Oil（Gas）Fired Steam Boiler is of the type three-pass with wet back and central back-flame in the series steam output more than 1T/H,flame tubes are symmetrical on furnace axis,Oil（Gas）Fired Steam Boiler is of the type three-pass with wet back and central back-flame in the series steam output more than 1T/H,flame tubes are symmetrical on furnace axis, uniform distribution is good to improve the stress of the Tube plates, fully wet back structure combustion chamber inundates water completely so cooling conditions is good and back tube plates will not be scoured by the high-temp smoke, so the boiler running conditions and durability can be improved.http://www.balturboiler.com/