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Old January 24th, 2017, 10:00 AM
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Default Homemade drop pan

I'm in the process of building an evaporator yes pictures are coming soon. I'm looking to make a set of pans. I'm planning on a tube drop flue style similar to masons style pans. Im planning to have a local shop weld then up any advice? Anything I need to worry about? Any finishing that I need to do? I was reading through the forum last night and got nervous with reading about finishing stainless pans to make them food safe. Am I thinking this right. Thanks in advance.
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Old January 26th, 2017, 07:35 AM
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Gratefulmaple welcome to the site. Now as far as a drop tube pan is concerned the pan it self is made of stainless. Then they take a piece of copper pipe that has been capped off on one end and flared out on the other. They drill out the hole in the bottom of the stainless pan flare it a little and then solder the joint together. And this process is repeated over and over again because the more drop tubes the better. That is the back pan or what is most often referenced as the flue pan. Then you have a smaller finishing pan in the front that finishes the sap into syrup. And it is also where syrup is drawn off. All stainless is food grade that I am aware off. Good luck this season and don't forget to post some pictures.
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Last edited by Radnagel; January 26th, 2017 at 07:48 AM.
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Old January 26th, 2017, 08:17 AM
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Quote:
Originally Posted by Radnagel View Post
Gratefulmaple welcome to the site. Now as far as a drop tube pan is concerned the pan it self is made of stainless. Then they take a piece of copper pipe that has been capped off on one end and flared out on the other. They drill out the hole in the bottom of the stainless pan flare it a little and then solder the joint together. And this process is repeated over and over again because the more drop tubes the better. That is the back pan or what is most often referenced as the flue pan. Then you have a smaller finishing pan in the front that finishes the sap into syrup. And it is also where syrup is drawn off. All stainless is food grade that I am aware off. Good luck this season and don't forget to post some pictures.
Not how Mason pans are made. Tubes go lengthwise the pan and flue gases go though the pipes.
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Old January 26th, 2017, 08:26 AM
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Gotcha never seen a mason pan figured it was like a normal drop tube pan. What would be the advantage of this style pan?
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Little sugar house has a 28x66 flat pan.
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Two Yamaha Grizzly atv's.
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Old January 26th, 2017, 08:36 AM
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I made a drop tube pan and it boils like crazy! Make sure shop uses silver solder like stay bright by harris. It is 95% silver and is very expensive. also when you get it back for the shop I recommend that you wash with baking soda and water and heat. this will neutralize any flux residue that has accumulated in the pan. then rinse with a lot of clean water then repeat. Make sure the sides are tall because the tubes will shoot sap 12 to 18 inches high. Make tubes no less than 3/4 inch diamiter. 1 inch or more is recomended. when boiling make sure all solder is under sap or the heat will melt the joints.

Just a ?
If a shop is making it why not make a drop flue pan instead?
Pics please....
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Old January 26th, 2017, 10:30 AM
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I believe the OP is considering a fire tube pan like mason's, with horizontal tubes in a drop section that the exhaust gasses flow through much like an steam locomotive boiler. I have heard they boil great, and was once considering making one myself. Someone on the Trader mentioned that a stainless pan with copper tubes suffers from differential thermal expansion, which makes since and should be avoided.

This is not a problem with the vertical drop tubes since they are short and unconstrained on the bottom end.
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Old January 26th, 2017, 10:41 AM
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This is my Mason back pan from my 2x6. I have never seen a flue pan boil like this would.
Attached Thumbnails
Homemade drop pan-img_0320.jpg  
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Old January 26th, 2017, 11:10 AM
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Wow that's interesting I would have thought that it would have been to restricted that it would choke the fire out. Is the arch blanket tight to the bottom of the pan or is there a space. So what did you figure was your gph rate with this rig?
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Little sugar house has a 28x66 flat pan.
Big Sugar house has a 3x8 pan with dividers and auf.
Two Yamaha Grizzly atv's.
All taps on drop tubes into buckets.
Smoky Lake Filter/Finisher/Filter.
Smoky Lake Crescendo Auto Draw.
Brother-in-law for a partner in crime.
Wife and 4 kids.
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Old January 26th, 2017, 12:27 PM
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Yes your correct I used the wrong terminology. I've thought about using Mason's style but I'm not sure if it would work with aof. Ive read somewhere and I can't find it now that someone said that it won't work with aof. I'm just trying to make as efficient as I can.

Last edited by Gratefulmaple; January 26th, 2017 at 12:34 PM. Reason: Mis wrote reply
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Old January 26th, 2017, 01:08 PM
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No reason it wouldnt work with aof.
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