Pressure Fermentation DIY vessel?

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mcscruff

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Hi all,
Jut thinking about stuff i have... I have some empty keykegs. If i were to drill out the top (just enough to remove the bag), Do you think if i 3d printed a cap/lid to cover the drilled out hole, this would be possible to use for pressure fermentation?
Obviously i would be adding a spunding valve, and knowing a keykeg can easily take the psi required, could this be an idea or am i overlooking something
 
3d printed parts are usualy porous it would only hold the pressure if you coted it. With the bag remove is the keg food safe?


Atb aamcle
 
aamcle said:
3d printed parts are usualy porous it would only hold the pressure if you coted it. With the bag remove is the keg food safe?


Atb aamcle
Click to expand...
Im sure they are food grade PET. Amd i would print using PET-G which is food safe and waterproof
 
I use PETG on my 3D printer. Parts are porous. On my pressure barrel cap I printed a part that could be secured to the neck and then used sheet polycarbonate to make the leak proof cap using a silicone rubber gasket to seal the joint.
166C908F-9DD1-4CCC-AEB5-C7AF80A9E4EA.jpeg

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608E494A-6916-4D51-85A4-D02EF805C212.jpeg
 
Buffers brewery said:
I use PETG on my 3D printer. Parts are porous. On my pressure barrel cap I printed a part that could be secured to the neck and then used sheet polycarbonate to make the leak proof cap using a silicone rubber gasket to seal the joint.
View attachment 70421
View attachment 70422
View attachment 70423
Click to expand...
Hi Keith great to see you getting use from your 3D printer, whilst my mods from you are working well i would be very interested in getting some spares, would you happen to have the .stl file for the cap if your willing to share
 
I have started my 3d design. With petg being porous, if its a 100% infill i dont think there will be a problem.
My 1st prototype locks in well and im waiting for a ball lock valve to arrive with a nut on it to connect up and test pressure
 
Are there many 3D printers on this forum. Just wondering about sharing STLs. I've created a beer float for pressure barrels and I'd be happy to share the designs. I assume we would put them on thingyverse or similar and post links. Maybe there should be dedicated thread. Apologies if there already is, I did a quick search and didn't see anything.
 
If you’re just drilling a hole in the top then surely a simple bulkhead fitting would be all that was required. You’d also need to drill a second hole for a PRV. You shouldn’t rely on one single point of failure when it comes to these things.
 

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