Page 1 of 7 123 ... LastLast
Results 1 to 50 of 343
Like Tree1Likes

Thread: Greg Pullmans Pressure gauge on the road

  1. #1
    TC
    TC is offline
    .
    Join Date
    Oct 2004
    Location
    Melbourne
    Posts
    14,665

    Greg Pullmans Pressure gauge on the road

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    New thread started here with updated details. To avoid confusion this thread has been locked.

    Hi guys,

    I thought that this thread was better placed in the general coffee related area.For some reason, it disappeared on the move. Posts are below. Fortunately I still had a separate window open.

    2mcm


    *
    telemaster
    OlSmokey

    Online


    one of the joys of life
    is good coffee
    Posts: 579

    Greg Pullmans pressure gauge for hire- anyone interested?
    Sep 8th, 2009, 6:44am * * Im hiring Gregs gauge which attaches to a filter handle. The deal is that an individual pays Greg $20 and he posts it to you and then you post it back.
    Alternatively, if a few of us do it, he posts it to the first person for $15, who posts it to you (youve paid Greg $15), you post it to the next person whos also paid their $15 and the last person posts it onto Greg.
    Anyone interested?
    Brett
    Back to top *


    *
    Nico
    GreenBean

    Offline


    CoffeeSnob
    Posts: 37
    Sydney, NSW
    Gender:
    Re: Greg Pullmans pressure gauge for hire- anyone interested?
    Reply #1 - Sep 8th, 2009, 7:10am I am in. I definately need to adjust the OPV on the Pavoni. Let me know when you are ready to mail it off, and I will PM you my address.

    I am in North Ryde, 2113, btw.
    Back to top *
    La Pavoni Pub Single group || Cunill El Tranquilo * * IP Logged

    *
    Pullman Espresso Accessories
    Site Sponsor

    Offline


    Tamper Craftsmen, Roaster
    Purists
    Posts: 840
    Perth / Adelaide
    Re: Greg Pullmans pressure gauge for hire- anyone interested?
    Reply #2 - Sep 8th, 2009, 9:24am Hi guys,

    Nice to see some takers on this. The original post is under our sponsor area http://coffeesnobs.com.au/YaBB.pl?num=1163933751 which contains the rules and conditions so Id encourage you to familiarise yourselves with that. After that its basically as telemaster has said - express your interest in a thread such as this one, contact me to arrange payment and then just wait for it to arrive!

    Greg



    Back to top *
    Premium Designer Stainless Steel / Hardwood Coffee Tampers
    http://www.coffeetamper.com.au

    Hottop and Gene Cafe Coffee Roasters
    http://www.thingscoffee.com.au IP Logged

    *
    bjeck14
    Roastalot

    Offline


    CoffeeSnob
    Posts: 287
    Sydney
    Gender:
    Re: Greg Pullmans pressure gauge for hire- anyone interested?
    Reply #3 - Sep 8th, 2009, 10:58am Im definitely interested. Im hoping to have my machine up and running in about a week so any time after then is perfect.

    Im in Randwick 2031.

    Cheers,
    Ben
    Back to top *
    ||| Gaggia Classic (with silvia steam wand) | Mazzer Mini Manual | Bumper Tamper | Brasilia Portofino 2grp (in progress) ||| Coretto Roaster ||| * * IP Logged

    *
    muppet_man67
    OlSmokey

    Online


    CoffeeSnob
    Posts: 545

    Re: Greg Pullmans pressure gauge for hire- anyone interested?
    Reply #4 - Sep 8th, 2009, 11:02am Im also interested, Ive never checked my silvia opv
    Back to top IP Logged

    *
    Greg Pullman
    OlSmokey

    Offline


    Tamper craftsman
    Posts: 1791
    Adelaide
    Gender:
    Re: Greg Pullmans pressure gauge for hire- anyone interested?
    Reply #5 - Sep 8th, 2009, 1:24pm OK great guys. Email me to sort out the payment side of things *greg[at]coffeetamperDOTcomDOTau and Ill get the gauge off to telemaster who will forward it on to the next person. Presuming the expressions of interest above are confirmed, itll go to Telemaster, Nico, bjeck14 and muppet_man67 and then to anyone else who wants to get on the end of the queue and then to anyone else in order of payment received.

    With all due respect to music snobs, the 12 bar blues has no place round here! *

    Greg
    Back to top ę Last Edit: Sep 9th, 2009, 9:11am by Greg Pullman Ľ *
    Silvia + Watlow SD3C PID | Presso | Mazzer Super Jolly + Mini | Hottop B/P + Gene Cafe | tampers
    Premium hardwood / stainless steel coffee tampers
    http://www.coffeetamper.com.au IP Logged

    *
    Greg Pullman
    OlSmokey

    Offline


    Tamper craftsman
    Posts: 1791
    Adelaide
    Gender:
    Re: Greg Pullmans pressure gauge for hire- anyone interested?
    Reply #6 - Sep 17th, 2009, 12:08pm The gauge is now with Telemaster and I expect itll be on the road for the next few weeks, so if anyone else wants to get in on this please express your interest sooner rather than later so youre in line before it finishes its scheduled travels.

