
Full-range provider for thermal technology: galvanizing furnaces, enclosures, dryers and heat recovery from a single source
GEWA Wärmetechnische Anlagen GmbH
Lähden (DE)New on Amplifa
About GEWA Anlagenbau
GEWA Wärmetechnische Anlagen GmbH, based in Lähden, is a full-range provider for thermal technology specializing in plants for hot-dip galvanizing plants. The portfolio includes galvanizing furnaces as the core of the plant, enclosures to protect employees from emissions and zinc splashes, continuous and chamber dryers, heat recovery systems, and control and visualization technology. The complete thermal technology is designed and manufactured in-house, and the individual components are coordinated with one another to increase overall efficiency and conserve resources. Built in a robust, maintenance-friendly design, the company's first plants are still in operation after more than a quarter of a century. In addition to plant construction, GEWA offers services such as wall thickness measurement using ultrasonic technology, kettle changes including intermediate storage of liquid zinc, maintenance contracts and 24-hour service. The complete handling of engineering, project management, manufacturing, assembly and commissioning is provided from a single source; for overseas projects, a modular, container-compatible structure of the plants is possible.
- Site
- Lähden
- Processes
- Galvanizing furnace (manufacturing, thermal technology for galvanizing plants), Enclosure (manufacturing/assembly over the galvanizing furnace), Dryer (continuous and chamber dryers, directly/indirectly heated), Heat recovery (flue gas-air / flue gas-water heat exchangers), Control - visualization, Wall thickness measurement (ultrasonic measuring technology during operation), Kettle change (zinc pumps, intermediate storage of liquid zinc), Maintenance contracts (burner service, leak testing, flue gas analysis, among others)
- Materials
- Steel (kettle), Zinc (liquid, galvanizing bath), Steel, Zinc (liquid), Acid-resistant materials and coatings
- Certificates
- Maintenance contracts, 24-hour service, Wall thickness measurement (ultrasonic)
- Industries
- Hot-dip galvanizing plants, Thermal technology/plant engineering
- 01
Engineering/Design
- 02
Project management
- 03
Manufacturing
- 04
Assembly
- 05
Commissioning
- 06
Service & maintenance
Materials & Processes
Steel
Material for galvanizing kettles as well as foundation, insulation and structural steelwork
Zinc (liquid)
Bath material of the galvanizing furnaces; intermediate storage of up to 450 t during kettle changes
Acid-resistant materials and coatings
Used in dryers to ensure the longevity of all components
Locations

Lähden
DEHeadquarters, design, manufacturing and service
- Materials
- Steel, zinc
- 5 holding tanks for liquid zinc (electrically heated, up to 450 t)
- Zinc pumps of different delivery capacities
- Ultrasonic measuring device for wall thickness measurement during operation
Plants & Products





Inside the production









Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Galvanizing furnace (manufacturing, thermal technology for galvanizing plants)Engineering | – | – | – | – | Steel |
| Enclosure (manufacturing/assembly over the galvanizing furnace)Engineering | – | – | – | – | – |
| Dryer (continuous and chamber dryers, directly/indirectly heated)Engineering | – | – | – | – | – |
| Heat recovery (flue gas-air / flue gas-water heat exchangers)Engineering | – | – | – | – | – |
| Control - visualizationEngineering | – | – | – | – | – |
| Wall thickness measurement (ultrasonic measuring technology during operation)Testing | – | – | – | – | – |
| Kettle change (zinc pumps, intermediate storage of liquid zinc)Assembly | – | – | up to 450 t (zinc intermediate storage) | – | Zinc |
| Maintenance contracts (burner service, leak testing, flue gas analysis, among others)Testing | – | – | – | – | – |
| 24-hour serviceAssembly | – | – | – | – | – |
| Assembly and commissioning of complete plantsAssembly | – | – | – | – | – |
| Design and manufacturing of the complete thermal technologyEngineering | – | – | – | – | – |
3 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Holding tanks for liquid zinc (electrically heated) | – | 5 | Capacity up to 450 t | – | Lähden |
| Zinc pumps of different delivery capacities | – | – | – | – | Lähden |
| Ultrasonic measuring device (temperature-resistant, wall thickness measurement) | – | – | – | – | Lähden |
Additional services
Quality
The plants are manufactured in a robust, maintenance-friendly design with high-quality insulation. Ultrasonic measuring technology is used to measure the wall thickness of galvanizing kettles during ongoing operation; maintenance contracts include, among other things, flue gas analysis, leak testing and inspection of safety equipment.
| Evidence | Lähden |
|---|---|
| Maintenance contracts | |
| 24-hour service | |
| Wall thickness measurement (ultrasonic) |
History
Over 30 years of experience as a plant manufacturer; the first plants are still in operation after a quarter of a century