Projects

Every year, numerous companies place their trust in the Callens Group. We deliver installations tailored to your needs and future ambitions, from brand-new systems to complex renovation projects. With temporary rental boilers, we keep your production running throughout the works. And once your installation is up and running, you can continue to rely on our service to keep it performing at its best.

Hybride Stoomketels Tiense Suiker 2
Heat technology Steam boilers Hybrid +2

Zero by 2050 is coming closer with hybrid steam boilers

Capacity2 x 15 T/h
Design pressure13 barg
Eboiler 4
Heat technology Electrode boilers Steam boilers +2

E-boilers combine increased production with lower CO₂ emissions

Capacity2 x 5 MW 
Connection voltage15 kV
“Every technological breakthrough sets something in motion. While innovation used to almost automatically involve major investments, today we see technologies that are mature, scalable and economically viable. At every stage of the heating and air process, we can make a difference.”
Decospan Menen VKK 4 T 15 MW PRJ240302 4
Heat technology Steam boilers Hybrid +2

Hybrid power for a volatile energy market

Capacity6.3 T/h (4 T/h + 1.5 MW electric)
Design pressure13 barg
Callens Warmtepomp 3
Heat technology Industrial heat pumps Electrification +1

Industrial heat pumps reduce CO₂ emissions

Capacity4.2 MW
Energy source100% electricity
Soudal Turnhout afzuiging drijfgassen PRJ12563 13
Air technology Extraction Gas and vapor extraction

Extraction system takes on hazardous propellants

Capacity40,000 m3/h
Zone typeAtex
PRJ250188 Poppies Zonnebeke Warmtetechniek 2
Heat technology CO2 reduction Energy recovery for thermal technology

Waste heat from baking ovens keeps buffer tank temperature stable

Capacity per condenser43 kW
Exhaust airflow1,200 m³/h
Lamb Weston 900kgh 22 barg Bergen op Zoom PRJ220144 1
Heat technology Steam boilers Electrification +2

100% electric steam boiler brings new potato flavors to temperature

Capacity900 kg/h
Operating pressure22 barg
Working pressure16-18 barg
Callens stoom 1
Heat technology Hydrogen-fired CO2 reduction +1

Steam boiler feels the heat of hydrogen

Capacity25 T/h
Design pressure25 barg
Volvo Car Gent penthouse 2x36000 m2 PRJ230077 1
Air technology Climate control Industrial ventilation +1

Double ventilation system for safe battery assembly

Supply and exhaust2 x 36.000 m3 per unit
Power730 kW per unit
Agfa Gevaert Mortsel Eboiler weerstand 5 MW Danstoker PRJ230202 1
Heat technology Electrification Electric +2

Electric steam boiler efficiently harnesses surplus electricity

Capacity8 T/h
Power5 MW
Design pressure10 barg
Brouwerij De Brabandere Bavikhove ST biogas 25 T PRJ12427 1
Heat technology Valorizing waste flows Biogas-fired +2

Steam boiler utilizes brewery’s biogas maximally

Capacity2.5 tons/h
Operating pressure13 barg
Working pressure8 barg
Callens luchtontvochtiging kartonproducent 1
Air technology Drying Process air +2

Dehumidification with additional air conditioning and heat recovery

Extraction flow 4 x 28,000 m3
Supply air flow 4 x 28,000 m3
Heating capacity4 x 224 kW
Katoen Natie Antwerpen ST 25 T Containerverwarming PRJ12707 4
Heat technology Steam boilers Gas-fired

Steam and central heating system keep bulk containers reliably warm

Capacity2,5 T/h
Operating pressure13 barg
20230426 153901
Heat technology Steam boilers Gas-fired +2

From expensive overcapacity to balance with backup steam

Capacity2 x 5T
Seal pressure10 barg
Operating pressure6 barg
<Digimax S500 / Kenox S500 / Digimax Cyber 530>
Heat technology Hot water & industrial central heating boilers Gas-fired

Condensing central heating boilers keep transport tanks nice and clean

Output2 x 2,000 kW
Fuelnatural gas
Combustion efficiency106 %
Callens cvketel wisselende warmtevraag
Heat technology Hot water & industrial central heating boilers Gas-fired

Central heating boiler rides the waves of a wood drying plant’s fluctuating heat demands

