Well proven anti-corrosion techniques for prevention of corrosion in boilers, filter vessels, storage tanks and pipe systems. A variety of high quality solutions to control corrosion.

  • Cathodic protection
  • Electrolysis
  • Katolysis


Total supplier of solutions and equipment for commercial and industrial water treatment.

  • Desalination
  • Filtration
  • Softening
  • Rehardening
  • Demineralization
  • Ultrafiltration
  • Bacteria control


Guldager recognizes the need for strong technical support and after sales service. Our world wide service includes spare parts availability, repair and current optimization.



On the basis of our comprehensive product line, we provide complete customized solutions. We use the technology of our standard products in combination to offer unique, complete solutions


The Guldager group of companies provides a variety of products and solutions to the professional water treatment market.
At Guldager, we believe that water should be treated respectfully and in harmony with the laws of nature and our environment.
We call this philosophy Wise Water Treatment.


Guldager is a Danish family owned company. The company was founded in 1946 and is today a modern company, represented internationally through subsidiaries, agents and dealers. We apply decades of experience, up-to-date knowhow and cutting-edge technology to meet the many needs of our customers.


Guldager A/S is an international company committed to its customers. We are used to provide service and support to our customers all over the world. Please feel free to contact any member of the Guldager team, we are looking forward to hearing from you.

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Copyright Guldager A/S 2013
GULDAGER A/S HEJREVANG 1-5 DK-3450 ALLERØD +45 48 13 44 00