    Greg
    Back to top *
    Silvia + Watlow SD3C PID | Presso | Mazzer Super Jolly + Mini | Hottop B/P + Gene Cafe | tampers
    Premium hardwood / stainless steel coffee tampers
    http://www.coffeetamper.com.au IP Logged

    *
    prc6of7
    GreenBean

    Offline


    CoffeeSnob
    Posts: 30
    Newcastle
    Re: Greg Pullmans pressure gauge for hire- anyone interested?
    Reply #7 - Sep 17th, 2009, 12:32pm Im in, email on its way.
    Back to top *
    Rancilio Silvia, Rocky Doserless, Corretto Roaster, a dog that looks at me funny... * *IP Logged

    *
    telemaster
    OlSmokey

    Online


    one of the joys of life
    is good coffee
    Posts: 579
    Winmalee Blue Mountains
    Gender:
    Re: Greg Pullmans pressure gauge for hire- anyone interested?
    Reply #8 - Sep 17th, 2009, 7:08pm Ive done some preliminary testing and seem to be sitting at a hair over 9.5 bars- not bad considering the valve screw was loose when I got the machine and guestimated it! Ill probably post it on to Nico Tuesday.

    Does 9.5 sound good do you think?

    PS I needed to use plumbers tape as well as the o ring as the kitchen was getting flooded with a fine but powerful spray!

    Brett
    Back to top *
    Faema 2 gp Due S, *ECM botticelli single boiler (Watlow 93 PID kit from www.pidkits.com), Greg Pullman tamper, Nuova Simonelli MDXA and Rocky grinders, Gene Cafe roaster * * IP Logged

    *
    Nico
    GreenBean

    Offline


    CoffeeSnob
    Posts: 37
    Sydney, NSW
    Gender:
    Re: Greg Pullmans pressure gauge for hire- anyone interested?
    Reply #9 - Sep 17th, 2009, 9:08pm Hi,

    I think bjeck14 needs to get it next, then me. Check with Greg.
    Back to top *
    La Pavoni Pub Single group || Cunill El Tranquilo * * IP Logged

    *
    bjeck14
    Roastalot

    Offline


    CoffeeSnob
    Posts: 287
    Sydney
    Gender:
    Re: Greg Pullmans pressure gauge for hire- anyone interested?
    Reply #10 - Yesterday at 9:08am Nico,
    Youre next mate. Im flat chat for the next couple of weeks so put myself down the order. I think Im somewhere around last.

    Any way, hope its useful for everyone!
    Cheers,
    Ben
    Back to top *
    ||| Gaggia Classic (with silvia steam wand) | Mazzer Mini Manual | Bumper Tamper | Brasilia Portofino 2grp (in progress) ||| Coretto Roaster ||| * * IP Logged

    *
    Greg Pullman
    OlSmokey

    Offline


    Tamper craftsman
    Posts: 1791
    Adelaide
    Gender:
    Re: Greg Pullmans pressure gauge for hire- anyone interested?
    Reply #11 - Yesterday at 9:40am telemaster wrote on Sep 17th, 2009, 7:08pm:
    Ive done some preliminary testing and seem to be sitting at a hair over 9.5 bars- not bad considering the valve screw was loose when I got the machine and guestimated it! Ill probably post it on to Nico Tuesday.

    Does 9.5 sound good do you think?

    PS I needed to use plumbers tape as well as the o ring as the kitchen was getting flooded with a fine but powerful spray!

    Brett


    The actual pressure is something you choose. Of course 9 bar is considered optimal but like flat vs convex tampers and how much tamp pressure to use, there may not be one absolute answer. The Coffee Barun set their Synesso for 8.75 bar for example. 9.5 is certainly in the right ball-park, if it was me Id set it at 9.0 but if youve got time itd be interesting to experiment with different pressures and how it affects taste to your palate.

    Good note about the plumbers tape on the thread too; feel free to add it it to the instructions sheet!

    Greg
    Back to top *
    Silvia + Watlow SD3C PID | Presso | Mazzer Super Jolly + Mini | Hottop B/P + Gene Cafe | tampers
    Premium hardwood / stainless steel coffee tampers
    http://www.coffeetamper.com.au IP Logged

    *
    Chris D
    GreenBean

    Offline


    CoffeeSnob
    Posts: 20
    Melbourne
    Gender:
    Re: Greg Pullmans pressure gauge for hire- anyone interested?
    Reply #12 - Yesterday at 11:20am Can you please add me to the list of people who need this contraption...

    Need to descale and do some general service work on the Grimac this weekend and a shot at finly tunning my machine to 9 bar will top off the service like no tomorrow.

    cheers

    Chris
    Back to top *
    Full Time Machines
    Grimac La Uno || Gino Rossi RR45

    Part Time Machines
    1. La Pavoni
    2. Gaggia Classic
    3. Atomic
    * *IP Logged

    *
    telemaster
    OlSmokey

    Online


    one of the joys of life
    is good coffee
    Posts: 579
    Winmalee Blue Mountains
    Gender:
    Re: Greg Pullmans pressure gauge for hire- anyone interested?
    Reply #13 - Yesterday at 12:34pm Greg Pullman wrote on Yesterday at 9:40am:
    telemaster wrote on Sep 17th, 2009, 7:08pm:
    Ive done some preliminary testing and seem to be sitting at a hair over 9.5 bars- not bad considering the valve screw was loose when I got the machine and guestimated it! Ill probably post it on to Nico Tuesday.

    Does 9.5 sound good do you think?

    PS I needed to use plumbers tape as well as the o ring as the kitchen was getting flooded with a fine but powerful spray!

    Brett


    The actual pressure is something you choose. Of course 9 bar is considered optimal but like flat vs convex tampers and how much tamp pressure to use, there may not be one absolute answer. The Coffee Barun set their Synesso for 8.75 bar for example. 9.5 is certainly in the right ball-park, if it was me Id set it at 9.0 but if youve got time itd be interesting to experiment with different pressures and how it affects taste to your palate.

