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Dry Irish Stout
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Master



Joined: 30 Jan 2016
Posts: 170
Location: Virginia Beach, VA

Drinking: Naked Singularity Stout, Hurricane Bohemian Pilsner, Pineapple Cider, Ich bin ein Berlinerweiss, AbbyNormal Glutton Free Lambic

Working on: Vienna Lager. Witty name to follow.


PostLink    Posted: Sat Nov 02, 2019 12:16 am    Post subject: Reply with quote


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So tapped the Nitro Stout last night. It's been on 75/25 Beer Gas Mix at 35psi for a month.

DEAD FLAT. Zero head. Zero Cascade. Fridge temp 38F

Pours at expected speed through a Stout Faucet. Tastes good, but DEAD FLAT.

Any ideas?
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kal
Forum Administrator


Joined: 12 Dec 2010
Posts: 10557
Location: Ottawa, Canada

Drinking: German Lager, Electric Creamsicle, London Pride, Kolsch, German Pils, Belgian Dubbel, Russian Imperial Stout, Black Butte Porter

Working on: Weizen, Belgian Quad, Belgian IPA


PostLink    Posted: Sat Nov 02, 2019 1:23 pm    Post subject: Reply with quote

Odd. Either you're not actually at 35PSI, or there's no CO2 in there, or both.

Kal

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Master



Joined: 30 Jan 2016
Posts: 170
Location: Virginia Beach, VA

Drinking: Naked Singularity Stout, Hurricane Bohemian Pilsner, Pineapple Cider, Ich bin ein Berlinerweiss, AbbyNormal Glutton Free Lambic

Working on: Vienna Lager. Witty name to follow.


PostLink    Posted: Sat Nov 02, 2019 5:51 pm    Post subject: Reply with quote

Yeah. The bottle came with a cert tag with traceability on the batch. My spunding valve agrees within 2%.

Only way for me to know if the beer gas is proper is to run it through a mass spec.

I guess I could run it over some Lithium hydroxide and see if it makes O2, but that's another problem.

Anyone know of a non mass spec way of testing for CO2 in a mix? Straight Nitro would act like this. I had similar effects when I pushed with Argon as a test for pushing a long run uphill.
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kal
Forum Administrator


Joined: 12 Dec 2010
Posts: 10557
Location: Ottawa, Canada

Drinking: German Lager, Electric Creamsicle, London Pride, Kolsch, German Pils, Belgian Dubbel, Russian Imperial Stout, Black Butte Porter

Working on: Weizen, Belgian Quad, Belgian IPA


PostLink    Posted: Sat Nov 02, 2019 10:39 pm    Post subject: Reply with quote

Master wrote:
Yeah. The bottle came with a cert tag with traceability on the batch.

I'm not sure what you mean by this. You mean the beer / gas blend bottle came with a cert tag? That's very odd as there's no need for this sort of accuracy on beer gas blends or straight CO2 or Nitro bottles. Was this a NIST traceable cert tag? And batch of what exactly? CO2 is CO2, nitrogen is nitrogen. Where you using some sort of special medical lab certified bottle for brewing where they guarantee there are no other impurities in the cylinder? (That isn't required for serving beer on tap).

Quote:
Anyone know of a non mass spec way of testing for CO2 in a mix? Straight Nitro would act like this. I had similar effects when I pushed with Argon as a test for pushing a long run uphill.

It sounds like you're not using a beer gas blend from somewhere that normally serves bars? This blending is not rocket science nor does it require much accuracy (there's a lot of leeway). When I take mine in it's to a place that does most of their business refilling fire extinguishers. They ask what blend ratio I want and do it with a scale (so much weight CO2, so much nitro). Doesn't have to be perfect, still works. They fill gas cylinders for 100's of bars around town.

Kal

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Master



Joined: 30 Jan 2016
Posts: 170
Location: Virginia Beach, VA

Drinking: Naked Singularity Stout, Hurricane Bohemian Pilsner, Pineapple Cider, Ich bin ein Berlinerweiss, AbbyNormal Glutton Free Lambic

Working on: Vienna Lager. Witty name to follow.


PostLink    Posted: Sat Nov 02, 2019 11:50 pm    Post subject: Reply with quote

They do fill cylinders for local bars. That's why I'm scratching my head on it.

Tag on the cylinder is just Customer #, Name, Job No.

I can't find the ticket at the moment but it had batch number of both CO2 and N2.

This is the same place I get some high purity and general welding gases I need for projects, (I have a regular account here) so I think they just put traceability on all my stuff because I do some aerospace welding and I have to have 100% traceability on process, to include shielding and purge gases. . Was like $24.

That's why I think bad gas is a low probability thing, but I'm kind of at a loss otherwise. Plenty of time. At the right temp. Partial pressure is right for the volumes CO2 . It's just weird that it's dead flat.

Might take it of Beer Gas, put it on a regular CO2 line for a week at 12psi after bleeding the pressure off, and let it sit.

Solubility of N2 at 5C is about .025g/kg and CO2 is about 2.8g/kg, so the N2 left in the beer after I bleed/purge the headspace would be very little, even if it was accidentally a batch of 100% N2.
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kal
Forum Administrator


Joined: 12 Dec 2010
Posts: 10557
Location: Ottawa, Canada

Drinking: German Lager, Electric Creamsicle, London Pride, Kolsch, German Pils, Belgian Dubbel, Russian Imperial Stout, Black Butte Porter

Working on: Weizen, Belgian Quad, Belgian IPA


PostLink    Posted: Sun Nov 03, 2019 12:13 am    Post subject: Reply with quote

Certainly odd! I don't have enough information to explain why it's flat.

Kal

_________________
Our new shop with over 150 new products: shop.TheElectricBrewery.com
Purchasing through our affiliate links helps support our site at no extra cost to you. We thank you!
My basement/bar/brewery build 2.0
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View user's photo album (21 photos)
Master



Joined: 30 Jan 2016
Posts: 170
Location: Virginia Beach, VA

Drinking: Naked Singularity Stout, Hurricane Bohemian Pilsner, Pineapple Cider, Ich bin ein Berlinerweiss, AbbyNormal Glutton Free Lambic

Working on: Vienna Lager. Witty name to follow.


PostLink    Posted: Sun Nov 03, 2019 7:48 pm    Post subject: Reply with quote

Pulled it off the beer gas. Purged headspace, and put on CO2.

Will let sit for a while and report back.
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