Ss Brewing Technologies Giveaway!

Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Insulating my Mash Tun
Reply
 
LinkBack Thread Tools
Old 04-28-2014, 02:38 PM   #1
dmcmillen
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2010
Location: Hattiesburg, MS
Posts: 45
Default Insulating my Mash Tun

My setup is a single tier, 2 pump Brutus style system with HLT, Mash and Boil keggles with 3 wok burners (2x175,000 btu and 1x150,000 btu).

I've been trying to find a good way to insulate my mash tun in order to maintain my mash temp and not have to apply heat as often. I have tried reflectix and am now using armaflex. Armaflex is a great insulator and will maintain temp without having to apply any heat once I hit mash temp. The problem is when I have to apply heat to the mash tun. I have taped off the bottom of the armaflex (or reflectix when I used it) with silver tape (and the vent holes) and put sheet metal on the stand around the keggle, but when I apply even a small flame, hot air flows around the outside of the keggle and up the sides deforming the armaflex (or reflectix).

Is there a another material that would be a good insulator AND be impervious to the heat? Thanks for the suggestions folks!

David

__________________
dmcmillen is offline
 
Reply With Quote Quick reply to this message
Old 04-30-2014, 02:13 AM   #2
acidrain
Feedback Score: 3 reviews
Recipes 
 
Join Date: Jul 2012
Location: Central Cascadia, Washington
Posts: 1,585
Liked 123 Times on 107 Posts
Likes Given: 25

Default

Rock wool or mineral wool insulation is completely fire proof, and water proof.
I wrapped mine in 1" rock wool, then wrapped that in SS sheetmetal. Works pretty good, but I still use HERMS to maintain the temp.
Keggles are not good at retaining heat.

__________________

Keg #1: RHESB 6.2
Keg #2: Cascadian Stout
Keg #3: BMC West
Fermenter #1 Bourbon/Oak Vanilla Porter
Bottled: Mjolnir Mead, Lazy Daze Hefe, The Bollocks ESB, Dark Matter stout.

acidrain is offline
 
Reply With Quote Quick reply to this message
Old 04-30-2014, 01:27 PM   #3
dmcmillen
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2010
Location: Hattiesburg, MS
Posts: 45
Default

Thanks acidrain. After I posted this I found a long thread that Bobby M. started a few years ago where he encapsulated mineral wool in sheet metal and sealed it, much like your system. I would think that would be a pretty good project, especially with 2 valves and a thermometer. I'll bet your ss was fun to work with! He doesn't remove his. Do you know what the R value of the rock wool/mineral wool is?

In that post, Bobby talks about either encapsulating in sheet metal or a welding blanket. I think I have a thick piece of fiberglass blanket insulation around somewhere, so I could pick up a welding blanket (Harbor Freight has em for $20). I'm assuming that the fiberglass blanket won't burn.

Anyway, appreciate any other suggestions/ideas.

__________________
dmcmillen is offline
 
Reply With Quote Quick reply to this message
Old 05-01-2014, 04:27 AM   #4
acidrain
Feedback Score: 3 reviews
Recipes 
 
Join Date: Jul 2012
Location: Central Cascadia, Washington
Posts: 1,585
Liked 123 Times on 107 Posts
Likes Given: 25

Default

The fiberglass blanket won't burn, but it does scorch and turn black a bit. That is where I started... I was trying to wrap fiberglass insulation with a fire proof blanket... it didn't work.
Not sure about the r value of the rock wool, and I didn't seal the ss to the keggle. The flame will actually go up between the keggle and the outer shell, but no problem. It doesn't hurt a thing.

__________________

Keg #1: RHESB 6.2
Keg #2: Cascadian Stout
Keg #3: BMC West
Fermenter #1 Bourbon/Oak Vanilla Porter
Bottled: Mjolnir Mead, Lazy Daze Hefe, The Bollocks ESB, Dark Matter stout.

acidrain is offline
 
Reply With Quote Quick reply to this message
Old 05-01-2014, 02:35 PM   #5
dmcmillen
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2010
Location: Hattiesburg, MS
Posts: 45
Default

Did you wrap the fiberglass blanket in a welder's blanket? When you said it didn't work, did you mean it didn't insulate adequately or it was hard to pull tight around the keggle or what?

I found my fiberglass blanket. Forgot how much I hate working with fiberglass. Geez, I'm still itching.

Do you have some pics of your current setup? Thanks for the info!

__________________
dmcmillen is offline
 
Reply With Quote Quick reply to this message
Old 05-01-2014, 06:26 PM   #6
acidrain
Feedback Score: 3 reviews
Recipes 
 
Join Date: Jul 2012
Location: Central Cascadia, Washington
Posts: 1,585
Liked 123 Times on 107 Posts
Likes Given: 25

Default

I tried to cut the fiberglass blanket. It was one of the tan ones you can get at Harbor Freight.
Once the hems were cut, it just unraveled. I tried to sew hems in it, but it just pulled and unraveled. It was a nightmare.
I don't have current pics, but I will get some when I get home.

__________________

Keg #1: RHESB 6.2
Keg #2: Cascadian Stout
Keg #3: BMC West
Fermenter #1 Bourbon/Oak Vanilla Porter
Bottled: Mjolnir Mead, Lazy Daze Hefe, The Bollocks ESB, Dark Matter stout.

acidrain is offline
 
Reply With Quote Quick reply to this message
Old 05-01-2014, 07:35 PM   #7
dmcmillen
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2010
Location: Hattiesburg, MS
Posts: 45
Default

Hmmm. I think I have a different form of fiberglass than you had. I'm attaching a pic. It's 1" thick. I'm wondering if I can cut/sew/tape a welding blanket?

img_2621.jpg  
__________________
dmcmillen is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Insulating a stainless mash tun. Opinions? beermanpimp DIY Projects 5 01-26-2014 04:46 PM
Insulating Sanke keg mash tun BaldApe Equipment/Sanitation 11 09-29-2012 01:37 AM
insulating kettle mash tun HItransplant Equipment/Sanitation 11 04-29-2011 05:37 PM
Insulating our mash tun MikeRLynch Home Brewing Photo Forum 5 01-25-2010 12:58 AM
insulating mash tun kcmcf Equipment/Sanitation 1 04-17-2008 06:08 AM