    Good note about the plumbers tape on the thread too; feel free to add it it to the instructions sheet!

    Greg
    Last edited by Javaphile; 31st October 2013 at 11:25 PM. Reason: Add link to new thread

  2. #2
    TC
    TC is offline
    .
    Join Date
    Oct 2004
    Location
    Melbourne
    Posts
    14,665

    Re: Greg Pullmans Pressure gauge on the road

    Re: Greg Pullmans pressure gauge for hire- anyone interested?
    Reply #12 - Yesterday at 11:20am Can you please add me to the list of people who need this contraption...

    Need to descale and do some general service work on the Grimac this weekend and a shot at finly tunning my machine to 9 bar will top off the service like no tomorrow.

    cheers

    Chris
    Back to top
    Full Time Machines
    Grimac La Uno || Gino Rossi RR45

    Part Time Machines
    1. La Pavoni
    2. Gaggia Classic
    3. Atomic
    IP Logged


    telemaster
    OlSmokey

    Online


    one of the joys of life
    is good coffee
    Posts: 579
    Winmalee Blue Mountains
    Gender:
    Re: Greg Pullmans pressure gauge for hire- anyone interested?
    Reply #13 - Yesterday at 12:34pm Greg Pullman wrote on Yesterday at 9:40am:
    telemaster wrote on Sep 17th, 2009, 7:08pm:
    Ive done some preliminary testing and seem to be sitting at a hair over 9.5 bars- not bad considering the valve screw was loose when I got the machine and guestimated it! Ill probably post it on to Nico Tuesday.

    Does 9.5 sound good do you think?

    PS I needed to use plumbers tape as well as the o ring as the kitchen was getting flooded with a fine but powerful spray!

    Brett


    The actual pressure is something you choose. Of course 9 bar is considered optimal but like flat vs convex tampers and how much tamp pressure to use, there may not be one absolute answer. The Coffee Barun set their Synesso for 8.75 bar for example. 9.5 is certainly in the right ball-park, if it was me Id set it at 9.0 but if youve got time itd be interesting to experiment with different pressures and how it affects taste to your palate.

    Good note about the plumbers tape on the thread too; feel free to add it it to the instructions sheet!

    Greg

    Hi Greg and All
    I dialed it back to the 9 bar mark (just a fraction over 9 on the machines gauge too)- the lock nut was completely loose. There seems to be an increased sweetness. I just a had a double flat white pulled at 14 sec. Also cappuccino and espresso at 25 sec both very sweet and rich (possibly debatable as humidity has just increased). Either way, it is a good experiment and shows that fiddling with the pressure "blind" and relying on pour and taste can get you close!
    Now Ill check the Botticelli (single boiler w PID) and see how close I was with the usual method of volume of water through OPV in 60 sec, then pass gauge onto Nico early next week.


    Brett
    Back to top
    Faema 2 gp Due S, ECM botticelli single boiler (Watlow 93 PID kit from www.pidkits.com), Greg Pullman tamper, Nuova Simonelli MDXA and Rocky grinders, Gene Cafe roaster IP Logged


    Bill
    Roastalot

    Offline


    CoffeeSnob
    Posts: 418

    Re: Greg Pullmans pressure gauge for hire- anyone interested?
    Reply #14 - Yesterday at 11:56pm Can you add me to the list as well? Ive never got around to checking the pressure on my Faema and I suspect its set far too high.

    Email sent.
    Back to top
    Faema E98 Compact S1, Mazzer Mini E, Pullman Tamper, Modified B&D Popper

  3. #3
    Senior Member
    Join Date
    Jul 2007
    Posts
    539

    Re: Greg Pullmans Pressure gauge on the road

    Money has now been sent to you, Greg.

    regards,
    Bill

  4. #4
    Senior Member
    Join Date
    Mar 2005
    Posts
    2,165

    Re: Greg Pullmans Pressure gauge on the road

    Thanks Bill, all through. The order so far is:

    Telemaster
    Nico
    muppet_man67
    prc6of7
    bill
    ChrisD
    Bjeck14 will be in the mix somewhere but as he explained he prefers to wait a few weeks so will be around the bottom of the queue.

  5. #5
    Senior Member
    Join Date
    Jul 2006
    Posts
    604

    Re: Greg Pullmans Pressure gauge on the road

    Hi All - apologies for not sending the pressure gauge on (got it last Thurs) as Ive been laid up for 5 days with some kidney related thing. I post it to Nico ASAP
    Brett

  6. #6
    Senior Member
    Join Date
    Jul 2006
    Posts
    604

    Re: Greg Pullmans Pressure gauge on the road

    Update- when I tested the ECM Botticelli with the gauge, I found the trick of amount of water passing through the OPV over 60 sec may have some foibles. Using that method, I set the machine at what was supposed to be 9 bars- Gregs gauge tested it at 11.5 bars, now wound back to 9.
    BTW the gauge is on its way to Nico
    Brett

  7. #7
    Senior Member
    Join Date
    May 2009
    Posts
    174

    Re: Greg Pullmans Pressure gauge on the road

    The gauge arrived this morning, and I rigged it up earlier this evening. I had some issues at first, since the grouphandle has a little cutout at the top of the lip, and with the gauge on, all the water was streaming out the top. Same tape applied to the rim before fitting the basket, and I managed to get it going.

