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-   -   Keggle insulation (http://www.homebrewtalk.com/f51/keggle-insulation-160751/)

squidtpd 02-02-2010 03:04 PM

Keggle insulation
 
I just finished welding up a new keggle mash tun for a rims system. I would like to put some type of insulation on the keggle. What insulation do you use?

Brewmoor 02-02-2010 03:15 PM

I used reflectix on my kegs. I did two layers on my mash tun and just a single layer on my HLT and BK. Here is a link to what I used.

http://www.lowes.com/pd_13357-56291-BP24025_4294858104_4294937087?productId=3011904&pl =1&currentURL=/pl_Foil%2BInsulation_4294858104_4294937087_

Bobby_M 02-02-2010 03:15 PM

Do you intend to put a flame under the tun? http://www.homebrewtalk.com/f51/direct-fire-mlt-insulation-project-154652/

If not, a lot of people use Reflectix which you can find in Lowes. It's basically bubble wrap with foil on both sides.

squidtpd 02-02-2010 03:44 PM

No heat. My rims uses a low density heating element. I'll check slowes. Thx

lamarguy 02-02-2010 03:54 PM

If you're seeking a higher R factor and higher temperature stability (220+), you may consider purchasing closed cell foam insulation. I believe Reflectix is only rated to 170F.

Quote:

Wrap this foam insulation around ducts and large diameter pipes—it's moisture resistant and extremely flexible and soft. Insulation is made of closed-cell elastomeric Buna-N/PVC foam. Cut with a knife. Meets ASTM E84 25/50 for flame and smoke. Size is 36" x 48", unless noted.
http://www.mcmaster.com/catalog/116/...349k611p1l.gif

DeafSmith 02-02-2010 04:17 PM

Even the closed cell foam is only rated to 220* F. What if you used fiberglass, such as for duct insulation which is lined with alum. foil on one side - cut it to size, then spray it lightly with high-temp. (1200*) paint to hold the fiberglass in place, then totally wrap this in heavy duty aluminum foil and seal up with aluminum HVAC tape? Wouldn't that be able to handle higher temperatures? I'd think that the paint to stick down the fiberglass, plus totally encasing it in alum foil, would pretty much eliminate the chance of getting any fiberglass in your brew?

lamarguy 02-02-2010 04:31 PM

Quote:

Originally Posted by DeafSmith (Post 1854985)
Even the closed cell foam is only rated to 220* F.

Correct, we're not talking about an open flame. ;)

CodeRage 02-02-2010 04:35 PM

lamarguy, did you get the adhesive backed stuff? If so, how well does the glue hold up? I don't have any problems with the reflectix other than it got brushed with a torch.... So if I replace it I would like something with a higher R factor for better efficiency.. But the reflectix does work much better than nothing. I think 2 layers with no air gap is rated at R5.

DeafSmith 02-02-2010 04:41 PM

Quote:

Originally Posted by lamarguy (Post 1855032)
Correct, we're not talking about an open flame. ;)

Even without an open flame, I can see the temp. around the bottom getting higher than 220* F. I do my boils on my electric stove and I'm looking for a way to insulate my brew pot (also going to build a heat stick). I know that the air coming up around the bottom of the pot with the burner on high is more than 220*, which is why I'm looking for a high temp insulation.

Bobby_M 02-02-2010 04:45 PM

Well yeah, if your tun is close to your boil kettle, that's a factor. If you can get away with closed cell foam, that's likely the most user friendly and durable insulation.


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