Best Mat'L, to "Re-Bed" Grates on a Flat Bed KAA2 Stoker.

Stoker Coal Boilers automatically feed the coal and have controls and pumps just like any conventions boiler. They are intended to be used as a primary heat and often have domestic hot water coils as an added bonus. They can be set up independently or in dual sytem with your existing oil/gas boiler. They can accommodate both hot water base board or steam plumbing.
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dave brode
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Posts: 478
Joined: Fri. Jan. 15, 2010 5:47 pm
Stoker Coal Boiler: Keystoker KAA-2
Hand Fed Coal Boiler: used to have a 5 section Red Square
Coal Size/Type: rice anthracite
Location: Frostburg, Maryland [western]

Post Tue. Nov. 19, 2013 10:14 pm

All,

The furnace cement done at the factory isn't holding up well. Anyone tried high temp RTV?

TIA

Dave
I love my Kaa-2. It replaced a small 5 section Red Square, and Iron Fireman, burned bituminous for 20 yr.

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McGiever
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Posts: 5999
Joined: Sun. May. 02, 2010 11:26 pm
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Coal Size/Type: PEA / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek
Location: Junction of PA-OH-WV

Post Tue. Nov. 19, 2013 10:16 pm

Anyone tried high temp RTV?
Don't think you'll find a RTV that is rated up to temps of a coal stoker grate. :|
SLOW AND STEADY WINS THE RACE

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dave brode
Member
Posts: 478
Joined: Fri. Jan. 15, 2010 5:47 pm
Stoker Coal Boiler: Keystoker KAA-2
Hand Fed Coal Boiler: used to have a 5 section Red Square
Coal Size/Type: rice anthracite
Location: Frostburg, Maryland [western]

Post Tue. Nov. 19, 2013 10:20 pm

McGiever wrote:
Anyone tried high temp RTV?
Don't think you'll find a RTV that is rated up to temps of a coal stoker grate. :|
Dunno. How hot do you think it runs?

Whatfer brand Cement you guys have luck with?
I love my Kaa-2. It replaced a small 5 section Red Square, and Iron Fireman, burned bituminous for 20 yr.

Visit Alternate Heating Sytems

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McGiever
Member
Posts: 5999
Joined: Sun. May. 02, 2010 11:26 pm
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Coal Size/Type: PEA / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek
Location: Junction of PA-OH-WV

Post Tue. Nov. 19, 2013 10:28 pm

Somewhere up near 1500-2000, maybe.

Big box stores have a couple brands of cement in small plastic tub and some have it in caulk tubes.
SLOW AND STEADY WINS THE RACE

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2001Sierra
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Posts: 1844
Joined: Wed. May. 20, 2009 8:09 am
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
Location: Wynantskill NY, 10 miles from Albany

Post Wed. Nov. 20, 2013 11:56 am

I used Imperial furnace cement from True Value. The stuff had great adhesive properties, sticks well, and great fun to get off your hands. I dampened the cast area first and then spread the furnace cement with my finger, no tools I found worked as well. Run a dampened finger over it, smoothes out real nice. Holds up well. Good to 2100 F.

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McGiever
Member
Posts: 5999
Joined: Sun. May. 02, 2010 11:26 pm
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Coal Size/Type: PEA / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek
Location: Junction of PA-OH-WV

Post Wed. Nov. 20, 2013 5:58 pm

Our local Home Depot has small (8oz size) plastic tub of Imperial Cement, and it's made in USA. :D
SLOW AND STEADY WINS THE RACE

Visit Alternate Heating Sytems

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dave brode
Member
Posts: 478
Joined: Fri. Jan. 15, 2010 5:47 pm
Stoker Coal Boiler: Keystoker KAA-2
Hand Fed Coal Boiler: used to have a 5 section Red Square
Coal Size/Type: rice anthracite
Location: Frostburg, Maryland [western]

Post Wed. Nov. 20, 2013 8:34 pm

Thanks, Gents. how much cure time before re-firing??
I love my Kaa-2. It replaced a small 5 section Red Square, and Iron Fireman, burned bituminous for 20 yr.

User avatar
2001Sierra
Member
Posts: 1844
Joined: Wed. May. 20, 2009 8:09 am
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
Location: Wynantskill NY, 10 miles from Albany

Post Wed. Nov. 20, 2013 9:00 pm

Says 24 hours mine went 12 hours tops and is doing just fine. You know my grates sat there all summer, and guess what it was forcasted for a cold nite and who would of thunk to seal the grates ahead of time :oops: Before work sealed them, and fired up after work with no problem. If it drys and seals as quick as it does to my fingers 24 hours drying time is overkill.

User avatar
dave brode
Member
Posts: 478
Joined: Fri. Jan. 15, 2010 5:47 pm
Stoker Coal Boiler: Keystoker KAA-2
Hand Fed Coal Boiler: used to have a 5 section Red Square
Coal Size/Type: rice anthracite
Location: Frostburg, Maryland [western]

Post Wed. Nov. 20, 2013 10:08 pm

2001Sierra wrote:Says 24 hours mine went 12 hours tops and is doing just fine. You know my grates sat there all summer, and guess what it was forcasted for a cold nite and who would of thunk to seal the grates ahead of time :oops: Before work sealed them, and fired up after work with no problem. If it drys and seals as quick as it does to my fingers 24 hours drying time is overkill.
LOL, yea, a guy should look at them close well before heating season.
I love my Kaa-2. It replaced a small 5 section Red Square, and Iron Fireman, burned bituminous for 20 yr.

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