Looking for the best way to move cold EtOH from keg to keg, any input/inspiration is very appreciated.
To be honest, Future’s Bucket tek upgrade is not 100% clear to me. I understand he uses pressure from a compressor to move the EtOH but don’t get the full setup/approach. Does it only work with raised barrels/kegs with drains in the bottom?
If we’re talking down to -40/-50C a regular Ingersoll ARO or similar diaphragm pump powered by compressed air will get the job done. Below that you get into more specialized materials and higher costs in a diaphragm style pump. I’m leery to recommend compressed air to push the solvent around because the regulators tend to be way crappier quality on compressed air as well oxygen + flammable solvent is a recipe for a bomb. Nitrogen or CO2 are both far better options if you’re going to use a compressed gas to push. Should invest in a PRV if you’re going to use a compressed gas push, I see that lacking in a lot of labs that are posting keg pics on IG.
It’s like pushing with air bc it can positively displace the liquid. The temps won’t matter bc it won’t touch them and it won’t move as slow as a regular vacuum pump but it will in fact vacuum it out.
If it’s not already under blanket gas I’d imagine your oxidation risk is present and for what it is worth there is something called a bulldog which is used to create positive displacement in wine transfer or any barrels, spirits or ethanol related products. I have the more expensive version but they all work. Just different levels of fancy.
Most people are storing in kegs and beer glass carboys from what I can tell and the bull dogs are good for pushing.
The diaphragm punks are good for pulling. And depending on the wetted parts, they may work for cold temps but mag drive pumps are the best for cold
Explosion proof ones start around 1600$ and got up to the moon quickly.
Diaphragm pumps are very good at moving volume, so once you get past a small volume of say 60-100 gallons you’ll wanna step up to a diaphragm and pull vs using displaced air which may cost you a full tank of nitrogen.
There are tank calcs though for how many cubic feet the nitrogen tank will be to base your displacement volume.
Don’t dead head a diaphragm or it will blow the fitting off your receiving tank and crush the transfer tank. Oxidation for me, is less a concern in alcohol but to each their own.
If you are gonna worry about all that, then you’d wanna go a little further and blanket all your tanks first. Use a lighter to see if the tank is oxygen free. Unused and empty of course before your literal jerkies start talking shit bc your common sense brethren may cut themselves while running high with scissors blade exposed.
The lighter won’t light without oxygen so you know it’s displaced.
Often you can’t vacuum things like kegs and alcohol transfer items. It’s not like butane and pressure vessels… the cost is much lower for a reason.
Thats not totally true, you can use a plastic magnetic drive pump to move freezing cold ethanol as long as its not too cold (below -40 C). These pumps are like $50 max and they have decent flow rates at that price.