Fermentor PRV PSI

[tdornblaser]

We just purchased a few fermentors they didn't come with PRV's. I have found several different places to buy them (GW Kent, brewershardware, etc...) however I note that they can be purchased in 15 psi and 30 psi. How do I know which I should be purchasing? Our FV have a max pressure of 36 psi (.25 Mpa) and a working pressure of 21 psi (.15Mpa).

Sorry for what may be pretty basic question!

Thanks!

[krichard]

We just purchased a few fermentors they didn't come with PRV's. I have found several different places to buy them (GW Kent, brewershardware, etc...) however I note that they can be purchased in 15 psi and 30 psi. How do I know which I should be purchasing? Our FV have a max pressure of 36 psi (.25 Mpa) and a working pressure of 21 psi (.15Mpa).

Sorry for what may be pretty basic question!

Thanks!

You shouldn't need anything above 15PSI depending on your usage. We use our fermenters as true uni's, crashing and carbing in the fermenter and all have 15 PSI PRV's.

[Sungood-Machinery]

You need to confirm the pressure rate with your supplier.
General speaking it can hold 15psi.
If inner thickness>/=3mm,maybe can hold 25-30psi.
I think the FV should come with PRV,for free.
You don't have to buy it in addition.

[tdornblaser]

You need to confirm the pressure rate with your supplier.
General speaking it can hold 15psi.
If inner thickness>/=3mm,maybe can hold 25-30psi.
I think the FV should come with PRV,for free.
You don't have to buy it in addition.

The inner walls are 3mm and I have told working pressure is 21 psi and max pressure is 36 psi.

[tdornblaser]

You shouldn't need anything above 15PSI depending on your usage. We use our fermenters as true uni's, crashing and carbing in the fermenter and all have 15 PSI PRV's.

Thank you krichard! We intend to use them as true uni's as well.

[TGTimm]

The best PVRV valves we've found are made by Definox. 15 psi will handle anything a fermenter is meant to do, and if your vessel is rated a bit higher, that's good insurance.

Notice I wrote "PRVRV", not "PRV". The extra V is for Vacuum, and if you don't have vacuum protection, you may get to witness an expensive vessel collapse from a seemingly small mistake--caustic sprayed into CO2, cold water sprayed into a hot vessel, draining the vessel without opening a vent, etc. The Definox vacuum-relief is set at 0.1 psi, and works flawlessly.

If you mean to force-carbonate or naturally carbonate in the fermenter, you'll also want a good, adjustable, Pressure Control Valve. Ours are made by Handtmann and are adjustable from nearly 0 psi to 15 psi.

[steelhead26]

Fementor VPRV

Tassalini and Definox are both solid choices. The Tassalini VPRV are also adjustable if that helps you out.

Adam

[Bainbridge]

As I understand it in most states, certainly in Washington, if a tank is to be under no more than one Bar of pressure (15psi) it does not need to be certified by ASME and it does not require periodic inspection by state pressure vessel inspectors. Something to think about when the Boiler Inspector comes around.

That and the whole exploding thing.

[TGTimm]

In Oregon, it's under 1 bar (15 psi).

That, and the whole imploding thing! https://www.google.com/search?q=beer...utf-8&oe=utf-8

[Bainbridge]

Hah yeah! Think this one shows a good reason why you don't heat up a tank to clean it, cap it, then "ooops, left the glycol on!"

[Bainbridge]

Tassalini and Definox are both solid choices. The Tassalini VPRV are also adjustable if that helps you out.

Adam

We've got Tassalinis here. And so I can add something actually useful to this thread beyond amusing youtube videos, you can make a rig with a triclamp T where one end is your VPRV, one end is a trusted gauge, and one end is some connection to your co2 system. Pressurize to 15psi (or whatever you want it at) and then you can adjust the VPRV to hiss at that pressure. We do this periodically to check each one, they can get out of whack over time. And do it if you blow one sometime (and you will), you should check it next chance you get in case it got out of adjustment.

[barleyfreak]

We've got Tassalinis here. And so I can add something actually useful to this thread beyond amusing youtube videos, you can make a rig with a triclamp T where one end is your VPRV, one end is a trusted gauge, and one end is some connection to your co2 system. Pressurize to 15psi (or whatever you want it at) and then you can adjust the VPRV to hiss at that pressure. We do this periodically to check each one, they can get out of whack over time. And do it if you blow one sometime (and you will), you should check it next chance you get in case it got out of adjustment.

I need to test my Tassalinis and this looks easy to set up. What type and where did you get your "trusted gauge".

[TGTimm]

We've got Tassalinis here. And so I can add something actually useful to this thread beyond amusing youtube videos, you can make a rig with a triclamp T where one end is your VPRV, one end is a trusted gauge, and one end is some connection to your co2 system. Pressurize to 15psi (or whatever you want it at) and then you can adjust the VPRV to hiss at that pressure. We do this periodically to check each one, they can get out of whack over time. And do it if you blow one sometime (and you will), you should check it next chance you get in case it got out of adjustment.

I use our pressure gauge tester to periodically test our pressure valves. It adds some peace of mind. The TC flange is for attaching pressure valves. Just crank the regulator up until the valve starts to release and note the pressure on the digital gauge.



We use fixed PVRVs to protect our tanks, and adjustable spunding valves for spunding. Belt and suspenders.