    Shocker!! The machine is pumping out just shy of 15 bar. It explains why I am still getting a relatively fast pour even on the finest grind setting. I reckon the grind I am using would choke the pav if I was getting 9 bar.

    I am looking forward to pouring some shots at the correct pressure, even though I am pretty happy with the taste in the cup at the moment.


  8. #8
    Senior Member
    Join Date
    Jul 2006
    Posts
    604

    Re: Greg Pullmans Pressure gauge on the road

    Interesting re change in pressure nico- the Botticelli was 2.5 bars too high and really only needed the tiniest grinder adjustment (the Rocky is now stepless and it only needed about 1mm twisted finer) when wound back to 9 bars.
    Brett

  9. #9
    Senior Member
    Join Date
    May 2009
    Posts
    174

    Re: Greg Pullmans Pressure gauge on the road

    I have not actually adjusted the opv yet. So the comment about the fastish pours on the finest grind apply to the current 15 bar pressure. I am only guessing that I will need a courser grind once its at 9 bar.

  10. #10
    Senior Member
    Join Date
    Jul 2006
    Posts
    604

    Re: Greg Pullmans Pressure gauge on the road

    Quote Originally Posted by 46414B47280 link=1253305789/8#8 date=1253827769
    I have not actually adjusted the opv yet. So the comment about the fastish pours on the finest grind apply to the current 15 bar pressure. I am only guessing that I will need a courser grind once its at 9 bar.
    Id reckon youre right. Id be guessing one click finer on the Cunill (an underrated grinder- just sold mine)

  11. #11
    Senior Member
    Join Date
    Jul 2007
    Posts
    539

    Re: Greg Pullmans Pressure gauge on the road

    Quote Originally Posted by 5A5D575B340 link=1253305789/6#6 date=1253794921
    Shocker!! The machine is pumping out just shy of 15 bar. It explains why I am still getting a relatively fast pour even on the finest grind setting. I reckon the grind I am using would choke the pav if I was getting 9 bar.
    Not necessarily. Higher pressure can often produce slower pours, contrary to common thinking. The higher brew pressure compacts the coffee more tightly, thereby creating a greater restriction to water flow.

  12. #12
    Senior Member
    Join Date
    May 2009
    Posts
    174

    Re: Greg Pullmans Pressure gauge on the road

    Hi guys.

    Sorry about hogging the gauge, but Ive had some gremlins. I will try to get it off to Muppet_Man over the weekend, and Monday at teh latest.

  13. #13
    Senior Member
    Join Date
    Jul 2006
    Posts
    604

    Re: Greg Pullmans Pressure gauge on the road

    Quote Originally Posted by 787F7579160 link=1253305789/11#11 date=1254443045
    Hi guys.

    Sorry about hogging the gauge, but Ive had some gremlins. I will try to get it off to Muppet_Man over the weekend, and Monday at teh latest.
    I suspect thatll be the case with most of us- life doesnt run smooth and nor do machine adjustments
    Brett

  14. #14
    Senior Member
    Join Date
    Mar 2005
    Posts
    2,165

    Re: Greg Pullmans Pressure gauge on the road

    Thats the purpose of getting the gauge and doing the adjustments - eradicating the gremlins! ;D

    Theres no particular limit to the time one person can have the gauge because as youve demonstrated you dont know quite what you may find when you come to measure things; the main thing is to get your adjustments done and the espresso flowing true! Im sure others in a combined hire arrangement such as this appreciate that, so as long as theyre kept in the loop and know its not just sitting idly in a drawer somewhere Im sure theyll be happy to bide their time.

    Thanks for the update Nico and good luck with the adjustments! [smiley=thumbsup.gif]
    Greg

  15. #15
    Member
    Join Date
    Mar 2009
    Posts
    57

    Re: Greg Pullmans Pressure gauge on the road

    Hi all,

    As i am expecting the gauge in the next few days, I have been reading what i need to do to adjust the OPV, and found the PDF instruction on how to do it all.

    After Reading these instruction and when i descaled my machine, i saw it had the white Nylon type OPV. The PDF say DO NOT ADJUST these.

    Firstly has anyone with this type of OPV actually adjusted it succesfully.

    If you cannot, where can i buy a new OPV?

    Thanks

    Chris

  16. #16
    Senior Member
    Join Date
    May 2009
    Posts
    174

    Re: Greg Pullmans Pressure gauge on the road

    Hi.
    Had the machine open, and the opv was the culprit. It leaks while not brewing, and I adjusted it back till the leaking stopped. Back to 15 bar.

    I replaced the jet in the brew head when I did the resto, and I swopped the old one back again, fwiw. Pressure is still up, but the coffe tastes amazing so I am leaving it the heck alone now.

    The gauge will head south in the morning.

  17. #17
    Senior Member
    Join Date
    Mar 2005
    Posts
    2,165

    Re: Greg Pullmans Pressure gauge on the road

    Without knowing the specifics of how its set up, it sounds to me like the OPV is functioning in reverse. It should be a closed circuit at low pressures and open once brew pressure is reached. Yours sounds to be the reverse and acting like an under-pressure valve. May be worth replacing it, or at least dismantling the OPV and compare it to an exploded view to see if its assembled correctly.

  18. #18
    Senior Member
    Join Date
    May 2009
    Posts
    174

    Re: Greg Pullmans Pressure gauge on the road

    This is the new, replaced one. The manual actually states it is not to be adjusted. I think a mod may be on the horizon.


