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Kröger Druck: Spark suppression for filter systems in the printing industry

How GreCon spark detectors and automatic extinguishing systems detect and extinguish ignition sources in the extraction system – before they reach the filter unit.

  • Published 10 April 2026

Digitising and internet intensify competition in the printing trade. Therefore, flexibility and supplier’s reliability are important factors of success. Neverthelss, problems could arise if the supplier’s reliability is put at risk by a fire in the filter system.

“The real cost of fires is not the damage to property, but the loss of production and potential loss of customers. The swift and solution-oriented cooperation with GreCon’s customer service was a great help to us. An initial ignition was detected and successfully extinguished. The spark suppression system gives us the assurance that no sparks will enter the filter system, sparing us a fire incident like the one last autumn.”Matthias Greve | Team Leader, Print/Finishing, Kröger Druck

Our solution for Kröger Druck

Risks of fire and explosion

After printing, the print products are processed. Especially the mechanical trimming of the sheet edges holds a risk. Foreign objects or friction can cause sparks or overheating. Ignition sources can be transported via the extraction system to the filter where they meet an explosive dust-air mixture.

Spark extinguishment for Kröger Druck

After a fire in the filter, an appointment was made on short notice. After the technical clarification, the spark extinguishing system was ordered for a turnkey supply. Besides the mounting of equipment, turnkey projects also include the installation of electrical cables and water pipes. The spark extinguishing system protects the exhaust duct leading to the filter so that a fire like in the previous year is prevented. For this purpose, the material transports from the shear blade and the rotary blade are monitored.

Technical details of our solution

  • Control console CC 5004 with touch & slide operation
  • 3 automatic extinguishing devices
  • Overall 8 spark detectors FM 1/8
Trimming the margins of printed materials.Spark extinguishing system.Various printed materials on a wall Printed magazines ‘fly’ along so-called clamp conveyors beneath the hall ceiling for further processing.
The premises of the client, Kröger Druck
The premises of the client, Kröger Druck

About Kröger Druck, Wedel/Germany

The family business that was founded in Wedel in 1879 offers a large range of print products, such as inserts, brochures, catalogues or magazines. Flexibility and timely despatch are the factors of success.