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Thread: Greg Pullman's portafilter pressure gauge on the road

  1. #51
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    Received gauge today. I'll test it on the weekend.

  2. #52
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    Last night I tested my Vibiemme Domobar Junior with the gauge and found that it was a fraction over 9 bars. Only a minor adjustment was required. Today I poured one espresso and could not discern any difference in the taste or pour.

    Does anyone else want to use the gauge?

  3. #53
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    Yes, I would like to use the gauge, but I'll be away from May 9 to May 16. Should I wait until I get back before sending the request? It's not at all urgent, anyway.

  4. #54
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    Hi guys,

    The gauge is at the end of its travels. If anyone else wants it at the discounted price follow the instructions in the first post and you'll get it with minimal delay, otherwise it'll come back to me for a spit and polish until it's required again.

    Greg

  5. #55
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    Email sent. Cheers Greg.

  6. #56
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    Fee transferred. Please add me to the queue

  7. #57
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    Money transferred, please add me to the list.

    Cheers
    Peter

  8. #58
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    Got the gauge yesterday. Hopefully will put it to use over the weekend.

  9. #59
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    Just reporting that I received the gauge, and have used it to fix the pressure on the Silvia. Does anyone else want it, before I send it back to Greg?

    A couple of comments re my experience with the gauge.

    I have a Silvia V1 from about 2002, and I was dismayed to discover when I hooked up the gauge that the portafilter has a notch in it. Hence no pressure to the gauge. Had me stumped for a while trying to find a way to seal it, then discovered that 2 wide rubber bands of the appropriate size wrapped around the basket under the rim did a perfect job of sealing it.

    On testing the pressure, I found that it was set to 12 bar as apparently most of the early machines were. This surprised me as well, as I had done the 'check pressure by bleeding water out the overflow pipe using the blind filter test' some years ago, and had determined (supposedly) that the pressure was correct at 9 bar. So either I stuffed up the test, or it is not very accurate.

    Anyway, I had one of the teflon gaskets from coffeeparts, put that in, and after tightening the OPV as hard as possible, got the pressure to exactly 9 bar.

    Well, now I feel like a complete idiot for not doing this years ago. The difference is remarkable. Oh well, better late than never I guess.

    Cheers
    Peter

  10. #60
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    Quote Originally Posted by PeterT View Post
    On testing the pressure, I found that it was set to 12 bar as apparently most of the early machines were. This surprised me as well, as I had done the 'check pressure by bleeding water out the overflow pipe using the blind filter test' some years ago, and had determined (supposedly) that the pressure was correct at 9 bar. So either I stuffed up the test, or it is not very accurate.
    G'day Peter...

    Great result mate and it is really noticeable, as you say, to pull shots at the correct Brew Pressure. The alternative method you used is really only a ballpark 'stop-gap' measure until a proper pressure setup can be performed. Quick and dirty is the term used I believe...

    Mal.

  11. #61
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    Hi Peter,

    So true. The very first post I wrote about this when first advertising the gauge (long since deleted, it was under the Pullman sponsor section) discussed the inaccuracy of that method, which Mal has well described. Others have written similar things so I'm sure no IP is lost to mankind! It's good enough as a starting point to make sure you're not a 2 or 20 bar, but not accurate enough for most of us here. The gauge is well served for this purpose.

    Greg
    Last edited by gregpullman; 18th June 2014 at 04:22 PM.
    Dimal likes this.

  12. #62
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    As PeterT says the gauge has finished its travels, if you want to use it at the discounted rate please follow the instructions. PeterT if there are no takers by the end of next week (Friday 27 June) please email me to arrange its return.

    Cheers,
    Greg

  13. #63
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    Hi Greg and PeterT

    paid up and ready to go. Please add me to the list

    Sam

  14. #64
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    Received - thanks Greg and PeterT.
    somewhat disappointingly revealed my V3 silvia is bang on 9bar!
    any other takers?

  15. #65
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    I'm keen but waiting on my e-mail back from Greg's address.

  16. #66
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    Hi mgrobins, I've emailed you to follow up on this, let me know how you go. surgeonsam please stand by.

  17. #67
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    Quote Originally Posted by gregpullman View Post
    Hi mgrobins, I've emailed you to follow up on this, let me know how you go. surgeonsam please stand by.
    Thanks for the e-mail Greg. I have deposited the funds.

  18. #68
    Junior Member mcetp001's Avatar
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    I wish I knew about this before I bodged up a pressure gauge using a piece of flexible hose and a couple of hose clamps to connect he gauge to the portafilter spout...it was kind of successful...

  19. #69
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    My giotto was sitting at 950 so I dropped it down a bit to 900 and am yet to test it. It's still apart so I can add some spare dynamat to the side panels .

    Who is next for this? Greg is it coming back to you?

