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Post by Robert on Dec 12, 2013 13:51:43 GMT -8
Hello. This is a question mainly for our rocket guru Peter. I have seen this amazing heat riser on the article in MHA. It says that you have used a vacuum formed refractory ceramic fibers for the riser. Can you please say something more about this, how strong is the stuff, where to find it, and how much it costs etc... it seems to be much better than the squared vermiculite board, and again much better than the refractory cement for the riser   |
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Post by peterberg on Dec 13, 2013 11:45:05 GMT -8
This a product made of superwool and a binder. It's vacuum formed, this particular piece is made in Belgium by a refractory vendor. Maximum length is 42 cm, it's quite soft but firm and it is able to withstand 1400 Celsius. Ideal for a riser, very low mass and heavily insulating. The inside of the duct is a bit softer now but more than 5 mm inside the material it's still the same as before.
I honestly don't know where to find it around your part of the world, but products like this are made almost everywhere or so it seams. Try "ceramic fibre products" or a similar Polish phrase in Google?
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Post by Robert on Dec 13, 2013 19:51:55 GMT -8
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Post by peterberg on Dec 14, 2013 1:09:28 GMT -8
Some of the latest experiments are done on this riser. The last time I had a look was during Boris' visit, it doesn't look anything different compared to 3 months ago.
But you are going to Belgium in Januari to meet Joris Pouls. Ask him, he's the first one who used this material for a riser. Moreover, the riser I am using now has been provided by Joris. So he's the one to know more about life expectancy and stuff. This Promattop material could be the right one, it's made of ceramic fibres and can be delivered in three different qualities.
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Post by Robert on Dec 14, 2013 8:35:34 GMT -8
Yes i will ask him. Thank you so much for contacting me with him I am so happy and excited |
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Post by matthewwalker on Dec 14, 2013 11:01:53 GMT -8
Robert, I've been using a similar type riser for about a year now in various heaters. They are holding up great, I've had no issues at all.
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Post by Robert on Dec 14, 2013 14:35:46 GMT -8
that sounds promising... i would be happy if they could survive 25 years... since i want to build a bell kind of a stove from the firebricks, and it have to last at least so long... but this we will be sure most likely after a while... i will try also to contact a producer and ask him how they will react with the direct flame contact.
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morticcio
Full Member
"The problem with internet quotes is that you can't always depend on their accuracy" - Aristotle
Posts: 371
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Post by morticcio on Dec 14, 2013 14:55:06 GMT -8
Matt, you mentioned riser sleeves in another thread. Is this what you are referring to? I've found a supplier here in the UK that does them in 152mm (6") inside diameter x 150mm (6") tall x 8mm wall thickness. Are yours a similar size?
Reasonable @ £2.50 each, but trouble is they come in boxes of 27.
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Post by matthewwalker on Dec 14, 2013 15:02:18 GMT -8
That's a pretty thin wall thickness. I have used some inexpensive ones that I think are similar. The ones I found here are 1/2" wall thickness, and come in 12" lengths. That's what I'm using on my outdoor system, and yes, they work fine and hold up fine. The risers I prefer are the same material in 2" wall thickness, 24" lengths. These are much more expensive, but I prefer them as they are much more robust and provide a lot more insulation. I've found a few suppliers who will do full custom sizes and lengths, but of course that gets real expensive quickly. One cool thing about those thin ones, they make great positive molds for your riser castings, and particularly the lower riser section that's in the core base. You leave the material in there and you have a highly insulated sleeve inside. It's been my favorite core casting trick for a while now.
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Post by pyrophile on Dec 22, 2013 15:07:40 GMT -8
Hi, I did not find Promaform or this kind of product (vacuum formed refractory ceramic fibers) in France. Google did not help.
Does somebody know how to find some?
Thanks
Benoit
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Post by doggy1969bc on Dec 22, 2013 15:26:29 GMT -8
try Roberts link ,klik home,then interntional ,then klik europ on the map, then FR
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Post by satamax on Dec 22, 2013 22:45:07 GMT -8
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Post by Robert on Dec 23, 2013 7:29:00 GMT -8
I have been speaking with one of the guys who said that they were trying this stuff in big stoves. He said that after 2-3 years of heavy use they will die. If you could confirm and ask the supplier in France, and ask him if they can go with direct flame, and how long they should live it would be nice...
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Post by pyrophile on Dec 24, 2013 11:22:43 GMT -8
I asked to Prosiref, the link given by satamax, price and longivity in our conditions of burning. Answer coming soon.
Benoit
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Post by pyrophile on Dec 24, 2013 11:28:18 GMT -8
But shipping costs could be high. How to avoid them? Satamax, an idea?
Benoit, King in procrastination (sorry Satamax!)
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