Vacuum valves with inbuilt overpressure release


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This topic contains 5 replies, has 4 voices, and was last updated by Alex Holmes Alex Holmes 3 months, 3 weeks ago.

Viewing 6 posts - 1 through 6 (of 6 total)
  • Author
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  • #6113
    Alex Holmes
    Alex Holmes
    Participant

    The attached photo shows a valve on the OVC of an orange cryostat, which I believe has a built-in overpressure release vent (the coloured disc). I’d like to get hold of one with standard KF connections. Despite extensive googling I have been unable to find who sells them or even if that is a real thing. Can anyone help? I am pretty sure I have seen something similar elsewhere too, so I think they do exist.

    Wishing everyone a very merry christmas and a happy new year.

    Alex

    #6114
    Yegor Vekhov
    Yegor Vekhov
    Participant

    Alex, I do not see any picture attached to your post but anyway I would ask folks from A.S. Scientific because they do assemble ILL orange cryostats for many facilities.
    Best,
    Yegor

    #6115
    Simon Baudoin
    Simon Baudoin
    Participant

    Alex, if I well understand the valve you talk about, this vacuum valves are manufactured by Oxford instruments.
    https://www.cryospares.de/mobile/Category.aspx?id=1881
    Regards
    Simon

    #6116
    Norman Booth
    Norman Booth
    Participant

    Hi Alex,
    Further to Simon’s post only this one https://www.cryospares.co.uk/Vacuum-valve-p/a3-103.htm has the overpressure valve. A3-104 doesn’t.

    cheers
    Norm

    #6117
    Alex Holmes
    Alex Holmes
    Participant

    Thanks, very much. It looks like the picture didn’t attach, but that is exactly what I was talking about. It looks like you need to weld on your own KF fittings to those valves. Is Oxford the only supplier that makes these?

    #6574
    Alex Holmes
    Alex Holmes
    Participant

    As an update to this, Oxford Cryospares do a similar valve with KF25 fittings and a 0.1 bar overpressure release. It doesn’t seem to be on their web catalogue but you can order it by contacting them directly.

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