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Old February 17th, 2016, 07:40 PM
evl evl is offline
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Default Steam hood fabrication in progress

Working on some hoods for the evaporator, it is a 6 16.
Last year we went without a hood, this year we are in a new shack, so we thought a hood would be a nice addition.
Today I started on a stainless preheater, I'll try to get some pics of that up tomorrow.
Posting from my phone, sorry for the upside down pics
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Steam hood fabrication in progress-20160208_005632.jpg   Steam hood fabrication in progress-20160212_203028.jpg   Steam hood fabrication in progress-20160214_200135.jpg   Steam hood fabrication in progress-20160214_201533.jpg  
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Old February 18th, 2016, 07:34 AM
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easy fix, turn your monitor upside down or stand on your head.
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Old February 18th, 2016, 09:21 AM
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Nice fab work. Man I hope you didnt have to build that frame work just to do the hood!
That's going to be a nice addition to the evaporator. What is the size? looks like 3 or 4 x 6 or 7?
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Old February 18th, 2016, 03:09 PM
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Thanks Sugarmaker. That is a rotisserie for hanging a car body on while doing a restoration. Just thought it would be nice to use it so I can access the bottom side a little easier.
These hoods are going on a 6 x 16 evaporator. Due to the larger size, I am making 2 separate hoods instead of one long beast. I'm planning on a 24 inch diameter steam stack for each hood. Any suggestions would be great. I don't really want to put 2 smaller stacks on the 10 foot hood, would like to stick with one if I can.

Here is a pic of the preheater. Tubes are 2 Inch diameter and 112 inches long. Old dairy barn pipeline.
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Old February 19th, 2016, 05:42 PM
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That is a big evaporator! The two hoods should work better for handling too.
The preheater system should help 5 to 10%, by getting the cold sap up near 190 F.
Add a vent at the upper end too.
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Chris
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Old February 24th, 2016, 05:53 PM
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I finished up the preheater, only thing left is to weld on some brackets to hang it in the hood. I have a port on the top tube to vent steam from the preheater. The inlet is on the bottom, and outlet is the upper tube. I have a 1/4 inch port welded to the bottom of each end so that this can be drained to prevent any damage from freezing, and also to help with cleaning and flushing. This thing should hold about 15 gallons total. I can't wait to see how well this thing heats.
Today I started working on the doors for the hood. Tomorrow I have to pick up the stainless for the stacks. I had it sheared to size and ran through a roller at a fabrication shop. We should be looking pretty good by the end of the weekend.
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Old February 25th, 2016, 06:30 PM
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Great idea for the drain in the bottom too.
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Chris
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Old February 25th, 2016, 08:24 PM
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Looking really good, but my neck was getting a cramp in it, so I flipped your shop. :)
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Steam hood fabrication in progress-20160208_005632.jpg   Steam hood fabrication in progress-20160212_203028.jpg   Steam hood fabrication in progress-20160214_200135.jpg   Steam hood fabrication in progress-20160214_201533.jpg   Steam hood fabrication in progress-20160220_143808.jpg  

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Old February 26th, 2016, 02:23 PM
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Thanks for the help, Maxj.

I have the doors made, and hinges welded on. I need to cut holes in the hood and weld them on yet. Here is a pic of them before I finished welding the hinges. Also a pic of the stacks that I picked up after they were rolled. I have a bead roller I might use to put some strength and body in them, I'm just worried about distorting them too much. I'll know how it turns out in a little while.

And I might have figured out why my pics were upside down. Just another curse of being a south paw!
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Steam hood fabrication in progress-20160226_021008.jpg   Steam hood fabrication in progress-20160226_021018.jpg   Steam hood fabrication in progress-20160226_021103.jpg  
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Old February 28th, 2016, 06:54 PM
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Got the first section of stack fitted on the hood. I need more ceiling in the shop! This section sits on the pan that is mounted to the hood from the bottom side. This will catch all the condensate from the stack and direct it down to the perimeter of the hood.
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Steam hood fabrication in progress-20160227_181114.jpg   Steam hood fabrication in progress-20160227_181130.jpg   Steam hood fabrication in progress-20160227_181311.jpg  
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