|
Post by briank on Jan 28, 2016 19:32:16 GMT -8
Hi Chris, One of the US manufacturers I spoke with here in PA said their ceramic riser sleeves are actually designed to burn away after molten metal is poured into it and recommended against using their product. So just a heads up, there seems to be some differences of terminology here among manufacturers of various products. I posted a related thread here: donkey32.proboards.com/thread/1948/affordable-commercial-vacuum-formed-ceramic
|
|
|
Post by briank on Jan 28, 2016 17:32:56 GMT -8
Thanks Mark.
I had a long exchange with the sales rep and brought him up to speed on what is currently being used and the atmosphere and temps at which it's being used. They do heat risers for other industrial applications and seemed to know exactly what I was talking about.
I'm in no expert (I'm actually a foot doctor by trade). This will be my first build and I have not held one in my hands or experimented with it. But I did a lot of research, including hours exchanging emails with Chinese manufacturers, before settling on this one.
I'm under the impression that because of its light weight and very high insulating properties it should work at 24" without any extra insulation on a 6" j or batch box. They should simply stack on the batch box without the need for external support or extra insulation. If they are going to be stacked one on top of another I think they would need outside support. However they can be manufactured with male and female ends which should make them sturdier but adds a small amount to cost. I don't know if that is advisable.
I'm certainly willing to be corrected on ANY of these points. I'm new to all of this and I really would like the experts here to weigh in and warn us if my research or statements here are incorrect.
I'm building on a very limited budget due to recent health care expenses so I'm trying to find the best option at the cheapest price.
I know there are some awesome products already available and known to many posters here and I want folks to check them out too.
|
|
|
Post by briank on Jan 28, 2016 15:22:07 GMT -8
Thanks Eric. That should work out but I have to make sure we can hit the minimum number of units to order, and then it's a 3-4 week lead time for manufacture.
I think a lot of folks might be reluctant to investigate this further because I'm not known here on Donkey32. But I'm in the medical field in western PA and I'm more than willing to share my identity privately for folks who want to make sure they're not dealing with some random internet robot.
|
|
|
Post by briank on Jan 28, 2016 13:42:03 GMT -8
Hi folks, I know a lot of people on various forums are looking for a source of affordable ceramic risers here in the US. I sent queries to a dozen US manufacturers here in the eastern half of the country over the past month and finally found a factory in Pittsburgh that is willing to produce these in small quantities at very affordable prices. I am am not in the stove industry and don't desire to make a business out of this. Other forums, however, often put together a forum "group buy" to get a good quantity price and meet the minimum purchase quantity on a desired item. I sent the manufacturer specs for its application and current European and American photos of what is currently in use in rocket mass heaters. I want this to be completely open/honest so that no one thinks any profits are being made, so I'll simply post the information I received by email this morning (that way it's open source, anyone can do likewise): Brian, Per your request, here is your price for a Vacuum Formed Riser Sleeve. 2600 F Vacuum Formed Fiber Sleeve 6” ID x 8” OD x 24” Long $ 36.00 each FOB – Pittsburgh, PA Lead time = 3-4 weeks ARO Miminum order of $ 200.00 If you have any questions please let us know. Thank you, Product Sales Manager Temtek Solutions www.temteksolutions.com2 John Street | Mckees Rocks, PA 15136 Tel: 888-265-2608 | Local: 412-771-5533 Cell: 412-334-0618 Please see their website for background on the local manufacturer. Pittsburgh has a lot of heavy industry and this company seems to be well established there. My question is whether anyone here would be interested in a "group buy" on these risers? I would be willing to arrange the group buy, by picking them up from Pittsburgh, packaging them and shipping them individually. Total cost will depend on the cost of the individual riser, packaging costs and actual shipping costs. I'm estimating around $85 total per unit, but I've never done this before, so I may be over or underestimating the cost to package them securely and ship them via the best shipping option. My only "motive" in doing this is to pick up one or two for myself (I'm on an extremely tight budget) and friends to experiment with and make them available to others in the same situation. I'm good at researching but my experimenting days with casting etc are just about over due to health trouble and lack of space for tinkering. Please let me know your thoughts and please give me a heads up if I'm going about this incorrectly here at Donkey32 or missed something important in the tech involved.
|
|
|
Post by briank on Jan 3, 2016 3:59:29 GMT -8
|
|
|
Post by briank on Jan 2, 2016 23:32:15 GMT -8
On further reading here it appears the ceramic blankets with hardener is the better route.
|
|
|
Post by briank on Jan 2, 2016 12:58:57 GMT -8
Hi folks, One of the materials being used among the diy alcohol camping stove makers is carbon felt. It's relatively cheap and has good max temp: "Tillman Welding Blanket - Thermofelt 615 Soft, thick, affordable welding blanket provides protection up to 3000F. 16 oz. Black Thermofelt material is non-flammable, non-melting, non-shrinking and scratch free! No heat transfer takes place between the blanket and the protected surface, making it ideal for auto body and other thin sheet metal surfaces. With a working temperature of 1800F, this blanket is a safety must for the auto body mechanic or the home hobbyist. It is available in 2 sizes, either 3' X 3' or 6' X 6'." A 3'x3' blanket is only $23 at store.cyberweld.com/panfelwelbla.htmlThis stuff is soft and flexible but fairly tough. Does anyone have any experience with it? I wonder if it could be used to line the inside and outside of a 6" riser? I'm just not certain how it could be held in place unless it was used to line clay portions and a short section was expended beyond 1' sections and held in place by the seams, or wrapped around the inner face of vermiculite board? Just thinking out loud...
|
|
|
Post by briank on Jan 1, 2016 15:37:49 GMT -8
Inconel is not only expensive. But i'm a bit dubious it could resist much more than a cooking rocket. This is off topic but... Here's the blurb from their website: "How it Works: Rocket Stove Technology At the heart of these stoves is an advanced, insulated metal combustion chamber built from high-temperature 310 stainless steel and 601 nickel alloys. The “rocket stove” design concentrates heat and mixes combustion gasses to create operating temperatures in excess of 1100 degrees Celsius, which allows the stoves to literally “burn up the smoke.” This produces a fire that is cleaner and more efficient than is possible otherwise. In fact, we believe testing shows our institutional stoves to be unparalleled in performance." They use the 310 for a 60 L stove rocket which they claim burns a little over 2000* F and the Inconel for the 100 L stove which burns hotter than the 60 L.
|
|
|
Post by briank on Dec 31, 2015 22:59:18 GMT -8
Hi guys, new here but I've been lurking for a while. I met Matt down at the Decathalon in DC in the fall of 2013 when I went down to pick up a Beta version of Woodstock's new Ideal Steel hybrid stove while they were there.
I thought Matt had a tremendous amount of guts to go toe to toe with the big boys that showed up at that Woodstove Decathalon. Plus he was just a heck of a nice guy with a very cool concept.
I'll keep lurking abd hopefully learning a bit here.
Happy New Year, Brian K PA, USA
PS: I know "metal is doomed." But one of the manufacturers of institutional rocket cookers uses 310 stainless and Inconel 601 in their rocket portion of the stove. I searched this forum and found no mention of either. The Inconlel 601 has some interesting properties from what I've read as far as resisting spalling and high temp corrosion resistance but it's probably expensive. Has anyone tried using it?
|
|