  19. #19
    Senior Member
    Join Date
    May 2009
    Posts
    174

    Re: Greg Pullmans Pressure gauge on the road

    The Gauge is on the way to MuppetMan as we speak

  20. #20
    Senior Member
    Join Date
    Nov 2006
    Posts
    979

    Re: Greg Pullmans Pressure gauge on the road

    Got the gauge this morning and had Silva adjusted by lunch. The gauge is now on its way to prc6of7. It should be there monday or tuesday based on Australia post estimates.

    I have a 2006/07 model Silvia with adjustable opv, but without the late 07 driptray/group crome. The opv was running at a fraction under 10bar which by many accounts is better then many factory delivered machines. *Adjusting was a breeze and its now running a fraction over 9bar.

    I rarely use the same coffee for more then a few days so my analysis may be flawed however my immediate observation after adjustment was that the espresso was more balanced. The coffee I had been drinking this week was a bit of a random blend with all sorts of stuff in it that I had cobbled together for a weekend away with a large group. Essentially it was overly bright with an equally bright aftertaste that was anything but mindblowing. Mid palate sugers and fruits were present but struggleing to find their way through. The adjustment seems to have tamed this coffee somewhat. with the flavours I enjoy in coffee having more prominence. The biggest difference seems to be in the crema and mouthfeel, It seems less frothy/fizzy and more silky. I have often thought that my Silvia produced a somewhat harsh tasting espresso compared to the same coffee on professional equipment. The coffees I had this morning reminded me of the espressos Ive had from commercial machines.

    Considering that my adjustment was only minor I probably need to factor some placebo into this assessment. also the latest batch of beans have varied a bit cup to cup so take these comments with a grain of salt. Im only posting them in the context of this thread where hopefully others will also have some observations.

  21. #21
    Senior Member
    Join Date
    Jul 2006
    Posts
    604

    Re: Greg Pullmans Pressure gauge on the road

    Hey muppet man what ever the case is, thats a seriously good bit of analysis!
    Brett

  22. #22
    Member
    Join Date
    Jul 2007
    Posts
    31

    Re: Greg Pullmans Pressure gauge on the road

    Gregs pressure gauge was waiting for me in the kitchen when I arrived home from work in the wee hours of this morning.

    After a beer, shower and a good 7 hours in the sack I set to removing the spout from the group handle... not an easy task as it turns out. I ended up employing the services of my roasting heat gun and a rather large wooden mallet. I must admit I was quite scared I might break something before even really beginning!

    I found the pressure to be set at a smidge over 10 bar. This was considerably less than what I was expecting so I was not expecting to taste any dramatic difference once adjusted to the 9 bar that the OPV is now set to. Turns out I was more than presently surprised.

    Ive got to say I was never a massive fan of my own espresso. To steal a few words from muppet mans previous post, I found it was generally overly bright and quite harsh. After the adjustment I can report that what ends up in the cup is an incredible improvement. The harshness has gone, and all the flavours that you expect to taste from start to finish are there without them punching you in the face vying for your attention. Pretty much everything that muppet man reported I can echo. Needless to say, Ill be consuming a lot more of my coffee sans milk from now on!

    My plan is to double check the pressure tomorrow and then stick the gauge in the post Thursday arvo, Friday at the latest.

  23. #23
    Senior Member ozscott's Avatar
    Join Date
    Jun 2006
    Location
    BRISBANE
    Posts
    1,998

    Re: Greg Pullmans Pressure gauge on the road

    Hi Greg - will it fit my FAEMA Due? If so can I be added to the list....

    Cheers

  24. #24
    Senior Member
    Join Date
    Mar 2005
    Posts
    2,165

    Re: Greg Pullmans Pressure gauge on the road

    Hi Oz,

    Should do, so long as your group handle has a standard 3/8" thread for attaching the spouts, and looking at the portafilters that came with my Faema they look as standard as can be. Remove the spouts, fit the gauge, hey presto. Its only things like La Cimbalis that tend to have issues, heck itll even fit a EM6910!

    Greg

  25. #25
    Senior Member
    Join Date
    Jul 2006
    Posts
    604

    Re: Greg Pullmans Pressure gauge on the road

    Quote Originally Posted by 31242D3D312A2A5E0 link=1253305789/22#22 date=1255553647
    Hi Greg - will it fit my FAEMA Due? *If so can I be added to the list....

    Cheers
    Hi ozscott, my Due S was the first done! It just needed plumbers tape and worked a treat!
    Brett

  26. #26
    Senior Member ozscott's Avatar
    Join Date
    Jun 2006
    Location
    BRISBANE
    Posts
    1,998

    Re: Greg Pullmans Pressure gauge on the road

    Thanks fellas - pm received and e-mail sent Greg.

    Cheers and thanks

  27. #27
    Senior Member
    Join Date
    Feb 2009
    Location
    North Rothbury, NSW
    Posts
    1,104

    Re: Greg Pullmans Pressure gauge on the road

    Quote Originally Posted by 425740425550494948444B250 link=1253305789/23#23 date=1255557922

    heck itll even fit a EM6910!

    Greg

    Hi Greg,

    Wouldnt it be unadvisable to use it on a 6910 due to not suggested to stop the water flow completely?

    I have thought of jumping on the list to check mine, purely out of curiosity, but worried that blocking the system may cause harm...