Output4,200 kW
Combustion efficiency95%
Tereos Syral Aalst ST 3x30 T PRJ7761
Heat technology Steam boilers Gas-fired +1

Combined heat and power system getting backup from 90 tons of steam an hour

Output3 x 30 tons of steam/h
Operating pressure18 barg
Efficiency96%
20210824 102740
Heat technology Steam boilers Gas-fired

Steaming research for better and more sustainable vegetable and potato products

Capacity1.000 kg/h
Operating pressure21 barg
Callens stoom vlampijp Colac 1
Steam boilers Gas-fired Backup +1

Heat from fire-tube boiler to industrial cooking pots

Capacity2 x 3 200 kg/h
Operating pressure13 barg
IMG 2718
Heat technology Thermal oil boilers Gas-fired

Solution to highly diverse heating needs

Output2 x 5,200 kW
Operating regime250 - 290 °C
Callens tankverwarming transport 1
Heat 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
Konings Drinks Bredea ST Piping 14 T PRJ12518 1
Heat technology Steam boilers

Extra piping allows launch of new production line for canned fruit juices

Capacity14 t/h
Operating pressure12 barg
Working pressure8 barg
Callens warmterecuperatie 1
Heat technology Energy recovery for thermal technology

Heat recovery gives lost energy a new lease of life

Output1,500 kW
Output1,100 kW (backup )
20200312 105518 bewerkt
Heat technology Dual fuel Steam boilers

Steam plant with 'dual fuel' burner balances heat supply

Capacity7t/h
Working pressure10 barg
IMG 20190306 165335502
Heat technology Steam boilers Gas-fired +2

Steam and thermal oil ingeniously combined

Capacity300 kg/h
Power195 kW 
Operating pressure0,5barg 
Tekst LHS WPT PRJ10513 Guardian Luxguard
Thermal oil boilers Gas-fired Heat technology

Thermal oil puts the heat on glass in the autoclave

Output1.920 kW
FuelNatural gas
Stoom transport reiniging Callens 2
Heat technology Steam boilers Gas-fired

Cleaning system for food tankers

Output1.000 kg steam/h
Operating pressure13 barg
Working pressure10 to 11 barg
20210617 120754
Heat technology Steam boilers Gas-fired

Belgian cheese factory brings out creative dairy with the help of Belgian steam

Capacity360 kg/h
Operating pressure10 barg
Working pressure3 to 4 barg
Callens stoom geneesmiddelen
Heat technology Steam boilers Gas-fired

Medicines guaranteed safe and energy-efficient steam

Output16 t/h
Operating pressure10 barg
La Lorraine CV 850 k W PRJ210133 10
Heat technology Hot water & industrial central heating boilers Gas-fired +1

Heat excites taste buds in industrial bakery

Capacity850 kW
Efficiency95,5%
Fluxys Merelbeke TO gasontspanstation 3x465 k W PRJ4183 1
Hot water & industrial central heating boilers Gas-fired Heat technology

Central heating boilers heat gas pressure regulating station

Output3 x 465 kW
Fuelnatural gas
Callens stoomketels DEF
Steam boilers Gas-fired Heat technology

60 tons of steam for 100 % Belgian potato products

Capacity60 t/h
Working pressure24 barg
Fuelnatural gas
Callens ventilatie lucht 1
Air technology Industrial cooling

Ventilation brings in comfort

Air flow rate 140.000 m3/h
Air flow rate 280.000 m3/h 
Air flow rate 3100.000 m3/h 
Callens Vynova stoomketel waterstof 1
Heat technology Hydrogen-fired Valorizing waste flows +2

Hydrogen fires 60 tons of sustainable steam per hour

Capacity2 x 30 ton/h
Design pressure16 barg
Fuelhydrogen, natural gas, combination
CO2-reduction10.000 ton/year
Beschikbare hoeveelheid H2> 1.200 kg/h
Callens stoom geurgassen Empro 1
Heat technology Steam boilers Gas-fired +1

Odorous gases routed to burner for treatment

Capacity9 t/h 
Boiler output5,859 kW
Callens stoomketel 1
Heat technology Gas-fired Steam boilers

Steam quality brings back peace of mind

Working pressure8 barg
Efficiency95%
STT K700 ESM 2x4 T1x2 T 1
Heat technology Steam boilers Gas-fired

Steam generators heat the shore

Flow rate10 tons/uur
Set pressure8 barg