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Bezzera BZ10 high pitch noise

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  • dbun
    replied
    Yes, agree with Mal above - I have a BZ10 too and can introduce more or less of the whine depending on how the OPV is adjusted.
    Nothing wrong with the machine.

    Out of interest, what pressure is the gauge sitting at when you backflush with a blind disk?

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  • Ibettio
    replied
    Super helpful thanks Mal!

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  • Dimal
    replied
    G'day Ibettio...

    More than likely, it is just a bit of harmonic resonance happening between the pump and the OPV.
    If you find it annoying, you could adjust the pressure down very lightly on the OPV which might move the natural frequency of the OPV Spring away from the 50Hz pressure pulses of the pump.

    Mal.

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  • Ibettio
    started a topic Bezzera BZ10 high pitch noise

    Bezzera BZ10 high pitch noise

    Hi all! We purchased a Bezzera BZ10 a couple months ago.. loving the coffee it’s an amazing machine but noticed in the last couple of days it making a high pitch noise when pulling the shots. Still getting up to pressure as normal and quality is still there but not sure what could be causing this new sound? Contacted the supplier but waiting to hear back, not sure if anyone has had the same experience or knows what could be causing it? Thanks all
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