EFM 700 stoker experience

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Dave 1234
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Posts: 788
Joined: Tue. Nov. 13, 2012 9:05 am
Stoker Coal Boiler: 1948 International boiler, EFM S-20 stoker
Coal Size/Type: Buck,

Post by Dave 1234 » Sun. Oct. 08, 2017 2:38 pm

I'm looking for input on a 700 . I have a 520 stoker that is very reliable all year around . How reliable are the rotating pots under light loads only , say in spring and summer when you only need DHW ?

Next thing is what about the gearbox to rotate the pot? Is this a big PITA or once rebuilt are they good for many years ?

My gut concern is mostly about draft excaping from under the pot at the gooseneck instead of going trough the coal bed. I hate ''out-fires''.

Thanks Dave !

 
lzaharis
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Joined: Sun. Mar. 25, 2007 8:41 pm
Location: Ithaca, New York
Stoker Coal Boiler: Keystoker KAA-4-1 dual fuel boiler
Hand Fed Coal Boiler: former switzer CWW100-sold
Coal Size/Type: rice
Other Heating: kerosene for dual fuel Keystoker/unused

Post by lzaharis » Wed. Oct. 11, 2017 10:56 am

You could call the folks at EFM or Marks Supply and ask them.

 
Pacowy
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Posts: 3555
Joined: Tue. Sep. 04, 2007 10:14 pm
Location: Dalton, MA
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite

Post by Pacowy » Wed. Oct. 11, 2017 3:30 pm

I've used 700, 900 and larger rotating pot stokers, and don't recall any particular issues under light loads, including summer DHW. Likewise, I don't think those gearboxes cause frequent problems. Like anything mechanical, they may wear out eventually (as may the teeth on the pot that are engaged by the gearbox), but generally they are very durable.

Mike


 
Dave 1234
Member
Posts: 788
Joined: Tue. Nov. 13, 2012 9:05 am
Stoker Coal Boiler: 1948 International boiler, EFM S-20 stoker
Coal Size/Type: Buck,

Post by Dave 1234 » Thu. Oct. 12, 2017 5:01 pm

So just like the 520's , set=and=burn. I''ll take that. Thanks for the first hand advice Mike !

Dave

 
Pacowy
Member
Posts: 3555
Joined: Tue. Sep. 04, 2007 10:14 pm
Location: Dalton, MA
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite

Post by Pacowy » Thu. Oct. 12, 2017 5:41 pm

You're quite welcome.

Mike

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