Hopper Distortion

Hopper Distortion

PostBy: joeq On: Sun Nov 03, 2013 8:16 pm

Looking to modify my Surdiac hopper in the future. As you can see, mine is a little ..."rough" around the edges, and guess this is common for this type of stove.
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Because the consensus is a larger coal bed will burn longer, would it be beneficial if I were to take my mason blade on my circular saw and cut off the choked down section, or the distorted bottom part of this hopper, which would allow a taller bed of burning coals, even if it reduced the hopper capacity. I've been reading the threads on using larger coal, and nut coal just plain clogs my hopper. If I increased the bottom opening by cutting the bad section off, I wonder if I could increase my burn times by running nut, rather than pea. Anyone?
joeq
 
Hand Fed Coal Stove: Surdiac Gotha 513
Stove/Furnace Make: Oil fired
Stove/Furnace Model: Thermopride

Re: Hopper Distortion

PostBy: warminmn On: Sun Nov 03, 2013 9:35 pm

Does the hopper drop in thru the top? Mine does and I put a couple rows of rope gasket (used stuff I replace from doors) under the upper lip of my hopper and tie a knot in it, which probably raises it an inch or so. After I slice and move the fresh coal around with slicer my coal is just a little higher than the grate surround. I have never had my hopper plug from nut but I'm sure it could if conditions were right. The inside of my hopper is about 6" X 12". I cant measure my inside depth cuz I have a wood fire going in it. My hopper does show evidence of being overheated so I must have gotten it a little too hot last year. Or maybe its cuz I raised it. I cant recommend doing it, but thats what I did.

I dont know about cutting it.
warminmn
 
Hand Fed Coal Stove: Chubby Junior, Efel Nestor Martin
Coal Size/Type: nut and stove anthracite. Soft coal
Other Heating: wood

Re: Hopper Distortion

PostBy: joeq On: Sun Nov 03, 2013 10:02 pm

Thanx for the input. My hopper won't go thru the top, but it could be shimmed up a little more like you did to yours, if I thought it would help. People in the past have had success mixing nut with pea, but the 2 times I tried it, both times clogged the mouth of the distorted hopper opening, preventing the fresh coal from dropping. That's why I might experiment next season by cutting off the bottom of mine. We'll see. it's difficult to keep the bottoms of these things from overheating because of the nature of the beast. They say we need to keep a full hoper to absorb all the heat, but it's tough to do when 1st lighting the stove, and when sleeping at nite, the coal drops to feed the fire. It's like a win/lose proposition.
Last edited by joeq on Mon Nov 04, 2013 12:08 am, edited 1 time in total.
joeq
 
Hand Fed Coal Stove: Surdiac Gotha 513
Stove/Furnace Make: Oil fired
Stove/Furnace Model: Thermopride

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Re: Hopper Distortion

PostBy: 2001Sierra On: Sun Nov 03, 2013 10:15 pm

My older Buderus 3115 had a similar design. The front of the hopper was removeable. It over many years showed signs of wear and minor distortion. I think it was the nature of the beast. These stoves where only in the 45000 to 60000 BTU rating so us Americans ran them a little harder than designed because our homes a larger than our European counterparts where these stoves where designed. My opinion, even though the Buderus served us well for over 27 years. My Keystoker 90 just cruises.
2001Sierra
 
Hot Air Coal Stoker Stove: Keystoker 90 Chimney vent
Coal Size/Type: Rice
Other Heating: Buderus Oil Boiler 3115-34
Stove/Furnace Model: Keystoker 90 Chimney Vent

Re: Hopper Distortion

PostBy: franco b On: Sun Nov 03, 2013 10:26 pm

I see Surdiac stoves all the time very cheap, so you can either get the bigger one and run it at a lower output or do as you say and shorten the hopper to get a deeper coal bed. you will also have to line above the fire pot with refractory and get a higher banking bar in front to contain the higher bed of coal.
franco b
 
Hand Fed Coal Stove: V ermont Castings 2310, Franco Belge 262
Baseburners & Antiques: Glenwood Modern Oak 114
Coal Size/Type: nut and pea

Re: Hopper Distortion

PostBy: freetown fred On: Sun Nov 03, 2013 10:34 pm

Yep, what franco b says--I'd make my cut right at the top of that lip--ya even got nice straight lines to follow :)
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: Hopper Distortion

PostBy: joeq On: Mon Nov 04, 2013 12:15 am

freetown fred wrote:I'd make my cut right at the top of that lip--ya even got nice straight lines to follow :)


If nothing more, it'ld make removal and installation of that hopper a little easier. When they designed the opening, they sure were stingy with their clearances. I don't think you could pass a piece of tin foil between them. I invent new 4 letter words, evertime I have to perform that task. :mad:
joeq
 
Hand Fed Coal Stove: Surdiac Gotha 513
Stove/Furnace Make: Oil fired
Stove/Furnace Model: Thermopride

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