  28. #28
    Senior Member
    Join Date
    Mar 2005
    Posts
    2,165

    Re: Greg Pullmans Pressure gauge on the road

    I guess I wasnt commenting on its suitability for a 6910 per se, rather that it would fit one should you be inclined to want to. However ruling out any specific reasons that may apply to the Sunbeam, I cant see why it would be a problem; its probably the same manufacturers warranty concerns that cause them to advise people not to backflush either. ::)

    Either case is really the same as grinding too fine and having no espresso come out as far as I can tell. Any machine at this end of the market should have an over-pressure valve which should open every time a correctly prepared shot is brewed to maintain a specified puck pressure. Sure if you get a gusher the OPV will stay closed and youll get the pumps full fury, but provided you get enough resistance the OPV will open. The aim of this exercise of course is to set the point at which that opens, and to then get the resistance in the puck through grind, dose and tamp to the point that you get the right amount of espresso flow at that pressure (which is why I dont mind if the gauges fittings leak a little bit! ;D). If theres too much resistance either through grinding too fine or pumping into a dead end such as a blind filter (backflush) or a gauge, the OPV opens as normal and the machine probably knows no different, you just wont get any flow.

    Greg

  29. #29
    Senior Member
    Join Date
    Jun 2008
    Posts
    1,520

    Re: Greg Pullmans Pressure gauge on the road

    Hey Greg and users of his gauge, i have a question (maybe 2)

    1 When using the gauge are you using the basket?
    2 does the gauge move fast around to 9bar or does the pressure come on strong and steady.

    This bit is open for discussion, i dont know either way was just thinking about it. I am sure it would have been discussed before.
    Should a needle valve be built into the gauge unit to allow water to also escape, allowing you to run a 30ml shot in 30secs while you check the pump pressure.
    Greg did you try this at all when you 1st built it?

    i was looking at the ones online when you google scace but they dont seem to let water out. Would it make any real difference?

    Leeham

  30. #30
    Senior Member
    Join Date
    Mar 2005
    Posts
    2,165

    Re: Greg Pullmans Pressure gauge on the road

    1) Nope dont use the basket or youll get lots of water leaking out around the group.
    2) Pressure builds up slowly, partly due to pre-infusion (if the machine has it) and partly because it takes a bit of time to get the system completely full of water.

    I was originally going to put a needle valve in to allow that sort of flow, but as theres normally a small amount of leakage around where the gauge screws onto the portafilter I figured that would be close enough. Some whove used the gauge use plumbers tape to make a better seal. I know some devices do have this but I have to say Id be surprised if 1ml of flow per second makes much of a difference to the absolute pressure.

  31. #31
    borat123
    Guest

    Re: Greg Pullmans Pressure gauge on the road

    Hi Greg,

    Can I be added to the list please? Whats the best way to pay you the $15?

    PS. Are the problems with La Cimbali group handles? I would like to use it on a M27.


    thanks.

  32. #32
    Senior Member
    Join Date
    Mar 2005
    Posts
    2,165

    Re: Greg Pullmans Pressure gauge on the road

    Hi Borat,

    Quote Originally Posted by 5144535146435A5A5B5758360 link=1253305789/23#23 date=1255557922
    Should do, so long as your group handle has a standard 3/8" thread for attaching the spouts...
    So itll fit your LC with no problems if it has a 3/8" outlet on the bottom of the group handle (hmm I typed porta-filter here without the dashes but some magic wizardry seems to be converting it to group handle...!), but some LCs have a rectangular outlet and the spout is held on with two screws, as in the screenshot below from coffeeparts. If your PF is like the left ones youre fine, if its the right one youll need to work out a way of attaching it in a manner that will hold pressure, or see if you can pick up a threaded pf thatll fit.

    Let me know what you find greg[at]coffeetamper[dot]com[dot]au and well sort out the admin offline.

    Greg


  33. #33
    borat123
    Guest

    Re: Greg Pullmans Pressure gauge on the road

    Hi Greg,

    Ive got one of each. The handle with the double spout has the screw on fitting as per the left on the diagram, and the handle with the single spout is the one on the right.

    cheers.

  34. #34
    Senior Member
    Join Date
    Mar 2005
    Posts
    2,165

    Re: Greg Pullmans Pressure gauge on the road

    Super, PM sent!

  35. #35
    Senior Member
    Join Date
    Jul 2006
    Posts
    604

    Re: Greg Pullmans Pressure gauge on the road

    Greg, that little offer of hiring the metered handle out has been a great service to allow a pressure check that many of us would have occasionally thought of doing, but put in the too hard basket.

    Id been thinking of buying a metered handle, but this is a fantastic option. Its been interesting noticing that people can taste the difference with a 1 bar increments. A lot of espresso machines and their owners will be much happier!

    I wonder, if when you started making your tampers, how involved youd get in the whole espresso thing?

    Brett

  36. #36
    Senior Member
    Join Date
    Feb 2009
    Location
    North Rothbury, NSW
    Posts
    1,104

    Re: Greg Pullmans Pressure gauge on the road

    Quote Originally Posted by 6570676572776E6E6F636C020 link=1253305789/27#27 date=1255572899
    I guess I wasnt commenting on its suitability for a 6910 per se, rather that it would fit one should you be inclined to want to. However ruling out any specific reasons that may apply to the Sunbeam, I cant see why it would be a problem; its probably the same manufacturers warranty concerns that cause them to advise people not to backflush either. ::)

    Greg
    They do recommend backflushing. A blinding disc with a 1mm hole in the centre is provided with the machine.

