Danfoss Valve for Stoker Safety

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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Joined: Mon. Nov. 19, 2007 9:33 pm
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove
Location: Lehigh Valley, PA

Post Fri. Nov. 07, 2008 9:08 pm

I was working on a little invention for my wood/coal boiler to put out the fire in case of an electrical outage, but Danfoss beat me to it. :mad:

It's called a BVTS thermostatic valve for bio-mass boilers. It can accomplish two purposes. It can add cold water to an overheating boiler, or it can spray water onto a wood/coal fire to extinguish it in the event of a power outage, and it requires no electricity to operate and automatically shuts itself off when the overheating situation is corrected.

For water temperature control, the "valve is used to prevent the water in the bio-mass boiler from overheating. If the water temperature rises, the valve will open and let cold water through the heat exchanger system, thus quickly and efficiently lowering the temperature."

For back-burning protection the "thermostatic valve will operate safely regardless of the ambient temperature and the self-acting technology means that the valve does not reqire electricity or other forms of energy in order to work."

"Thermostatic valves play two very important roles in small, solid fuel boilers. The first is to sprinkle water onto the bio-mass fuel if the burning process moves backwards into the fuel feed screw and magazine The second is to dissipate excess heat so that the water temperature does not exceed 100º C in the boiler."

"For more information, please visit our biomass site."

Click here for the complete information:

http://www.danfoss.com/NR/rdonlyres/80189818-C968 ... 00E102.pdf

It's new and I am looking into it for my own use, and so is efm.

It has a probe like an aquastat which controls a valve that will allow water to be added to an overheating boiler or even spray onto or into a firebox or coal pipe, to the best of my understanding. I'll post more info when it becomes available.

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Posts: 6606
Joined: Fri. Apr. 11, 2008 2:54 pm
Stoker Coal Boiler: Axeman Anderson 130 (pea)
Hot Air Coal Stoker Stove: Reading piece o' junk in the barn (rice)
Coal Size/Type: Pea size, Superior, deep mined
Location: Orrington, Maine

Post Sat. Nov. 08, 2008 4:10 am

Nice idea. Sure looks like a $300 item to me.
Orrington, Maine

"If you can't say something nice, don't say anything at all".

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