High quality for granted

High demands on product quality, in some cases from sensitive areas of application, imply appropriate standards in all process stages, development, production and service. Düker satisfies these demands at all levels. In 1993 Düker introduced a modern quality management system to DIN EN ISO 9001, which is certified by TÜV CERT. In addition, the company operates under the terms of other approvals and regulations, some of which are product or market-specific. Regular and random tests, internal and external audits, as well as the employees’ motivation ensure that the QM system is constantly being developed as an integral part of the organisation as a whole. This means that in the future as well, we will supply products that stand out as a result of their long useful life and comply with the latest state of the art.

Our products are made of pressure-tight cast iron for gas and water supply as well as for drainage pipeline technology. We cast particular components according to individual wishes and carry out the surface finishing. This requires repeatable production process stages and checkable quality standards.

DÜKER ist certified to DIN EN ISO 9001:2008                       
Supervision of process and production by DVGW and FGR

The quality management of Düker contains:

• Constant training of our staff
• Tests of raw material
• Spectral analyses of materials
• Physical tests 

         o Tensile tests to DIN 1563

         o Impact test to DIN 50 155

         o Brinell hardness test to nach DIN 50351

• Metallographic analyses
• Ultrasound test
• Supervision of unit geometry and dimensional accuracy
• Continuous monitoring of current processes
• Since 1993 TÜV CERT DIN EN ISO 9001
• Test of core sand and foundry sand