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All,
I'm installing an Italian modular oven in a new outdoor kitchen oven in the western part of Toronto. It's definitely not from Forno Bravo. The casting can only be called more than a tad on the rough side, so much so that I'll be parging the interior with a product used for such a purpose in large industrial furnaces. Don't have the product name handy (it's at the site), but I'll supply it if anyone's interested. The crate contained a four piece floor, a four piece dome and a bit of a landing, much like what FB supplies. What it DID NOT come with were instructions or a vent of any sort.
As a result, yesterday I cast a vent using Kastite (max temp 2600 F) from Chicago Firebrick. The form work was a bit tricky, because I had to make a form within a form. Releasing the angled form was hairy, but it finally came out. To get the round hole for the anchor plate, I coated a 12 inch length of black stove pipe with oil and left it in place overnight. The angle on the smaller form was 15 degrees, which I used to help the draw. The total casting is 6 inches thick, with three inches for the top portion and three inches for the angled portion.
The exterior dimensions of the main form were 16x19x6 inches. In total, I used 75 lbs of Katitite. The manufacturer specifies 8 to 9 pounds of water to every 50 lbs of Kastite (it comes in 50 lb bags). At that hydration it's a sloppy mix, but it sets firm within about two hours, then begins to heat up quit a bit.
I'm keeping the casting wet right now and covering it with a tarp. After it sets completely, I'll bake it in my bread oven a few times, with cooling cycles in between.
Attached are pics of the site and the vent.
Jim
I'm installing an Italian modular oven in a new outdoor kitchen oven in the western part of Toronto. It's definitely not from Forno Bravo. The casting can only be called more than a tad on the rough side, so much so that I'll be parging the interior with a product used for such a purpose in large industrial furnaces. Don't have the product name handy (it's at the site), but I'll supply it if anyone's interested. The crate contained a four piece floor, a four piece dome and a bit of a landing, much like what FB supplies. What it DID NOT come with were instructions or a vent of any sort.
As a result, yesterday I cast a vent using Kastite (max temp 2600 F) from Chicago Firebrick. The form work was a bit tricky, because I had to make a form within a form. Releasing the angled form was hairy, but it finally came out. To get the round hole for the anchor plate, I coated a 12 inch length of black stove pipe with oil and left it in place overnight. The angle on the smaller form was 15 degrees, which I used to help the draw. The total casting is 6 inches thick, with three inches for the top portion and three inches for the angled portion.
The exterior dimensions of the main form were 16x19x6 inches. In total, I used 75 lbs of Katitite. The manufacturer specifies 8 to 9 pounds of water to every 50 lbs of Kastite (it comes in 50 lb bags). At that hydration it's a sloppy mix, but it sets firm within about two hours, then begins to heat up quit a bit.
I'm keeping the casting wet right now and covering it with a tarp. After it sets completely, I'll bake it in my bread oven a few times, with cooling cycles in between.
Attached are pics of the site and the vent.
Jim
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