
Thermal and process engineering apparatus, recuperators, heat exchangers and additively manufactured HPEx® heat exchangers from Kempen.
Hülsenbusch Apparatebau GmbH & Co. KG
Kempen (Headquarters / Production)New on Amplifa
About Hülsenbusch Apparatebau
Hülsenbusch Apparatebau GmbH & Co. KG from Kempen (location Hülser Str. 49, Hülser Str. 49, 47906 Kempen; brand RBU Germany) is a manufacturer of thermal and process engineering apparatus and systems. The manufacturing range includes recuperators, air heaters, heat exchangers, flue gas coolers as well as heat recovery and waste incineration plants. In addition to conventional metal and stainless steel processing, the company produces HPEx® heat exchangers additively using 3D printing. Its value chain includes engineering, manufacturing, assembly, maintenance, piping and steel structure installation as well as an industrial boiler service with emergency response. Customers come from the steel industry, waste incineration, shipping and energy research, including ArcelorMittal Duisburg and DLR, for whom the test receiver TubeMon was manufactured. Since 2021, in-house 3D scanning technology for measurement and testing has been available.
- Site
- Kempen
- Processes
- Additive manufacturing of HPEx® heat exchangers (3D-printed recuperator), Manufacture of thermal and process engineering apparatus and systems (recuperators,, Welding work / industrial boiler service (including emergency repair work, e.g., Piping and steel structure installation, Assembly, maintenance and repair of technical systems of all kinds, Metal and stainless steel processing, Engineering (design of process engineering systems and components), 3D scanning technology (measurement/testing)
- Materials
- Stainless steel, Steel, Additive manufacturing (HPEx®), 3D scanning technology
- Certificates
- 3D scanning technology / measurement
- Employees
- 51-200
- Industries
- Apparatus engineering, Thermal engineering / heat recovery, Waste incineration, Solar thermal / energy research, Shipping (fuel cells, e4ships), Steel industry
- 01
Engineering for flue gas and process gas dampers and process engineering systems
- 02
Metal and stainless steel processing
- 03
Welding work / industrial boiler service
- 04
Additive manufacturing (HPEx® heat exchangers)
- 05
Assembly of systems, piping and steel structures
- 06
Maintenance, repair, emergency response
Materials & Processes
Stainless steel
Core material for heat exchangers, apparatus and system components.
Steel
Used for piping and steel structure installations as well as apparatus construction.
Additive manufacturing (HPEx®)
Production of HPEx® recuperators and heat exchangers by metallic 3D printing.
3D scanning technology
In-house scanning systems since 2021 for measurement and testing.
Locations

Kempen
DEHeadquarters / Production
- Materials
- Stainless steel, steel
- 3D scanning technology (scanning system, since 2021)
- Manufacture of thermal and process engineering apparatus
- 3D printing of HPEx® heat exchangers
Components & Systems


Inside the production


Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Additive manufacturing of HPEx® heat exchangers (3D-printed recuperator)Additive | – | – | – | – | – |
| Manufacture of thermal and process engineering apparatus and systems (recuperators,Assembly | – | – | – | – | Metal, Stainless steel |
| Welding work / industrial boiler service (including emergency repair work, e.g.Joining | – | – | – | – | – |
| Piping and steel structure installationAssembly | – | – | – | – | Steel |
| Assembly, maintenance and repair of technical systems of all kindsAssembly | – | – | – | – | – |
| Metal and stainless steel processingMachining | – | – | – | – | Metal, Stainless steel |
| Engineering (design of process engineering systems and components)Engineering | – | – | – | – | – |
| 3D scanning technology (measurement/testing)Testing | – | – | – | – | – |
| Manufacture of solar receivers (e.g. test receiver TubeMon for DLR)Assembly | – | – | – | – | – |
1 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| 3D scanning technology (scanning system) | – | – | – | 2021 | Willich/Kempen |
Additional services
Reference customers
Quality & Certification
Since 2021, the company has had its own state-of-the-art 3D scanning technology for the measurement and testing of components and systems.
| Evidence | Kempen |
|---|---|
| 3D scanning technology / measurement |
History
- 2020
Order from DLR to manufacture the test receiver TubeMon for the Multifocus Tower Jülich.
- 2021
Introduction of an in-house 3D scanning system (state-of-the-art 3D scanning technology).
- 2023
Completion of a recuperator with curved Lyra tubes; new website for additively manufactured HPEx® heat exchangers launched.
- 2025
Insolvency proceedings opened over the assets of the company (Krefeld Local Court, 26.03.2025).