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Age of a Crane 20 Boiler # 20-B Series X-A




Looking to know how old this beast that keeps the cast iron piping in this 1920 house warm. THANKS, T
SuperTech

Comments

  • Steamhead
    Steamhead Member Posts: 14,853
    I'd say probably 1940s or early 1950s. The burner is newer and, depending on what head is on it, might be a decent one. I ran into a similar one here, that someone had made a mess of:

    https://forum.heatinghelp.com/discussion/170456/door-mount-disaster-or-ohhhhh-this-is-just-wrong

    Where are you located?
    All Steamed Up, Inc.
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • STEVEusaPA
    STEVEusaPA Member Posts: 5,319
    Dirt...old as dirt. At least you can stick your entire head in there and look at the flame.

    You're barometric dampers are installed incorrectly on both appliances. Ok that way for gas, not for oil.

    2 pipe oil... @EBEBRATT-Ed will be so happy :)
    steve
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 10,349
    @STEVEusaPA ,

    This made my day. I spotted the two pipe right off the bat but you beat me to the punch :):):):)
    STEVEusaPASuperTech
  • mattmia2
    mattmia2 Member Posts: 3,991
    That's a nice job on the asbestos.
    SuperTech
  • STEVEusaPA
    STEVEusaPA Member Posts: 5,319
    Btw, does anyone know what this means in the nameplate?
    “Valve Capacity 292 lbs/hr”
    steve
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 10,349
    @STEVEusaPA

    Oil firing rate is 2.00gph so 2 x 140000=input of 280000

    Safety valve capacity of 292lb/hour is 292 X (btus in a lb of steam which is 1000) so 292 x 1000=292,000.

    There just telling you what the minimum size safety valve should be.

    mattmia2STEVEusaPA
  • STEVEusaPA
    STEVEusaPA Member Posts: 5,319
    Thanks @EBEBRATT-Ed. So, is that for the PRV? If so, what's the conversion? Just wondering...
    steve
  • mattmia2
    mattmia2 Member Posts: 3,991
    It is for the relief valve. If you look closely on a relief valve they have a rating of how much energy they can dump when they open.
  • STEVEusaPA
    STEVEusaPA Member Posts: 5,319
    Was this at a time before they just universally decided for residential-30 psi for water & 15 psi for steam?
    steve
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 10,349
    @STEVEusaPA

    Pressure isn't an issue steam is 15 psi. It's just another way of expressing the BTUs that the steam relief valve must pass.

    For some reason on smaller boilers they usually use BTU/HR.

    But on old residential (like above) and larger commercial stuff they use LBS of steam/ hour for the valve capacity.

    On low pressure (under 15psi) the BTUs/LB of steam is usually considered to be 1000 btu/LB.

    I think it's actually 970/LB at 212 degrees. But the btus/LB varies with the steam pressure
    STEVEusaPA
  • mattmia2
    mattmia2 Member Posts: 3,991
    23 # of coal per hour? That seems like a lot.
    SuperTech
  • Steamhead
    Steamhead Member Posts: 14,853
    @NarrowGateFarm , where are you located?
    All Steamed Up, Inc.
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting