manufacturer and no name of the flange given. enter image description here

So does anyone of you recognize this type of flange? Or does anyone know where to ask such a question? What would you suggest as a connection between metal and glass in a vacuum setup?

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closed as off topic by David Z Oct 18 '11 at 17:48

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This is a very good candidate for the Experimental Physics proposal if it ever gets off the ground. –  dmckee Oct 18 '11 at 15:46
    
@dmckee, What would stay with the physics.se then? –  Georg Oct 18 '11 at 16:50
    
In the picture You liked here, there are in fact 4 different connectors for tubes. Which is the one You are interested in? –  Georg Oct 18 '11 at 16:51
    
thanks for your comments. I am interested in the connector in the middle of the picture. That one with the black O-ring in it. This connector would be screwed to the left end of the tube-part shown directly above. How is this system called? I would very much appreciate hints :-) –  ftiaronsem Oct 18 '11 at 21:31

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