    The 1mm hole in the disc was my reason for asking about completely blocking any flow and potential damage. That is the thing that has me concerned, but as I cant adjust the pressure anyway, Ill not worry about it. :)

    Thanks

    Chris

  37. #37
    Senior Member
    Join Date
    Mar 2005
    Posts
    2,165

    Re: Greg Pullmans Pressure gauge on the road

    I guess with the leakage I experienced between the portafilter and the first brass fitting its not exactly a complete blockage. Anyway if the OPV isnt easily adjustable (any OPV is adjustable if you really want it to be ;D) its irrelevant in this context.

    Quote Originally Posted by 78696069616D7F78697E0C0 link=1253305789/34#34 date=1255651161
    Greg, that little offer of hiring the metered handle out has been a great service to allow a pressure check that many of us would have occasionally thought of doing, but put in the too hard basket.

    Id been thinking of buying a metered handle, but this is a fantastic option. Its been interesting noticing that people can taste the difference with a 1 bar increments. A lot of espresso machines and their owners will be much happier!

    I wonder, if when you started making your tampers, how involved youd get *in the whole espresso thing?

    Brett
    Thanks Brett. My position was really exactly what youve postulated; I wondered what pressure my original machine was at but I never really knew for sure and couldnt justify approaching $100 for something Id only need to do once. I could only presume others may be in the same boat and hoped thered be enough interest to offset some of the expense if I could come up with a generic option. As its turned out thats exactly whats happened.

    Thanks too for kicking off the current hire cycle. I had a feeling there would be a reasonable amount of interest but it was just a matter of someone getting the ball rolling. As my current machine was already at 9 bar I dont know the difference but its certainly encouraging hearing the improvements even when the pressure is only slightly high.

    The first tamper, well that was just for me and thats all it was ever going to be, until I opened my big mouth... ;D

    Greg

  38. #38
    Senior Member
    Join Date
    Mar 2005
    Posts
    2,165

    Re: Greg Pullmans Pressure gauge on the road

    Update on the list...

    [s]Telemaster
    Nico
    muppet_man67
    prc6of7[/s]
    bill
    ChrisD
    Ozscott
    borat123
    Bjeck14 will be in the mix somewhere too.

  39. #39
    Senior Member
    Join Date
    Jul 2007
    Posts
    539

    Re: Greg Pullmans Pressure gauge on the road

    Quote Originally Posted by 2530272532372E2E2F232C420 link=1253305789/29#29 date=1255604502
    Id be surprised if 1ml of flow per second makes much of a difference to the absolute pressure.
    Ive read that it can make 0.5 - 1.0 bar difference. Typically around 0.5bar difference on something like a Silvia, or so Ive heard.

  40. #40
    Senior Member
    Join Date
    Jul 2007
    Posts
    539

    Re: Greg Pullmans Pressure gauge on the road

    Quote Originally Posted by 767A737E7E771B0 link=1253305789/28#28 date=1255603049
    i was looking at the ones online when you google scace but they dont seem to let water out.
    The Scace device does let water out. It has a small pin hole in the bottom to allow the proper flow rate. See photo below:




  41. #41
    Senior Member
    Join Date
    Nov 2006
    Posts
    979

    Re: Greg Pullmans Pressure gauge on the road

    I found a bit of leakage more to be somewhere between 0.1-0.5 bar. The problem with leakage is its pretty difficult to measure just much flow it really is. I cant really see why under brewing conditions it would affect the opv pressure at all. When using the pressure gauge a leak affects the reading because the leak is between the gauge and the opv. Under normal brewing conditions if you were to measure the pressure the reading would be taken between the opv and the puck, regardless of coffee flow it should still read the opvs set pressure.

  42. #42
    Senior Member
    Join Date
    Nov 2006
    Posts
    979

    Re: Greg Pullmans Pressure gauge on the road

    The scace device is a different kettle of fish. Its aim is not to read a constant such as brew pressure but to profile the temperature change over the course of a shot over a 30 second period. Therefore it needs to exibit the characteristics of pulling a shot.

  43. #43
    Senior Member
    Join Date
    Mar 2005
    Posts
    2,165

    Re: Greg Pullmans Pressure gauge on the road

    Yep I think Id agree as per comment #27. The pumps pushing out 15 bar into a dead end, the OPV opens at 9 and the flow from the remaining 6 bar gets fed back to the reservoir. With a bit of a leak the pump output may drop to 14 bar or whatever but it just means theres less water getting rejected; the pressure in the group would be the same.

    When I brew a shot on my Expobar its gauge normally goes up to 9.5 bar. When I backflush its 9.5 bar. So the pressure inside the brewing circuit is the same whether theres a little bit of flow or none. Im sure a precise gauge like the one on tour could be rigged up to the water inlet to the boiler and use a needle valve to slowly vary the flow, but I think observing my machines gauge in normal use is a good enough indication for me.

    Greg

  44. #44
    Senior Member
    Join Date
    Jun 2008
    Posts
    1,520

    Re: Greg Pullmans Pressure gauge on the road

    I knew asking might open a can of worms..... about diff ideas.

