Product Description

The SM Firetube Boilers are our high efficiency, direct fired two pass dry back boilers.  The burner's flame travels down the firetube and enters the inversion chamber.  The exhaust gases then travel from the inversion chamber through the combustion tubes and exit the boiler through the exhaust stack.  The dry back design refers to the use of refractory at the back of the boiler in the inversion chamber.

The SM Firetube Boiler is specifically designed to minimize the thermal stress on the boiler, not only at high pressures, but at low pressures as well.  In addition, the firetube boilers are designed with a large thermal inertia, allowing for fluctuations in steam demand and are ideal for continuous 24/7/365 applications.

The SM has the opportunity to be supplied with a variety of forced draft burners provided by some of the world’s leading burner manufactures.  This allows us to utilize a variety of fuels, meet stringent emissions requirements, and even allow our customers the opportunity to select the burner of their choice.

The SM-PA is our high efficiency option of the SM Fire Tube Boiler.  The SM-PA is constructed in a horizontal orientation and is supplied with a combustion air preheater at the burner side of the heater.

The SM-ECO is our feedwater preheater option of the SM Firetube Boiler.  The feedwater preheater utilizes an economizer to preheat the water entering the steam generator.  This enables the customer to obtain optimum performance of the generator by supplying the necessary feedwater temperatures to the Firetube Boiler.

The BONO SM, SM-PA and SM-ECO Firetube Boilers are fabricated by our partner in Italy, BONO Energia, and are available designed / constructed to various local code requirements around the world.  The most common codes are ASME with National Board registration for the United States, CRN for Canada, and CE/PED/TUV/DIN for Europe.  Additional code requirements may be met if necessary.

Package and containerized systems are available for both the SM, SM-PA, and SM-ECO Firetube Boilers.  These package systems can be customized to meet each of our customers’ needs, including but not limited to: control panel, feed water pumps, feedwater treatment, deaerators, feedwater tanks, and ancillary components.  These auxiliary components are typically fabricated in the USA for USA/Canada installations.  

Fire Tube Boilers In General

Fire tube boilers are a form of large water content boilers used to provide customers with steam as a heat transfer media. Typically, the quality of steam provided by these units is much higher than forced circulation steam generators.  The higher quality of steam mitigates the use of steam separators or steam accumulators.