SG Series Fire Tube Steam Boilers

A perfect wet back fire tube boiler for reducing energy consumption. Reliability, an advanced control system, energy efficiency and a low environmental impact are the key attributes that set this product as the market benchmark for the industrial boiler field. SG boilers are suitable for producing saturated and superheated steam and superheated water.

The SG boiler is a fire tube steam generator, two-pass wet back type with a horizontal design, fully packaged and complete with all the necessary control and safety devices.

SG steam generators have a complete shielding of the inversion chamber with a water tube enclosure. This, compared to other types of boilers, ensures fast access to the flue gas inversion chamber and complete visibility of the tubes, tube sheet, and combustion chamber.

SG series steam generators are manufactured and certified according to the European Directive PED. Other design codes and certifications can be applied, including ASME, SELO, etc., when considering the individual requirements of the customer.

After assembly, the boiler’s internal components are checked through non-destructive testing methods. At the end of the installation, our boilers are extensively fire-tested at our factory.


  • Reliability and durability due to many design solutions: tubes expanded and welded to the tube-sheets; tube-sheets with ledges to guarantee maximum quality of welding between sheet and tubes; the complete absence of refractory and tightening elements; a large volume of the furnace which reduces the formation of carbon deposits and pollution.
  • Combustion system suitable for different fuels: natural gas, biogas, GPL, hydrogen, diesel oil.
  • Simple and quick maintenance due to two-pass design with convenient access to the internal components of the boiler: furnace, inversion chamber, and tube plate.
  • High thermal efficiency due to efficient heat transfer, big exchange surfaces, and optimized heat recovery systems.
  • Multifunctional control system and dynamic monitoring of the boiler operation, ensuring optimal performance and safety even in offline mode.
  • Ability to fully integrate with Smart Factory complexes and other process control systems.
  • Low NOx emissions of less than 80 mg/m3 and lower emissions available on request according to BAT.

Key Features

  • Steam Capacity: 2 – 30 t/h
  • Pressure: 12 – 25 barg
  • Efficiency: Up to 97.5%
  • NOx Emissions: 80 mg/Nm3 (lower values by request)