High temp silicone

High temp silicone

PostBy: Grinder On: Sat Dec 15, 2007 9:03 am

Is 500 degree silicone sufficient to use on the combustion motor flange?
Grinder
 
Stove/Furnace Make: KeyStoker
Stove/Furnace Model: 90

Re: High temp silicone

PostBy: spc On: Sat Dec 15, 2007 9:09 am

Use flat fiberglass gasket rope.
spc
 
Stove/Furnace Make: Leisure Line
Stove/Furnace Model: Pioneer

Re: High temp silicone

PostBy: Grinder On: Sat Dec 15, 2007 9:31 am

Rope gasket would be too thick. Half of the flange fits into a housing that's welded to the back of the stove. The housing (I'm sure there's a better word to describe it) holds one side of the flange tight to the stove, the other side is bolted. There is just enough play that the combustion motor starts rattling but, if there wasn't any play, you wouldn't be able to remove the combustion fan assembly.

So, I'm looking at either high temp silicone or furnace cement. The silicone would dampen it the best but, I'm not sure if 500 degree silicone would hold up on the back of the stove.
Grinder
 
Stove/Furnace Make: KeyStoker
Stove/Furnace Model: 90

Visit Lehigh Anthracite

Re: High temp silicone

PostBy: coaledsweat On: Sat Dec 15, 2007 9:41 am

Kaowool. PM me you address and how much you need, I will send you some.
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Re: High temp silicone

PostBy: jpen1 On: Sat Dec 15, 2007 2:16 pm

Use the kaowool if you don't you'll have one terrible mess. Any good local plumbing shop should have it. The plumbing shop right down from me sells it. The piece in the picture was about $1.50 if I remeber correctly. They carry 3/32 thick all the way up to 1" thick. They use the stuff to seal up combustion blowers on pellet stoves.
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jpen1
 
Stove/Furnace Make: Leisure Line
Stove/Furnace Model: 110 Boiler

Re: High temp silicone

PostBy: LsFarm On: Sat Dec 15, 2007 2:57 pm

This is on a combustion motor flange??? is the paint burnt off the flange?? If not the 500* silicone will work fine. I can't believe that any electric motor blowing air through a mounting flange can have temps exceeding 2-300* or the motor would burn up in short order.

I say go ahead and give it a try. Use small quantities.

Greg L

.
LsFarm
 
Stoker Coal Boiler: Axeman Anderson 260
Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
Baseburners & Antiques: Keystone 11, Art Garland

Re: High temp silicone

PostBy: Matthaus On: Sat Dec 15, 2007 9:47 pm

The only part of a stoker stove exterior that gets over 500*F in my experience is the stove body near the fire (sides and front), the rest of the areas get hot but not that hot. Even the doors are isolated by the rope gasket and the hinge connection, my doors usually measure 400*F max.

I use 500*F silicone to attach the fiberglass rope to the doors. No issues or problems with that. I also use it under the combustion fan flanges to seal and isolate for noise purposes, works great. On the Harman Magnums the fans just slide into a slot, they will back out and rattle if I don't put a small bead on each slot. The silicone has amazing adhesive qualities, I have to slice the bead to get the combustion fan out! :lol:

Of course kaowool works too. :)
Matthaus
 
Stoker Coal Boiler: Leisure Line WL110 Dual Fuel
Hot Air Coal Stoker Stove: Leisure Line Lil' Heater (rental house)
Coal Size/Type: Rice and Buckwheat Anthracite

Re: High temp silicone

PostBy: av8r On: Sat Dec 15, 2007 11:20 pm

Matthaus wrote:The only part of a stoker stove exterior that gets over 500*F in my experience is the stove body near the fire (sides and front), the rest of the areas get hot but not that hot. Even the doors are isolated by the rope gasket and the hinge connection, my doors usually measure 400*F max.

I use 500*F silicone to attach the fiberglass rope to the doors. No issues or problems with that. I also use it under the combustion fan flanges to seal and isolate for noise purposes, works great. On the Harman Magnums the fans just slide into a slot, they will back out and rattle if I don't put a small bead on each slot. The silicone has amazing adhesive qualities, I have to slice the bead to get the combustion fan out! :lol:

Of course kaowool works too. :)

Do you just apply the sealant and bolt it together or let it skin over a bit for better dampening properties?

What RTV do you buy? I have tubes of the black metallic stuff lying around. High heat...
av8r
 
Hot Air Coal Stoker Furnace: Leisure Line Hearth with twin turbos (sounds like it)
Stove/Furnace Make: Leisure Line
Stove/Furnace Model: Hearth model with twin turbos

Re: High temp silicone

PostBy: Matthaus On: Sat Dec 15, 2007 11:27 pm

av8r wrote:Do you just apply the sealant ...What RTV do you buy?


I just put it together, have not really been worrying the noise angle aside from securing from rattles, I would imagine letting it cure for a few minutes first would be a good idea for that.

I get mine on ebay 6 tubes for 11.95 (black), if you do a search on hi temp silicone you can usually find some deals. It is rated at 600*F on some buys and 500*F on others, seems to be the same stuff. I do know the burnt orange rtv is higher temp, we use it at work and it's rated at 750*F.
Matthaus
 
Stoker Coal Boiler: Leisure Line WL110 Dual Fuel
Hot Air Coal Stoker Stove: Leisure Line Lil' Heater (rental house)
Coal Size/Type: Rice and Buckwheat Anthracite

Re: High temp silicone

PostBy: Grinder On: Wed Dec 19, 2007 12:40 pm

Thanks for the replies. Checked into kaowool but, it is too thick. I found 700 degree silicone, after the fact, which would have been my preference. Ended up using high temp gasket glue and sealer. I'm not sure if it helped or not.
Grinder
 
Stove/Furnace Make: KeyStoker
Stove/Furnace Model: 90

Visit Lehigh Anthracite