The beer fermenter project is finally ready for its first batch of beer. I bought a soft silicone strip from McMaster and cut a scarf joint in it. The diameter of the finished ring matches the lid on the fermenter.
I did some testing and verified that standard silicone adhesive would bond the red silicone rubber strip very well. I am pretty sure that if tested to destruction, the glue joint would break before the rubber itself would, but it still seems tough enough for this application.
I also welded my stainless cooling coil into the lid.
I made some Delrin clamps to keep the lid held tightly onto the tank. The silicone rubber is very soft which helps easily make a seal with minimal clamping pressure. I clamped it all up, shut both valves, and sucked some air out with my lungs. I could feel the vessel holding the vacuum that I created, so I assume the setup is essentially air-tight.
OK, so now it's time to brew some beer! Any recipe suggestions?