Help Support Aussie Homebrewer by donating:

  1. We have implemented the ability to gift someone a Supporting Membership now! When you access the Upgrade page there is now a 'Gift' button. Once you click that you can enter a username to gift an account Upgrade to. Great way to help support this forum plus give some kudos to anyone who has helped you.
    Dismiss Notice

Spunding Valve

Discussion in 'Gear and Equipment' started by rude, 22/3/16.

 

  1. rude

    Well-Known Member

    Joined:
    7/5/08
    Messages:
    1,430
    Likes Received:
    213
    Gender:
    Male
    Posted 22/3/16
    Just wondering who uses what type of valve for pressure fermenting

    Have seen the KK ones but apparentley they are very touchy to control

    Have looked for some in RS spares as below

    SMC AP100 Rc 1/4 Female Pressure Relief Valve Female RC 40mm 1/4in, 0.05 → 1Mpa

    This one was $85 bit dear but if it is good will part with the cash

    They are listed under pneumatic or exhaust ppr valves

    The range is in Mpa is that measurement 1Mpa, one million pascals ?

    I have sent e-mail to CraftBrewer but no reply as their RegQDvar looks ok adjustable up to 100psi
    & comes with the gauge & bits ready to go ,anyone have one of these & do they adjust well ?

    Would like a valve that goes up to at least 30psi so kegs finish carbed

    All advice appreciated Rude
     
  2. takai

    Well-Known Member

    Joined:
    1/11/14
    Messages:
    577
    Likes Received:
    168
    Gender:
    Male
    Location:
    Prahran, VIC
    Posted 22/3/16
    Last edited by a moderator: 27/10/18
  3. rude

    Well-Known Member

    Joined:
    7/5/08
    Messages:
    1,430
    Likes Received:
    213
    Gender:
    Male
    Posted 22/3/16
    How do you find this for adjustments hit & miss
    Do you mean hard to adjust for say 15psi

    What application do you use it for ?

    Thanks for reply
     
  4. Danscraftbeer

    Well-Known Member

    Joined:
    1/4/15
    Messages:
    2,629
    Likes Received:
    981
    Gender:
    Male
    Location:
    Victoria
    Posted 22/3/16
    The KK one works fine actually. Its fine adjustment but does set right as long as the pressure is there. I replaced the 15psi guage with an 80 psi.
     
  5. TheWiggman

    Haters' gonna hate

    Joined:
    17/9/13
    Messages:
    2,779
    Likes Received:
    1,811
    Gender:
    Male
    Location:
    Location
    Posted 22/3/16
    Ginger beers get all pedantic about units but this is why.
    M = mega
    Pa = Pascal. Big P, small a. Small p means something different.
    M is 10^6 or 1 million, yes.
    1 atmosphere is around 0.1 MPa or 101.3 kPa. If the gauge you are looking at has MPa increments it's too high for the purpose of adjusting for carbonation pressure. Carb is typically around 70-85 kPa (0.07 - 0.085 MPa) for most beers.
     
  6. MastersBrewery

    Journeyman, the learning never stops

    Joined:
    7/6/11
    Messages:
    2,319
    Likes Received:
    681
    Gender:
    Male
    Posted 22/3/16
    Ahh but the device link was rated min spec of 0.05MPa so 50kPa if using for pressure fermenting then pressures used are between 15 and 22psi and I know thats more than 100kPa but CBF doing the conversion. Another member has used that gauge for pessure fermenting and it apparently was easier than the off the shelf spunding valves. Obviously way pricier and you'd still have to track down a guage and fittings.

    MB
     
  7. mb-squared

    Well-Known Member

    Joined:
    17/2/14
    Messages:
    392
    Likes Received:
    151
    Gender:
    Male
    Posted 22/3/16
    Last edited by a moderator: 27/10/18
  8. rude

    Well-Known Member

    Joined:
    7/5/08
    Messages:
    1,430
    Likes Received:
    213
    Gender:
    Male
    Posted 22/3/16
    Thanks Wiggman this is a valve not a gauge so 0.05 Mpa to 1Mpa would alow me to carb
    albeit at the lower end of the adjustment

    So using a converter 7 psi to 145 psi or 50kpa - 1000kpa hopefully I have it right

    Thanks Danscraft so its not too bad good to hear
    Would like something up to 30 psi though as that one only goes to 15 psi but still not bad
    What & where did you buy you're gauge 80psi

    Still waiting for feed back on CraftBrewer's valve gauge set up as it looks ok too
     
  9. rude

    Well-Known Member

    Joined:
    7/5/08
    Messages:
    1,430
    Likes Received:
    213
    Gender:
    Male
    Posted 22/3/16
    Replied too quick cheers all

    mb squared sounds like the go using a cornie to put the valve on to keep dry

    MB yes have to source gauge fittings works out a bit pricey but if it works better then will go that road
     
  10. trevgale

    Well-Known Member

    Joined:
    4/6/13
    Messages:
    120
    Likes Received:
    34
    Gender:
    Male
    Posted 22/3/16
    I tried the keg king spunding valve and found it to be impossible to set accurately. I looked at getting a different style one from the US and decided that I would make a digital one instead. I bought a pressure transducer and a pressure controller from Auber Instruments and a 1/4" solenoid valve of ebay. I put it all in a project box and connected it to the gas in port using a quick disconnect. It lets me accurately set the pressure and be confident it is set right.

