Gas-fired steam boiler

Gas-fired steam boilers are still the backbone of countless industrial production processes. Thanks to their high reliability, broad output range and proven technology, they remain the most economical solution for producing process steam for many companies.

The Callens Group designs, builds and integrates gas-fired steam installations within your production environment. What do our specialists take account of? Steam demand, energy consumption and emission targets — but also your future expansion plans. Nothing is left to chance.

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When is a gas-fired steam boiler the right choice?

A gas-fired steam boiler is often the most suitable solution when your production process has a continuous, reliable demand for process steam. Thanks to the high availability of natural gas, fast start-up times and broad applicability, gas-fired boilers remain an attractive choice, both technically and economically.

What’s more, today’s gas-fired steam boilers are considerably more efficient and environmentally friendly than older installations. By applying high-efficiency burners, economizers, flue gas heat recovery and advanced control technology, we reduce your fuel consumption and emissions.

5 reasons to consider gas-fired steam production

  • You have a natural gas connection or existing gas infrastructure.
  • You have a continuous or high steam demand.
  • You want an installation that can subsequently be expanded with hybrid solutions or alternative fuels.
  • You’re looking for a reliable technology with a proven track record.
  • You want a favorable balance between investment, return and operating costs.
Callens Gasgestookte Stoomketel

Output

up to 100 MW

Capacity

25 kg/h to 150 t/h steam

Design pressure

0.5 to 100 barg

Efficiency

up to 99 %

Technical specifications of gas-fired steam boilers

You don’t choose a steam boiler based on a single parameter. On the contrary, operating pressure, consumption peaks, operating hours, redundancy all come into play.

That is why our engineers analyze the full operational context of your site. The result is an installation that is tailored to your needs and ready for developments such as electrification, hybridization or alternative fuels.

The Callens Group has an extensive portfolio of both compact and large-scale installations. View the projects.

benefits

Advantages of a gas-fired steam boiler

For many industrial companies, gas-fired steam boilers remain the benchmark for reliable steam production. The technology combines high availability with strong controllability and an attractive economic return.

High operational reliability

Gas-fired boilers are reliable under a wide range of operating conditions.

Broad output range

From modest steam requirements to very large industrial steam plants: there are gas-fired boilers for virtually any output.

High energy efficiency

Modern burner technology, economizers and flue gas heat recovery deliver optimal fuel efficiency and lower operating costs.

Easily expandable

Gas-fired installations can be readily combined with electric steam boilers, e-boilers, CHP units or alternative fuels.

Proven technology

Thanks to extensive market experience, maintenance, spare parts and technical support are all only a phone call away.

Broadly applicable

Gas-fired steam boilers are suitable for a wide range of sectors and applications, from the food industry and the chemical sector to the pharmaceutical industry and energy production.

Callens Service Onderhoud 3

Maintenance of your gas-fired steam boiler and 24/7 service

The Callens Group’s maintenance and service team makes sure your installation keeps performing at its best, even after commissioning. With an in-house team of more than 120 service and maintenance technicians, we schedule preventive maintenance in line with the legal and technical requirements of your installation.

You can also count on fast support whenever an unexpected breakdown occurs. Thanks to our 24/7 on-call service, an extensive range of spare parts and the expertise of our service technicians, we carry out interventions quickly and effectively.

Even the best maintained installation can malfunction or shut down unexpectedly. That is why the Callens Group offers various service packages, tailored to the response time and support you need. So even in unforeseen situations, you can count on our expertise.

More about our service packages
partnership

Why partner with Callens Group?

60 years of experience in EPCS projects

An independent integrator focused on your specific needs

Flexible project execution

Short decision-making lines and a personal approach

Unique service & maintenance support

With 13 locations, always close by

Schermafbeelding 2026 08 28 100631
“Maximizing energy efficiency doesn’t start with choosing a technology, but with mapping out your environment and goals.”

Projects with gas-fired steam installations

Callens tankverwarming transport 1
Thermal technology Steam boilers Gas-fired +2

Ambitious transport company constructs extra lanes for tank heating with steam and central heating boilers

Capacity4 ton / h
Operating pressure10 barg
Callens stoom geneesmiddelen
Thermal technology Steam boilers Gas-fired

Medicines guaranteed safe and energy-efficient steam

Output16 t/h
Operating pressure10 barg
IMG 20190306 165335502
Thermal technology Steam boilers Gas-fired +2

Steam and thermal oil ingeniously combined

Capacity300 kg/h
Power195 kW 
Operating pressure0,5barg 

Discuss your challenge or project with our experts

Would you like to explore which solution is suitable for your specific project?

Our engineers are happy to think along with you, from initial exploration to concrete engineering.

Contact

Questions? We have the answers.

Sizing not only looks at maximum steam consumption, but also factors such as peak loads, operating hours, future expansion plans and desired redundancy. Correct sizing prevents unnecessary energy consumption and ensures a stable steam supply.

The quality of the feedwater has a major impact on the service life, safety and efficiency of a steam boiler. Water that hasn’t been treated properly can cause corrosion, deposits and loss of efficiency. That is why water treatment will almost always form part of a professional steam installation.

A steam boiler requires periodic maintenance of, among other things, the burner, safety devices, water treatment and control components. Regular maintenance not only increases operational reliability but also helps keep the installation’s efficiency up to standard. Want to know more about our maintenance contracts and 24/7 service? Our specialists will be happy to fill you in.

Absolutely. Heat recovery is one of the most effective ways to increase the efficiency of a gas-fired steam installation. Techniques such as economizers, flue gas heat exchangers or condensate recovery make it possible to reuse heat that would otherwise be lost within the production process. The recovered energy can be used to, for instance, preheat feedwater, process water or other heat consumers on site. This lowers fuel consumption, reduces CO₂ emissions and helps cut operating costs. Want to know how much energy your steam installation could potentially recover? Our specialists will gladly analyze your current installation.

Modern steam boilers feature modulating burners that automatically adjust output to the current steam demand. This keeps the steam pressure stable and avoids unnecessary fuel consumption.

With proper maintenance, an industrial steam boiler can easily remain operational for twenty to thirty years or more. Do bear in mind though that its effective service life will depend on factors such as water quality, operating hours, load profile and maintenance.

As an EPCS integrator, Callens Group takes charge of the entire process: from on-site analysis and engineering to installation and service. You can find out more about the various steps in our workflow here.

The applicable emission requirements vary by country, sector and installation output. Modern steam boilers are therefore often equipped with low-NOx burners and advanced control technology to comply with the current environmental legislation.

Yes. Although electrification is becoming increasingly important, modern gas-fired steam boilers remain a relevant technology within the energy transition. Through high efficiency, heat recovery, hybrid configurations and alternative fuels, companies can reduce their emissions step by step without compromising operational reliability. Want to know which sustainability options are possible for your steam plant? Our engineers will be happy to explore them with you.

For a producer of oils and fats, the Callens Group delivered a new steam plant with a gas-fired backup steam boiler and an HRSG installation coupled to a gas turbine. The existing installation was bedeviled with malfunctions, putting the stability of the steam network and process temperatures under pressure. A backup boiler of 23 tons of steam per hour restored the continuity of the production process. The project resulted in more efficient, more reliable steam production, with a capacity of 23 t/h on natural gas, a design pressure of 18 barg and an operating pressure of 15 barg. More info:

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