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  • #16
    Re: Loud whine whilst using machine

    - As I see and according to speleomike bezzera advice post, its not necesary to adjust the OPV to 9bar? (to make superb shots I mean)

    - When most galatea users said that galatea is noisy, they refers to that "whining noise"? Or without that whining noise, Galatea remains noisy compared with other machines?

    The noise issue is very important for me... I do not want to annoy my friends everytime I make for them some coffees.

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    • #17
      Re: Loud whine whilst using machine

      Originally posted by oton link=1217904925/0#15 date=1226659055
      - As I see and according to speleomike bezzera advice post, its not necesary to adjust the OPV to 9bar? (to make superb shots I mean)

      - When most galatea users said that galatea is noisy, they refers to that "whining noise"? Or without that whining noise, Galatea remains noisy compared with other machines?

      The noise issue is very important for me... I do not want to annoy my friends everytime I make for them some coffees.
      Hola Oton

      If you don’t adjust the OPV on the Galatea you get normal noise

      That said it is normal for any espresso machine fitted with a vibe pump to have some noise
      It is the vibe pump makes 90% of the noise

      If you have a rotary pump model (plumbed in) the noise is reduced by over half or more

      Back up on speleomikes post reply #12
      That explanation was written by Jack the service technician at Barazi the Bezzera importer to Australia
      So he knows what he is talking about

      KK

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      • #18
        Re: Loud whine whilst using machine

        Originally posted by Koffee Kosmo link=1217904925/0#16 date=1226663189
        Hola Oton

        If you don’t adjust the OPV on the Galatea you get normal noise

        That said it is normal for any espresso machine fitted with a vibe pump to have some noise
        It is the vibe pump makes 90% of the noise

        If you have a rotary pump model (plumbed in) the noise is reduced by over half or more

        Back up on speleomikes post reply #12
        That explanation was written by Jack the service technician at Barazi the Bezzera importer to Australia
        So he knows what he is talking about

        KK
        A DG at 12 bar pushes through the end of the shot and you get a 12 bar espresso. At 9 bar, it doesnt and you get a 9 bar espresso. Both are good, but Ill take the squealer thanks. Its better...

        As I understand, 12 bar was used so that the return from the opv to the drip tray would be minimised. Now that the return is back to the tank, there is no reason (other than the OPV design) that the more optimum 9 bar cant occur.

        Its not a deal breaker but Id personally put up with a little opv squeal....

        2mcm

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        • #19
          Re: Loud whine whilst using machine

          This is very good reading
          All about OPV
          It is a fantastic read


          http://coffeetime.wdfiles.com/local--files/opv-over-pressure-valve/OPV_Valve.pdf

          KK

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          • #20
            Re: Loud whine whilst using machine

            Im thinking of adjusting my Galatea OPV this weekend. Although Jack at Barazi has told me the OPV does not need to be changed from factory settings. Oh well, I can always change it back! The loud noise shouldnt bother me. Anyone got any tips on adjusting the OPV for this machine?

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            • #21
              Re: Loud whine whilst using machine

              Originally posted by markfroble link=1217904925/0#19 date=1226730717
              Anyone got any tips on adjusting the OPV for this machine?
              Yes, I have a few.

              1. Take Jacks advice
              2. If you need to ask for tips on how to adjust it, you should go back to point 1
              3. If its under warranty, youll void it
              4. If you insist on doing it despite the above, start by unplugging the machine

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              • #22
                Re: Loud whine whilst using machine

                Originally posted by markfroble link=1217904925/0#19 date=1226730717
                Im thinking of adjusting my Galatea OPV this weekend.  Although Jack at Barazi has told me the OPV does not need to be changed from factory settings.  Oh well, I can always change it back!  The loud noise shouldnt bother me.  Anyone got any tips on adjusting the OPV for this machine?
                Yes Mark,

                If it needs to be done at all, at the very minimum youd need a portafilter pressure gauge to do it...

                As previously mentioned, being a three-handed, rubber man with child size hands would also be a massive bonus.

                Without the right gear for the job, best to leave it alone....

                Keep in mind that as Dennis mentioned, you may well void your warranty as well.

                Chris

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                • #23
                  Re: Loud whine whilst using machine

                  Well Im not interested in voiding the warranty. Think Ill leave it alone for a while. Ive been happy with the results at standard settings so far. Thanks for your help.

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                  • #24
                    Re: Loud whine whilst using machine

                    Glad to hear that Mark, and hope you didnt find my comments impolite. I should have prefaced my remarks by suggesting that if youre producing reasonable shots now, and theres nothing actually wrong with the machine, then tinkering with your grind and technique are far more likely to make a greater contribution to achieving coffee nirvana.

                    Cheers!

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