Comment on Absuing a keg as a bung valve
evasive_chimpanzee@lemmy.world 4 months ago
I just did the conversion, and 1 psi = 70 cm h20. That means you only need less than a psi to get the sanitizer moving. I think the bucket can likely hold that. You might want to add weight to the lid to make sure there’s no leakage from the outside edge of the bucket.
Aarkon@feddit.de 4 months ago
Thanks for the calculation! It didn’t cross my mind to roll the numbers, that’s quite reassuring.
Thinking about everything now, I think I should elevate the can to the level of the liquid post of the keg, to avoid a siphoning effect where all the sanitiser goes through the line in one go once it gets into motion. 🤔
evasive_chimpanzee@lemmy.world 4 months ago
That probably shouldn’t happen, cause it would pull a vacuum on your beer (wonder what effect that would have). It might be able to pull a siphon for a short time, and then cut off. You would then have like an oscillation of pressure on your beer which probably isn’t ideal. Definitely a good move to put the can higher.
I wonder if there’s a good way to prevent any siphoning from going the other way.
Aarkon@feddit.de 4 months ago
Uh, I haven’t even thought about the possibility of reverse siphoning. Maybe better I’d better leave the can where it is? To my understanding, siphoning “uphill” is way harder (if even possible at all, given a specific liquid, height, tube diameter etc). The possible pressure oscillation sounds less “threatening” to me right now.