    I ferment in 50L kegs and typically start at 5psi and then set it to 15psi near the end of fermentation during a diacetyl rest. I then crash chill it and it is fully carbonated naturally. As well as saving on CO2 it also means I can serve straight away if I need to. One time I just hooked a filter inline and served directly from the fermenter.
     
    2 people like this.
  11. Danscraftbeer

    Well-Known Member

    Joined:
    1/4/15
    Messages:
    2,629
    Likes Received:
    981
    Gender:
    Male
    Location:
    Victoria
    Posted 22/3/16
    I got the 80psi gauge at KK too. Its exactly the same.
    Just unscrew the 15. Screw in the 80. With some plumbers sealant tape. Low cost.
     
  12. mb-squared

    Well-Known Member

    Joined:
    17/2/14
    Messages:
    392
    Likes Received:
    151
    Gender:
    Male
    Posted 22/3/16
    hey trevgale, any chance you could post some links to the bits and pieces? I'd like to look into this.

    cheers,
     
  13. MastersBrewery

    Journeyman, the learning never stops

    Joined:
    7/6/11
    Messages:
    2,319
    Likes Received:
    681
    Gender:
    Male
    Posted 22/3/16
    one of the guys over at HBT did similar but used an arduino or rpi to not only change set pressure and temp, he was using an off the shelf mass flow controller and therefore able to measure expelled Co2 and therefore approximate gravity, if you call accuracey of .001 approximate.
     
  14. mb-squared

    Well-Known Member

    Joined:
    17/2/14
    Messages:
    392
    Likes Received:
    151
    Gender:
    Male
    Posted 22/3/16
    wow, this hobby just keeps getting more and more interesting...
     
  15. trevgale

    Well-Known Member

    Joined:
    4/6/13
    Messages:
    120
    Likes Received:
    34
    Gender:
    Male
    Posted 22/3/16
    No worries, these are the main components.

    Pressure Controller
    Pressure Sensor
    Solenoid Valve

    The only other components are a 1/4" tee, 1/4" hose barb, hose, gas disconnect, plastic project box from jaycar, power cable and a 1/4" end plug.

    When I first put it together I just had the open end of the solenoid valve to release the pressure. However this would release too much pressure due to the ~1sec cycle time. Anyway I put a plug in the end of the solinoid with a 1mm hole drilled in it and this did the trick.

    So it's not cheap but it does work perfectly and you can both see the exact pressure it is at and set the desired pressure.
     
  16. barls

    causer of chaos and mayhem

    Joined:
    30/1/05
    Messages:
    6,167
    Likes Received:
    783
    Gender:
    Male
    Posted 22/3/16
  17. rude

    Well-Known Member

    Joined:
    7/5/08
    Messages:
    1,430
    Likes Received:
    213
    Gender:
    Male
    Posted 22/3/16
    Hey Barls you're my man how do you find it easy to adjust

    Trevgale very impressive I assume you do lagers mainly
    Any reason you don't just ferment at 15 psi all the way or nearly to the end
     
  18. barls

    causer of chaos and mayhem

    Joined:
    30/1/05
    Messages:
    6,167
    Likes Received:
    783
    Gender:
    Male
    Posted 22/3/16
    i use mine for naturally carbing. its pretty easy turn until i get the number i want
     
  19. trevgale

    Well-Known Member

    Joined:
    4/6/13
    Messages:
    120
    Likes Received:
    34
    Gender:
    Male
    Posted 22/3/16
    I mainly use it for lagers, I wanted to experiment with pressure fermentation and was not happy that I could get repeatable results with the manual spunding valve. Fermenting at higher pressures can potentially result in damage to the yeast and result in not achieving full attenuation, based on what I have read. I am still playing around with it.

    As I ferment in 50L kegs I tend to use it on all brews, even if it is only at 1psi just so that I can take samples during fermentation. It also make natural carbonation easy.
     
  20. Danscraftbeer

    Well-Known Member

    Joined:
    1/4/15
    Messages:
    2,629
    Likes Received:
    981
    Gender:
    Male
    Location:
    Victoria
    Posted 22/3/16
    Makes me think of a pressure schedule. Start low to ease the yeast and grade up the pressure over a week? But that's not really simulating the commercial technique which is what we are trying to achieve isn't it? I took 15psi as a standard setting all the way. No need to adjust. Then again I cant see anything wrong with setting the pressure much lower. 1 to 10psi until it stops hissing then tighten the valve for another week. Done! chill, lager, transfer or just dispense and drink.
    Ageing preferred.
     

Share This Page