    The needle valve idea was to ad the possibility of changing the flow rate a little during the shot and watching the effect on pressure and temp. I have a few parts laying around, i made a gauge set up but cannot find my 1/4 inch tees to add in a needle valve. *

    I am just getting my head around the theory, the way I make coffee does not need this level of perfection for me but i should have the machine hitting the mark even if i cant :). I was surprised when i put the gauge on the Ghandle and banged it on the machine it hit 9bar (130psi). I had not checked it before today, and thought i might need to lower the pressure a bit actually *


    Not wanting to take the thread to far off topic, thanks for the input *:)

    Leeham

  45. #45
    Senior Member
    Join Date
    Jul 2007
    Posts
    539

    Re: Greg Pullmans Pressure gauge on the road

    Quote Originally Posted by 2D35303025341F2D212E7677400 link=1253305789/40#40 date=1255663706
    I cant really see why under brewing conditions it would affect the opv pressure at all.
    Nevertheless, it does. I believe its something to do with how far the spring in the OPV is compressed. In actual use during a real shot, a portion of the water goes through the group, and a portion goes out the OPV. During pressure testing with a gauge though, ALL the water goes out through the OPV (so for example, say 200ml per min. vs. 140ml per min. through the OPV). Higher flow out the OPV means the OPV valve is open a larger amount than during a normal shot, therefore the OPV spring is more compressed, therefore spring pressure is higher, therefore water pressure is higher.

  46. #46
    Senior Member
    Join Date
    Jul 2007
    Posts
    539

    Re: Greg Pullmans Pressure gauge on the road

    Quote Originally Posted by 7860656570614A78747B2322150 link=1253305789/41#41 date=1255663862
    The scace device is a different kettle of fish. Its aim is not to read a constant such as brew pressure but to profile the temperature change over the course of a shot over a 30 second period. Therefore it needs to exibit the characteristics of pulling a shot. *
    The Scace2 measures both temp and pressure during the simulated conditions of extracting a real shot.

  47. #47
    Senior Member
    Join Date
    Jul 2007
    Posts
    539

    Re: Greg Pullmans Pressure gauge on the road

    The gauge is now on itís way to ChrisD.

    My Faema was around 10.5bar, now adjusted down to 9.0bar. I needed to use thread tape on the group handle as it sprayed water everywhere without it. I was actually able to alter the amount of leak to simulate an actual shot. With 3 winds of thread tape I found I had 30ml of leak in 30 sec, and by loosening the connection slightly I was able to achieve close to 60ml in 30 sec. (I had a cup placed under the gauge to capture the water that trickled out) 9.0bar at 60ml leak equaled 9.25bar at 30ml leak by my measurements. Iíve also marked my OPV with marker pen at where 8.5, 8.75, 9.0, 9.25 & 9.5bar is, in case I want to do some experimenting in future. The flavour of the coffee seems slightly better defined now, but itís a bit difficult to tell as Iíve just changed to a different roast batch. I suppose I should try a commercial blend that Iím more familiar with to see what difference I can discern.

  48. #48
    Senior Member
    Join Date
    Mar 2005
    Posts
    2,165

    Re: Greg Pullmans Pressure gauge on the road

    Interesting Bill... maybe I should add that needle valve to the gauge once I get it back (as well as fixing the cracked fitting). And then send it back to you all for a second time! ::)

  49. #49
    Senior Member
    Join Date
    Jun 2008
    Posts
    1,520

    Re: Greg Pullmans Pressure gauge on the road

    Quote Originally Posted by 4D6663630F0 link=1253305789/46#46 date=1256475090
    Iíve also marked my OPV with marker pen at where 8.5, 8.75, 9.0, 9.25 & 9.5bar is, in case I want to do some experimenting in future.
    Hey gauge users, yesterday I had some pressure issues with a "procon" pump, anyway after pulling it down and finding the adjuster binding (scale) a bit i got it to come back up to pressure OK again.
    To test it I put the pump on the bench beside the machine instead of underneath the bench were the actual pump hides.

    I am not using Gregs gauge so my PSI may be slightly diff to his gauge. i assume it is fairly accurate.

    I then pulled a series of shots and each time changed the PSI about 5 points 120-125-130-135-140 just to see the difference on the pour. I kept the same grind and hope I kept the same tamp and dose.

    Anyway i found that around the 135 the shot came on very nice in the pour BUT the beans i am using are a bit burnt (a bad roast last week). So taste is not a factor in my shots, but the crema etc looks good.

    Bills idea of marking the OPV / adjuster is a really good one, you then could dial in a bit more or less pressure.

    It even crossed my mind to leave the pump on the bench a bit longer and trying a few "paddle" shots using the adjustment on the pump on the pour..... with some nice beans :)

    Just thought i would post, someone might find it useful and get some interesting results.

  50. #50
    Member
    Join Date
    Mar 2009
    Posts
    57

    Re: Greg Pullmans Pressure gauge on the road

    Behmor Brazen - $249 - Free Freight
    Ok So gauge has been used and tested a couple of times... now at 9.5 bar with no leakage I was surprised to find i was under pressure at a flat 8 bar with zero leakage before adjustment... i thought that given the pstat was running at 1.6 bar when i first picked up the Grimac the OPV would be set at a 10 or 11.

    As for taste/flavour, i dont know if it was luck, coincidence or sheer brillance from me but i got the best flavour out of my veneziano estate blend i have ever been able to pull... I think i could even rival some of the shots i have had from Dancing Goat of late (Jesses on the trip to Italy he won in Aus Barista Champs).

    Guage is now on it way to Greg Pullman for some repares and will hit the road again once he is done.

    Cheer

    Chris



Page 1 of 7 123 ... LastLast

Similar Threads

  1. pressure gauge
    By Gra in forum Brewing Equipment (non-machine specific)
    Replies: 21
    Last Post: 7th May 2012, 05:27 PM
  2. Replies: 0
    Last Post: 21st September 2009, 03:52 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •