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.
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?