Flash Coil Steam Generators

For instantaneous steam production, the boilers take just 2-3 minutes to start up and supply steam, offering a wide range in terms of steam production and design pressure. UM and UM-HP series are the best choice for applications requiring small steam flow rate, fast start-up, and medium/high operating pressures.

UM flash coil steam generators include forced circulation and guarantee a steam production range between 500 – 4.000 kg/h. They can be supplied both in vertical or horizontal models, fully packaged and with all the necessary equipment to be connected with site utilities.

UM-HP series are steam generators of the natural circulation type. The coil is manufactured in 16 Mo3 to guarantee a long life for the boiler even in challenging working conditions, with pressure steam up to 100 barg and temperatures up to 312°C. The coil’s dimensions, large furnace, low thermal load, and low-pressure drops ensure steam circulation already at low pressure.

Customized solutions are possible for high-pressure applications, especially in terms of design pressure up to 80 barg.

These steam generators are manufactured in-house on our dedicated line for seamless, perfect production of pipes and spirals.

Water forced by a piston pump is circulated through pipes forming the heating surface, which is divided into three sections for:

  • Preheating of feedwater
  • Conversion of water into steam
  • Slight superheating of steam to reduce water content

UM steam boilers are supplied in standard and container versions.

Ideal for special applications, such as edible oil refineries, UM-HP boilers are fully customized and tailored to the customer’s needs.


  • Two different models available: UM and UM-HP
  • Possibility to exempt licensed operators.
  • Quick steam output availability, suitable for discontinuous applications.
  • Small footprint and compact design, both in vertical and horizontal designs.
  • Customized solution according to specific customer requests, especially for high-pressure applications with design pressure up to 80 barg.
  • Maximum efficiency that can be further improved by equipping the boilers with a heat recovery system (economizer), increasing thermal efficiency.
  • NOx emissions of less than 80 mg/m3 due to its optimized combination with any market burner (according to BAT).
  • Combustion system suitable for different fuels (natural gas, liquefied petroleum gas, diesel fuel, and hydrogen).
  • UM equipment complies with international standards, including PED, ASME, SELO, GOST-R, RTH, IBR, JIS, etc.
  • Easy maintenance: the upper cover facilitates inspection and cleaning of the combustion chamber and the internal parts of the steam generator.

Key Features

  • Steam Capacity: 0.5 – 5 t/h
  • Pressure: 10 – 80 barg
  • Efficiency: Up to 93%
  • NOx Emissions: 80 mg/Nm3 (lower values by request)