Boiler Insulation

Boiler, burner and boiler modification talk.

Boiler Insulation

Postby Horn_Bee » Wed Jul 27, 2016 11:56 am

Hi guys,

I’m trying to increase the efficiency of my still, and my thoughts have turned to boiler insulation. At present I have my boiler wrapped in a beach towel folded in thirds which seems to have done an okay job at keeping the boilers heat in, but I am sure I can do better. At the moment I am looking at something like http://www.clarkrubber.com.au/formshield-10mm-wide-black.html, either one or two layers thick (depending on performance). I figure I can make cut-outs for element ports and the drain in order to get a snug fit, then stitch in some Velcro straps to keep it attached to the boiler.

What does everyone else do for insulation? Does this look feasible, or am I off the mark? Is there something tried and tested that I should use instead? Is it worth insulating the boiler at all?

Any thoughts would be helpful!

Mick
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Re: Boiler Insulation

Postby wynnum1 » Wed Jul 27, 2016 12:22 pm

Have you looked at using cardboard under the rubber some rubber does not like hot temperate and it would cut back the temperature and free.
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Re: Boiler Insulation

Postby coffe addict » Wed Jul 27, 2016 1:01 pm

I picked up a few woolen blankets cheap $5 each they are washable fire retardant and excellent insulation.

The dunder stay hot for days. Also I can do runs split over two days with only 15 to 20 mins to get back on the boil.
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Re: Boiler Insulation

Postby rumdidlydum » Wed Jul 27, 2016 1:13 pm

That's perfect stuff in the link. Definitely get something that wont deteriorate if you get it wet, you dont want to have remove all the insulation and replace it after a few cleans. :D
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Re: Boiler Insulation

Postby hillzabilly » Wed Jul 27, 2016 6:01 pm

rumdidlydum wrote:That's perfect stuff in the link. Definitely get something that wont deteriorate if you get it wet, you dont want to have remove all the insulation and replace it after a few cleans. :D

:text-+1: I would not go to that much trouble and expence for ya 30lt boiler ,would be fine for the 50lt milk can ya have on order tho.cheers hillzabilly ;-)
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Re: Boiler Insulation

Postby Horn_Bee » Wed Jul 27, 2016 6:06 pm

hillzabilly wrote: :text-+1: I would not go to that much trouble and expence for ya 30lt boiler ,would be fine for the 50lt milk can ya have on order tho.cheers hillzabilly ;-)


Yeah, that's the plan. I think the beach towel will be just fine for the 30L I'm using at the moment until the milk can arrives :twisted:

Mick
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Re: Boiler Insulation

Postby hillzabilly » Wed Jul 27, 2016 6:11 pm

Reminds me of when I used to use an old boating life jacket ta insulate my 30lt boiler came with straps an all :laughing-rolling: cheers hillzabilly :handgestures-thumbupleft:
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Re: Boiler Insulation

Postby coffe addict » Wed Jul 27, 2016 6:23 pm

Haha haha that's a good idea hillzabilly I have heaps from when I lived on a boat. Slightly flammable but so are most things under the house :laughing-rolling:
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Re: Boiler Insulation

Postby Aussiedownunder01 » Wed Jul 27, 2016 6:55 pm

On my boiler I just used insol wool then foil paper all lined with timber slats
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Re: Boiler Insulation

Postby coffe addict » Wed Jul 27, 2016 7:00 pm

Hey aussie what boiler is it and how did you do the strapping?
I've been known to lust over your boiler :romance-kisscheek:
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Re: Boiler Insulation

Postby toil » Wed Jul 27, 2016 7:12 pm

I use insulation from clarke rubber. It is designed for under the car bonnet. I have in on both the 3" reflux still and the keg boiler. Seems to work really well. I couldn't find it on the web site though.
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Re: Boiler Insulation

Postby TheMechwarrior » Wed Jul 27, 2016 9:25 pm

There are some purists out there that would argue against the use of any insulation on a still.
Arguing that the art of making whisky is all about embracing the inefficiencies of the pot still design. One of those inefficiencies is the massive heat loss at the boiler, this in turn prolonging the distillation process and increasing the conversion of yummy esters.

To achieve a similar result with a more efficient boiler design (stainless and insulated) would require you to cut back on the power and extend your distillation times.
Just some food for thought.
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Re: Boiler Insulation

Postby Aussiedownunder01 » Thu Jul 28, 2016 6:18 am

coffe addict wrote:Hey aussie what boiler is it and how did you do the strapping?
I've been known to lust over your boiler :romance-kisscheek:

Strapping is easy ockey straps first tuck your timber in roughly 1 st photo
When all the timber is in place start tightening it with rachet straps and adjust timbers
I had to remove 2 to let it go tight enough
Tighten it to the max then put the brass bands on
I just used 2 lengths of ockey strap put in your joining screws release straps and tap timbers into place
Still to do is the other 150 screws 3 in each stick and varnish
Hope this helps
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Re: Boiler Insulation

Postby Horn_Bee » Thu Jul 28, 2016 7:39 am

Aussiedownunder01 wrote:On my boiler I just used insol wool then foil paper all lined with timber slats


Aussie, I must admit that you have yourself one sexy looking boiler! :clap:

Mick
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T500 reflux condenser
Alembic pot condenser
30L electric boiler

Re: Boiler Insulation

Postby wynnum1 » Thu Jul 28, 2016 9:57 am

TheMechwarrior wrote:There are some purists out there that would argue against the use of any insulation on a still.
Arguing that the art of making whisky is all about embracing the inefficiencies of the pot still design. One of those inefficiencies is the massive heat loss at the boiler, this in turn prolonging the distillation process and increasing the conversion of yummy esters.

To achieve a similar result with a more efficient boiler design (stainless and insulated) would require you to cut back on the power and extend your distillation times.
Just some food for thought.


The bigger the boiler the less heat lost surface area to volume ratio.
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Re: Boiler Insulation

Postby Kenster » Thu Jul 28, 2016 8:18 pm

Aussie, that is some serious insulation...nothin aint gettin out.
Nice work.
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Re: Boiler Insulation

Postby TheMechwarrior » Thu Jul 28, 2016 9:37 pm

Damn fine craftsmanship :clap:
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Re: Boiler Insulation

Postby coffe addict » Thu Jul 28, 2016 9:48 pm

Doesn't seem too hard! Looks amazing. With only three screws it's easy to take apart for annual cleaning, plus it'll save you installing the other 150 :happy-partydance:

I think my new found 80L keg deserves a similar treatment!
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Re: Boiler Insulation

Postby Aussiedownunder01 » Fri Jul 29, 2016 7:50 am

Got 1/2 the screws in
Theres only 9 screws to remove the cladding if needed in one piece :handgestures-thumbupleft:
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Re: Boiler Insulation

Postby shortybronx88 » Sun Apr 09, 2017 10:59 am

Now this is a thing of beauty!
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