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. http://b1online.de/public/vacuum.jpg
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?