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Düker GmbH & Co. KGaA is a medium-sized company with a tradition of a smeltery and hammer mill. Today there are four divisions: fittings and valves, drainage technology, glasslining technology and jobbing foundry.
With cast iron products, Düker is one of the leading manufacturers of valves and pressure fittings for the drinking water and gas supply as well as of pipes and fittings for the drainage systems.
Furthermore the development and production of acid-proof enamelled components and pipes for the plant engineering of the chemical and pharmaceutical industry belongs to the core competence of Düker.
In the Lower Franconian locations Karlstadt and Laufach there are around
650 employees with an apprenticeship rate of approximately 8%. So Düker is one of the biggest German iron foundries.

Manufacturing products that satisfy even the highest customer requirements has been the source of Hawle Armaturen GmbH's motivation for over 40 years now.
Production:
Duktil Guss Fürstenwalde the company's in-house foundry, is where high-quality unfinished castings are manufactured. The cast material is then processed in Freilassing using the latest CNC production systems. Following an aggressive bout of abrasive blasting, the EWS coating - an epoxy powder coating manufactured using a fluidised bed sintering process - is melted onto the heated casting surface. The use of industrial robots during this ensures an even layer thickness (at least 250 µm*). Hawle even produces its own elastomer/plastic components required for the final assembly process. Before shipping, all products are subjected to a rigorous final inspection procedure.

Cast iron components
Our foundries produce nodular and ductile cast iron components between 0.1 and 200 kg in the materials EN-GJL and EN-GJS. In addition, we manufacture various special alloys for a large number of well-known customers in Europe and worldwide.

Stainless steel and steel components
In our production facility near Augsburg, we manufacture components from various materials such as stainless steel alloys and steel. Laser cuts, punched parts and complex components. We also manufacture stainless steel in qualities such as 1.4016, 1.4301 and 1.4571.

Building materials
The building materials business unit has been an essential part of the ZÜRN group of companies for almost 60 years. Our aim is to be a reliable and competent supplier and partner for our customers in the field of road construction and civil engineering.