Spunding valves

[Will_D]

Anyone have a link to a shop (prolly USA based) thast sells these to fit onto a corny gas post, with pressure gauge and adjustable reliedf valve?

[Bazza]

I got mine here, if it's any use to you? UK based as well.

https://www.hopandgrape.co.uk/adjustable-pressure-release-valve-gauge-for-cornelius.html

Cheers,

- Barry

[pob]

slightly cheaper, if you don't mind the usual 6 week Ali delay

[Will_D]

Thanks for the ifo guys. So guess who's into spunding!

Why do I want to ferment under pressure?

I don't!

What I have found is that putting pasteurised, sweetened ciders into cornie kegs often leads to a tertiary fermentation!

How is this possible?:

The kegs are clean and sanitised but just maybe the gas lines have been contaminated with yeast from previous beers getting into the gas lines!

Well that's my theorey any way.

So I will just use the valves and gauges as a measure of whats happening in my cider cornies.

[Leann ull]

Will every couple of months I climb the shelves with the 2kg tank starsan bottle and give the 12 cider cornies a squirt and purge of 1 bar.

[SkiBeagle]

http://www.braupartner.de/shop/Nachgaeren_Lagern_Spunden.chtml
€20+VAT. And you get a chance to brush up on your German! (Alternatively, a nice man from Google will translate it for you.)
-Ski

[Will_D]

Just got two from HopandGrape (link above) appart from the fact I had to reset the pointers (one was reading 10 psi and the other was about -8 psi) they are pretty good value for £25.

[cruiscinlan]

Any reason I couldn't use one of these: http://www.ebay.co.uk/itm/Air-Compressor-1-4-Pressure-Regulator-Gauge-140PSI-Regulating-Control-Valve-/322238709816?hash=item4b06ec8038:g:2O0AAOSw0UdXvWVm

[Sorcerers Apprentice]

Looks a bit coarse, it's rated at 12 bar, you're looking to apply a top pressure of  maybe up to 1 bar, you can see further up the page there's a link from pob to an eBay one rated at 1 bar.

[cruiscinlan]

Looks a bit coarse, it's rated at 12 bar, you're looking to apply a top pressure of  maybe up to 1 bar, you can see further up the page there's a link from pob to an eBay one rated at 1 bar.

I think thats an aliexpress link.  But a 1 bar guage would be useless for carbonating or checking for leakages you'd think? 

[Sorcerers Apprentice]

I'm not sure what you're trying to do with the spunding valve? Normally it's for fermenting under pressure. You fill the corny with wort and yeast and close it up. Stick the spunding valve on the gas post and allow the keg to pressurise to about 1/2 a bar. If the pressure rises above this the spunding valve opens like a pressure relief valve, and maintains the 1/2bar top pressure. This speeds up the fermentation process by allowing you to ferment at warmer temperatures. The top pressure supresses the volatiles preventing off flavours . Similarly you can condition in the keg by adding priming sugar and close it up. 2.2 vols of CO2 is a little over 1/2 bar maybe 0.6 bar.

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[cruiscinlan]

I'm not sure what you're trying to do with the spunding valve? Normally it's for fermenting under pressure. You fill the corny with wort and yeast and close it up. Stick the spunding valve on the gas post and allow the keg to pressurise to about 1/2 a bar. If the pressure rises above this the spunding valve opens like a pressure relief valve, and maintains the 1/2bar top pressure. This speeds up the fermentation process by allowing you to ferment at warmer temperatures. The top pressure supresses the volatiles preventing off flavours . Similarly you can condition in the keg by adding priming sugar and close it up. 2.2 vols of CO2 is a little over 1/2 bar maybe 0.6 bar.

2.2.volumes is 2.2 bar surely?

I'd also want a higher pressure than 1 bar to check the kegs for leaks. That's another use I would plan to use the spunding valve for.

[Sorcerers Apprentice]

It's temperature dependent but at normal serving temperature 2.2 vol a good bit less than a bar.  Depending on how cold you drink your beer it could be as low as 4-5 psi.
For leak checking you'd use some soapy water applied around all the fittings and seals and check for bubbles with the keg charged with gas, if you're planning on using a gauge to monitor for leaks, then the lower the range on the gauge the easier it would be to see any small drop in pressure. You'd only need a gauge connected to a keg disconnect for this you wouldn't need a spunding valve

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[Sorcerers Apprentice]

Vols of CO2 is a volumetric measurement, if you have a keg with a capacity of say 20 litres, then you will need 44 litres of CO2 dissolved in the beer (20 x 2.2). The pressure required to maintain the 44 litres of CO2 within the beer will depend upon the temperature of the beer. The lower the temperature the lower the pressure required 

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