laser technology

Cooling of resonators, optics and laser heads.

Your laser Application
– Our Chiller

KKT is a leader among laser chiller manufacturers. KKT chillers specializes in developing and manufacturing industrial laser chillers for use in a wide range of industries and applications. Our team of innovators works with each customer to develop custom-fit laser cooling solutions. Chillers for lasers developed and manufactured by KKT provide cooling technology that functions in cooperation with leading manufacturers of CO2, disk, diode and fiber lasers, as well as for thermal processes such as laser cutting, laser welding, and additive manufacturing processes such as 3D printing. Because no two applications are alike, all KKT’s chiller model series are modular systems with a wide range of options and equipment that easily adapt to the unique requirements and specifications of each project. If necessary, KKT’s engineers can even integrate chillers into the casings of lasers or machines for a truly custom solution.

KKT chillers is committed to providing each customer with exactly the right cooling system. To meet this goal, we offer our customers ‘Resident Engineering’ services: from the very beginning of each project, our engineers contribute their cooling expertise to each stage of the development process. This hands-on approach regularly helps achieve substantial efficiencies and savings for the complete facility.

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Laser Technology Applications

See how our chillers have been employed to assist with laser technology applications in the real world


Metal laser melting: this melting process generates components layer by layer, using 3D CAD data.


Cooling of the laser head of the fiber laser of one of the largest laser melting facilities (up to 160l construction volume) for the patternless production of large functional components or prototypes. The laser melting facility applies 2 fiber lasers, each with a 1,000 W output.




The technical task to be solved was to plan and produce a chiller, which could cover the cooling output of 2 lasers at a high control accuracy and allow for the global utilization with any application. The laser melting facility and the chiller should be provided to the end customer as a plug-and-play solution, with customer-specific water connections for the laser and optic circuits as well as the monitoring of the flow-rate measurement for the optic circuits as part of the design. Further requirements included an Anybus gateway communication interface for Modbus as well as the use of refrigeration components with UL approval.


The solution developed by KKT chillers is a water-cooled vBoxX 6, designed as a plug-in chiller, which can be inserted into the laser melting facility via telescopic rails. Thanks to a speed-controlled compressor, the cooling output adapts automatically to the load profile of the laser melting facility within a range of 2.5-5 kW, with a control accuracy of +/-1 K. The back of the vBoxX 6 is equipped with a connection panel for water and electrical connections. The solution features a dual-frequency design (50/60 Hz) suitable for utilization worldwide.

End Product:

Functional parts with sophisticated geometries and defined aero-dynamic or fluid-dynamic properties can be manufactured very quickly and cost-efficiently using the powerful laser melting machines from Concept Laser. They include fuel systems, guide blades and rotor blades, attachment systems and special heat protection components. Parts for engines and turbines, rocket elements, test vehicles and high-quality components for equipping the cabin and cockpit (interior) are other typical applications.

The generative metal laser melting process can be used to produce engine components, bodywork and structural parts as well as direct components for use inside vehicles precisely, economically and quickly.


After the technical testing of the entire system (laser melting machines and chiller) at the customer’s plant the start-up follows by trained service technicians at the end consumer’s plant.


Laser Perforating: Laser Cutting of airbags


Cooling of laser accessories of a CO2 laser.

Installation Site:



Two water circuits: 20°C for the laser circuit and 28°C for the optics circuit in one system with a temperature constancy of +/- 1K.


Air cooled cBoxX 70 (cooling capacity 68 kW) including pumps for the laser and optics circuits, 3 way valve, tank heater and phase monitoring in according to UL.

Product For Use:

Airbags for the automotive industry.


For a smooth customer’s start-up, the systems are produced as a plug-and-play solution.


Laser Technology more specifically a welding solution with laser, robot arm and chiller.


Cooling of the diode laser.


Ohio, USA


The technical requirements were to cool two parts of the laser – the optics as well as the power meter.


vBoxX 12 (12 kW) with dual circuit

Parts and Components of the End-User:

The welding system finds use for example in the following areas:
– Aluminum welding in the automotive industry for the production of Aluminum Trunk Lids
– Heat conduction welding of stainless steel sinks


Indoor installation in August 2015 by the KKT chillers, Inc. service technician.