Firetube Boilers - Two Pass Dry Back (SM)

Steam Boilers

Product Code:
SM, SM-PA, SM-ECO
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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.

Product Specifications

Capacity Range:

  • 70 to 425 BHP(69 to 4150kW)

Steam Production:

  • 4,900 to 14,500 lb/hr (2,200 to 6,600 kg/hr)

Operating Pressures:

  • 174 to 435 psi (12 to 30 bar)

Fuel Option:

  • Natural Gas
  • #2 Fuel Oil/Diesel
  • Light Fuel Oils
  • LPG
  • Dual Fuel
  • Additional Fuel Options Available

Orientation:

  • Horizontal

Two Pass, Dry Back Design

Thermal Efficiency

  • Up to 95%

Combustion Air Preheater Optional

  • Model SM-PA

Economizer Optional

  • Model SM-ECO

Model Overview

Summary by model
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Model Thermal Capacity
(BTU/hr)
Thermal Capacity
(kCal/hr)
Thermal Capacity
(kW)
Flow Rate
(gpm)
Model Steam Production
(kg/hr)
Steam Production
(lb/hr)
Steam Production
(From and at 212°F)
(lb/hr)
BHP Thermal Capacity
(kW)
UM 30 300 661 735 21 206
UM 50 500 1,102 1,224 36 353
UM 100 1,000 2,205 2,449 71 697
UM 150 1,500 3,307 3,673 106 1,040
UM 200 2,000 4,409 4,898 142 1,393
UM 300 3,000 6,614 7,347 213 2,090
UM 400 4,000 8,818 9,796 273 2,678
Model Steam Capacity
(kg/hr)
Steam Capacity
(lb/hr)
BHP Thermal Capacity
(kW)
HP 50 500 1,102 32 314
HP 100 1,000 2,205 64 628
HP 150 1,500 3,307 96 942
HP 200 2,000 4,409 128 1,256
HP 300 3,000 6,614 192 1,884
HP 400 4,000 8,818 256 2,512
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Model Steam Production
(kg/hr)
Steam Production
(lb/hr)
Steam Production
(From and at 212°F)
(lb/hr)
BHP Thermal Capacity
(kW)
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Model
Part Number
Item
Description
Thermostat
Type
Watts Volts Amps Plug Type Lead Time

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