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    Firing rate - ratings versus actual (2 Posts)

  • MarkS MarkS April 21, 2011 @ 1:42 PM
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    Firing rate - ratings versus actual

    I have a Utica oil-fired steamer with a 1.50 GPH @ 140 PSI nozzle. The service tech confirmed the actual nozzle size and operating pressure. I have an hour meter installed on the boiler, and track usage when the tank is filled. In 9 fills over the last two seasons, the calculated actual flow rate has been between 1.67 and 1.96 GPH, with the majority in the 1.75 GPH range.

    Are these normal deviations? I don't expect it to hit 1.50 all the time, but if it's consistently 0.25 higher than that, does that indicate a problem or something to be checked?

    Thanks,
    Mark
    Homeowner, Royersford PA | 1890 one-pipe steam system | 3 floors | 14 radiators |
    Utica SFE5175S boiler | Beckett AFG burner @ 1.50 gph | 0-30 inH2O low pressure gauge | Vaporstat |
    245 MBH | 633 sf EDR | 607 sf connected load | Operating pressure: 2 oz |
    Four main runs (insulated) totaling 135 ft in length | All Gorton vents on mains & rads |
    This post was edited by an admin on April 21, 2011 2:13 PM.
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  • Alan R. Mercurio Alan R. Mercurio April 21, 2011 @ 2:24 PM
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    Mark

    @140 psi your actuall firing rate would be 1.7748239
    Please feel free to use the calculator at Oil Tech Talk anytime, It's Free!

    http://www.oiltechtalk.com/toolbox.shtml
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    Alan R. Mercurio

    www.oiltechtalk.com
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