  20. #70
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    Surgeonsam has indicated he's sending it to you. I've just followed up with him but you may like to touch base with him if he hasn't been in touch with you already to see where it's up to.

  21. #71
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    Hi Greg, just pm'ed you
    sam

  22. #72
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    Sorry my bad. mgrobins hold onto it for now, --- is interested but waiting confirmation and payment, if that comes through it can go to him, otherwise I'll get it back. Thanks.
    Last edited by gregpullman; 1st August 2014 at 11:25 AM. Reason: updated info

  23. #73
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    No-one else needs it now so last call for this round before it comes back to me.

  24. #74
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    Seems 50kPa made a fair difference in temps as my coffee tastes less acidic and the water isn't boiling off after the machine has been sitting a while and I pull the lever.

    The boiler gauge on my giotto says 1bar now down from 1.2. At 1.2 bar the group head gauge reads at 950kPa.

  25. #75
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    950kPa is 9.5 bar. This is pump pressure. Boiler gauge reflects boiler temperature and nothing else.

  26. #76
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    Yes I know the Giotto's gauge reflects that. Lower pressure stat setting = Lower boiler temp = lower Hx water temp (and thus lower brew temp) Correct?

    I was merely highlighting the relative change in the markers that I have available to monitor change - those being the boiler gauge and the group head gauge I loaned from Greg.

  27. #77
    Senior Member magnafunk's Avatar
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    Just paid up and would like to hop on the queue,
    Cheers

  28. #78
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    I have it waiting to go once I get the word from Greg that payment has arrived. PM me your address too .

  29. #79
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    Have paid Greg, please add me to the queue. Thanks!!

  30. #80
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    Well after a few hours messing around with my Gaggia TS, I have it at just over 9 bar and the shots are cracking. Something that had me vexed for a while was, I would switch the machine off at the wall, adjust the OPV and then switch on, replace the warm water in the PF and retest. I could only seem to get 2 bar or 12 and never anything in between. I realised that because you have to remove a hose to adjust the OPV on my machine, that it requires a long flush with no PF attached before reattaching the gauge and taking your measurements. Once I had this figured out, it took me 3 goes to get it spot on.

    So, now my Gaggia which I am selling is at perfect pressure but unfortunately, my Cimbali which I am keeping has no thread on it's portafilter so no way to attach the gauge :-( I am ready to pass it on to saywhat as soon as Greg gives me the go ahead.

  31. #81
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    Yep all paid up thanks Magnafunk, send it on!

  32. #82
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    Hi guys, saywhat will have the gauge for a little while longer but there's no-one after him so there should only be a short wait if you want to use it. Follow the instructions in the first post to get in line.

    Greg

  33. #83
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    Hi guys,

    The gauge has reached the end of its travels so this is the last call for anyone who wants to check the pressure of their machine at the reduced CS bulk rate of $15. If you want to grab it at immediate notice follow the instructions in the first post. If no-one's posted here by the end of September it'll come back to me.

    Cheers,
    Greg

  34. #84
    Senior Member Lukemc's Avatar
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    Hi Greg and saywhat i put my payment through this afternoon

  35. #85
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    Paid up, please send onward when ready.

  36. #86
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    Hi luke! Could you PM me your address?

  37. #87
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    Money transferred, please add me to the list.

  38. #88
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    Pressure gauge posted to lukemc.

  39. #89
    Senior Member Lukemc's Avatar
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    Hey mate, waiting for a pm with your address

    Quote Originally Posted by MrMcSteam View Post
    Paid up, please send onward when ready.

  40. #90
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    Quote Originally Posted by JimmyF View Post
    Money transferred, please add me to the list.
    Hi Jimmy please PM me your address and I'll send the gauge Monday/Tuesday.

  41. #91
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    Hi guys,

    The gauge is again at the end of its travels. Please advise in the next few days if you'd like to use it to get your Christmas coffees at their best , otherwise it'll come back for a service until it's needed again.

    Cheers,

  42. #92
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    All paid up, please add me to the list.

  43. #93
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    Is the gauge still traveling? Might be interested. Saves me making my own.

  44. #94
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    Yep it's still on the road, I believe it's on its way to GoatWhisperer. Follow the instructions in the first post of this thread to book your place in the queue.

    Cheers,
    Greg

  45. #95
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    Arrived today so will get to testing either tonight or tomorrow.

  46. #96
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    Does anyone else want to use this at the discounted rate before it comes back to me? If so please follow the instructions in the first post to book your place in the queue.

    Greg

  47. #97
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    Yep will get onto it in the next couple of days!

  48. #98
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    Paid, the gauge will stay in tas for a little longer!

  49. #99
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    Does anyone else want to use the gauge once hallph has finished with it? If so please follow the instructions in the first post.

    Greg

  50. #100
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    Behmor Brazen - $249 - Free Freight
    Just paid Greg, please add me to the list. (And thank you!!!)

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