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Re:Re: (erielack) Feedwater heaters [was New Photos on Websi

Most Coffin heaters were in the form of a bent box to conform to the shape of the boiler.  They could be mounted externally, on the front of the smokebox (B&M Berkshires) or internally, within the smokebox (some NYC Hudsons)>

All heaters worked basically the same:  they took water from the tender, heated it with boiler steam, and pumped it into the boiler already hot, to increase the efficiency of the steam-making process.  Sinc they had to overcome the pressure within the boiler, they were very sturdy affairs.

Randy Brown
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Coffin made feedwater heaters also, a weird horseshoe-shaped tube that was mounted in front of the smoke box, not sure how this device worked.

T


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