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Düker GmbH & Co. KGaA
Würzburger Str. 10
97753 Karlstadt, Germany
Postfach 12 60
97748 Karlstadt, Germany

Phone: +49 9353 791235
Fax: +49 9353 791175

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Company Figures
Number of employees500-999
Sales volume (in K)100-199 Mio US $
Export contentmax. 50%
Year of foundation1469
Area of business
  • Foundry plants and installations, planning, construction, engineering
  • Melting shop
  • Casting machines and pouring equipment
  • Control systems
Company ProfileShow in GermanShow in English
Cast iron since more than 500 years

Düker, a medium-sized company, is one of the leading manufacturers of valves and pressure pipe fittings for drinking water and gas supply, as well as pipes and fittings for building drainage as well as jobbing foundry in a modern hand moulding shop.

Furthermore, Düker develops and manufactures highly acid-resistant enameled components and pipes for the chemical and pharmaceutical industry, and plans and constructs complete centrifugal casting machines with the corresponding production lines and furnaces.

Düker is engaged in cast iron since more than 500 years. We develop and manufacture ideas and products – for our own sale or to customer specifications.

The Engineering department in our plant at Karlstadt projects, designs and constructs complete centrifugal casting plants with the corresponding manufacturing lines, customized to the demands of our clients. Centrifugal casting machines for pipes, cylinder liners and other parts with a circular centre bore are produced on the sector of mechanical Engineering. The Düker hot-mould-process enables the production of pressure and soil pipes without subsequent annealing. Pipes in different length and diameters can be produced on these machines. The mould change can take place with minor interruption of the working cycle. Our own department for electric control systems can regulate and control practically everything in a machine or plant so it works automatically and safely in line with the process. The only limit is the client's financial planning. Our Engineering Department does not only built new machines, we are also specialized in modernization of existing machines, beginning from the electrical control system, hydraulic and pneumatic equipment up to the exchange of machine groups.

Foundry equipment and centrifugal casting machines made by Düker are running all over the world. The collected daily practical experience in the foundry is included and delivered in our Know How.

As you will be shown, centrifugal casting is not only apt for producing pipes, but also for various other products, for example:

  • Bearings in brass – diameter 1800 mm,
  • Casting with a maximum diameter of 3 m
  • Pressure pipes for water supply and waste water
  • high alloy pipes diameter 92/33 mm, length 3.5 m
  • valve seat rings – small diameters of 30/15 mm, length 1.2 m
  • and the corresponding centrifugal casting machinery and other products made of ferrous and non-ferrous materials.

We will also present castings produced in our own foundry like ductile iron pipe fittings and valves for water and gas supply pipelines, as well as pipes, fittings and valves with acid-resistant enamel used by the chemical industry.