Industrial water chiller



Efficient, reliable industrial recooling

  • Power range: 5 - 320 kW
  • Application: Water
  • Plug & play: Stand-alone plug & play solution 
  • Compact: 5 - 28 kW on 0.5 m²; up to 160 kW cooling power in only 2 m²
  • Optimized: Optional equipping with FleXX technology ensures optimized operation and additional control options
  • Flexible: Numerous options available for individualization and efficiency optimization

The models of the HYFRA Sigma series are suitable for all applications that use cooling water as a medium. The chillers' compressors always operate at optimum efficiency and the plate heat exchangers are highly efficient. This leads to considerable savings in energy consumption. In conjunction with microchannel technology, the demand for refrigerant is also reduced by up to 70 percent.

In chillers with microchannel technology, the refrigerant flows through numerous microchannels. The many small channels increase the surface for heat exchange with the medium to be cooled. At the same time, less refrigerant flows because of the small diameter of the channels. The result is not only a permanent reduction in the amount of refrigerant required, but also a better ecological balance.

As a result of the low refrigerant requirement, there is no need for an annual leak test for coolers with a capacity of up to 30 kW. This noticeably reduces the costs for the maintenance of the chiller. During operation, a 2-point pressure transducer increases the safety of the system. It ensures a constant system pressure and gives an early warning of leaks.

Proven cooling for numerous industrial applications

How does a water chiller operate?

Cooling water recoolers bring water in the device to process temperature and make it available in a tank for further use. A pump delivers the cooling medium to the consumer. There the cooling water extracts its heat from the process and then transports it back to the chiller.

In which applications are water chillers suitable?

Cooling water is indispensable in many industrial processes. Cooling water recoolers are often used in laser processing. There, they are used for the temperature control of the optics, the laser source and other components. Other applications are the cooling of tools in plastic injection molding and power electronics.

Various controls with a wide range of functions

The coolers of the HYFRA Sigma series are delivered with either the FreeSmart or the FreeAdvanced control, depending on the capacity. Both controls are freely programmable and have several analog and digital connections. The combination of the FreeAdvanced control and a touch panel provides a structured overview and makes it easier to read the relevant values. In addition, this controller has a full text display as standard and is Modbus-TCP compatible.

The HYFRA Sigma is available in six FleXX variants with different performance ranges. Models with the HYFRA FleXX technology operate components such as the fan, expansion valve, and compressor depending on the specific requirements. A PLC control system permanently measures the heat load of the application and varies the capacity of the chiller on this basis. This allows the temperature to be regulated with an accuracy of 0.1 Kelvin. With this technology, the units can be adapted at any time to different market or production requirements. As a result, the flexible cooling system reduces energy costs by up to 30 percent. It also significantly reduces refrigerant requirements, wear and tear, life cycle costs, and the noise level of the system.

With the help of numerous options, the models of the HYFRA Sigma series can be adapted exactly to the requirements of your application. For special applications, we can also work with you to design and develop a completely individual refrigeration system from scratch. Whether planning, installation or acceptance - you will receive all related services from us, including material supply and project management. This saves you long coordination with several suppliers and your system is ready for operation more quickly.

If you already own a HYFRA cooler and your production process changes, we are also there
for you. In this case, we will put together a custom-fit modification kit for you, with which the chiller can be operated under the changed conditions.

HYFRA Sigma c

The small water chiller for flexible recooling

  • Power range: 5 - 16 kW
  • Application: Water
  • Profitable: Entry-level model; can be upgraded as required
  • Small: Up to 70% lower than the Sigma series
  • Plug & play: Ready for immediate use

Our Sigma c series for cooling water offers reliable cooling capacity of up to 16 kW in a compact design. Designed to save space, they are up to 40 % lower than the standard models in the Sigma series. As an entry-level air cooled water chiller,  it also uses our energy-efficient HYFRA microchannel technology, which uses up to 70 % less refrigerant. The frame is made of durable stainless steel.
The attached control cabinet is equipped with an ST120 controller that reliably monitors compression pressure and temperature. Equipment options – for example, reinforced pumps and variable frequencies or voltages – are available upon request.


To keep your chiller always ready for operation, we also take care of its maintenance. In our service packages you will find services for periodic maintenance and also a special check for commissioning after a longer break.


Should a malfunction occur during the operation of your cooler, you will always receive quick help from an experienced technician. With our worldwide HYFRA service network, we can solve the problem reliably at any location.

Online Store

If you need a HYFRA spare part, as a customer you can order it worldwide on the myHYFRA online platform. On the site you will find many quickly available components for older and new coolers in OEM quality. The search for suitable components is supported by the machine number search function, so that you can always get the exact spare part for your chiller.


Phone: 02687/898 0


Phone: 02687/898 0


Phone: 02687/898 0