Originally Posted by badbrew
That's a pretty heavy duty valve, hopefully not too heavy duty. It says it maxes out at 125 cu ft/ min and operates at between 5 and 125 psi. I made one too. I used about 5 feet of 5/16" tubing though. I don't want to use a blow off setup if I can avoid it. I used a 1-100 psi relief valve. The only thing that concerns me is how much relief it gives each time. When I was testing it on a primed keg, one keg pressure dropped to 0 while I was fooling around. I guess I won't know until I put it to the real test.
OP, what pressure do you plan to set it at?
I added the spec sheet link for the valve. Folks are using another lower cost valve
with success, the Norgren is middle of the road cost wise with the valve from McMaster-Carr being the most expensive used for the application.
I plan to start at 5psi then bump it up after the vigorous fermentation is over and after checking the attenuation. How high will depend on on the temperature I'm able to maintain with a swamp cooler & the amount of CO2 required to carbonate. I might stick a hose barb & hose on the outlet and stick it in a bottle of sanitizer to gauge the amount of CO2 coming out. Debating on using a secondary keg. I've had the valve apart, nothing special about it, easy enough to clean if it gets gunked up. I'm thinking of tilting the corny during initial fermentation to possibly help with keeping the krasen out of the valve and also to let the bulk of the trub settle away from the dip tube. Don't know if either will work, like I said I'm still an amateur. If krausen becomes a problem then I might do the two corny thing.