Branded products from FRYKA
Circulation cooler or recirculating cooler for laboratory, research, and industry
FRYKA develops and manufactures high-quality Recirculating chillers or recirculating coolers for reliable process cooling in laboratories, production, and industry. The devices enable stable circulation cooling of liquids and ensure constant temperature conditions in technical applications.
With cooling capacities from 0.4 to 4.5 kW, FRYKA circulation coolers are suitable for a wide range of cooling tasks, from compact laboratory circulation coolers to powerful process coolers for industrial applications.
- Temperature control for stable process conditions
- Compact design for laboratory and production environments
- Especially quiet operation for use directly at the workplace
- Development and manufacturing at the Esslingen site

Circulation cooler / Recirculating cooler
Technical features at a glance
Circulation coolers (ULK devices) are used wherever processes or devices need to be reliably cooled. Typical applications include laboratory equipment, production facilities, or technical test stands.
The devices operate with a closed cooling circuit: An integrated pump continuously circulates the coolant through the connected process and dissipates the generated heat via the cooling system.
Our recirculating coolers enable safe process cooling with high energy efficiency and long-term operational reliability.
Key features of modern circulation coolers from FRYKA:
- Temperature ranges from minus 10 °C to plus 40 °C
- Cooling capacities from 0.4 to 4.5 kW
- Integrated recirculating pump for continuous circulation cooling
- Stable temperature control for laboratory and process applications
- Compact design for easy integration into existing systems
- Quiet operation for use in laboratory or production environments
Standard devices or custom adaptation?
Many applications can be realized with proven FRYKA brand products. The devices are designed to be flexibly integrated into different cooling processes.
For special requirements, various options and device variants are available, for example, in terms of pump performance, interfaces, or mechanical integration into existing systems. Such adaptations are made within the framework of series or OEM solutions with series character.
This creates solutions that are optimally oriented to the needs of your specific cooling process.
Product overview circulation coolers
Quickly find the suitable FRYKA circulation or recirculating cooler for your application
Our brand products cover a wide performance range and are suitable for a variety of cooling tasks in laboratories and industry.
Über Filter lassen sich die Geräte gezielt nach Kälteleistung, Pumpendaten sowie nach typischen Anwendungsbereichen auswählen. So lässt sich schnell der passende Umlaufkühler für Laborgeräte, technische Anwendungen oder industrielle Prozesse finden. Alle Modelle zeichnen sich durch benutzerfreundliche und kompakte Bauweise und einen zuverlässigen Dauerbetrieb aus.
Our team supports you in selecting the appropriate brand product. Together, we consider your requirements and application conditions. Many applications can already be covered by available options of the series devices. If there are further requirements and corresponding quantities are planned, a OEM variant with series character can also be sensible.
FRYKA brand products
Device series for different cooling tasks
In the area of circulation coolers or recirculating coolers, you will find proven standard devices in three different series:
PocketChiller
Compact circulation coolers for versatile applications
PocketChiller are particularly space-saving and lightweight circulation coolers for a wide range of cooling tasks in laboratories, research, production, and industry with low cooling capacity. Due to their compact design, they can be flexibly integrated directly next to devices, on work surfaces, or in technical setups.
Special features of this device series are its compact size, low weight, energy-efficient operation, and versatile applicability in a wide range of applications.
Typical areas of application:
- Tool cooling
- Liquid handling systems
- Analytical devices
- Small test stands


ProChiller
High-quality recirculating chillers for demanding applications
ProChiller devices are high-quality recirculating chillers for demanding applications in research, life sciences, medical technology, and analytical laboratories. They combine high cooling performance with particularly quiet operation, user-friendly handling, and high operational safety in continuous operation.
The series is designed for applications where reliable cooling, comfortable operation, and flexible deployment options are required. Various options allow the devices to be adapted to different requirements, such as pump performance, interfaces, or control functions.
Typical applications:
- Rotary evaporators
- Laboratory reactors
- Analytical devices and measurement systems
- Biotechnological applications
- Life sciences and medical technology
PowerChiller
Robust process chillers for industrial applications
PowerChiller are robust recirculating chillers for use in industrial applications and technical systems. The devices combine powerful technology with proven components and a stable design. Stainless steel housings and a functional device concept ensure high reliability in daily operation as well as an impressive price-performance ratio.
The series is particularly suitable for applications in production and technology where reliable and economical process cooling is required.
Typical applications:
- Production facilities
- Laser systems
- Injection molding machines
- Test stands

What distinguishes FRYKA recirculating chillers
Ice cold green
Sustainable and economical cooling
FRYKA recirculating chillers use modern cooling systems with natural refrigerants and energy-efficient components. The devices provide an economical alternative to cooling with tap water and help conserve resources.
Advantages of modern recirculating chillers
- Lower operating costs compared to flow-through cooling with tap water
- Energy-efficient fans and cooling systems
- Low greenhouse potential of modern refrigerants
- Long-term available and future-proof technology
Natural refrigerants have a significantly lower greenhouse potential compared to many synthetic and fluorinated alternatives. Thus, our recirculating chillers already meet future environmental requirements – efficiently, economically, and resource-conserving.

Technical quality and manufacturing
Through in-house development and high manufacturing depth, design, production, and quality inspection are closely coordinated. This ensures consistently high series quality and long-term spare parts supply.
FRYKA develops and manufactures its cooling devices at the Esslingen (Baden-Württemberg) location. Design, production, and quality inspection are all handled in-house. This includes:
- High-quality brand components
- Robust housing constructions
- Testing of each device before delivery
- Quality management according to DIN EN ISO 9001
The selection of a suitable recirculating chiller depends on several technical and economic factors:
- Required cooling capacity of the process
- Necessary temperature range
- Flow rate and pressure of the circulation pump
- Integration into the existing cooling circuit
- Operating conditions in the laboratory or production environment
A technically appropriate design ensures not only stable process conditions but also economical operation of the system. FRYKA provides application-specific and transparent advice. The goal is a technically sensible and economically suitable solution for your specific application.






FAQ: Frequently Asked Questions & Answers about FRYKA Recirculating Chillers
Here you will find answers to frequently asked questions about the selection, functionality, and use of industrial and laboratory recirculating chillers.
A recirculating chiller (ULK), also known as a circulation chiller, is a cooling system for closed cooling circuits. The device cools a liquid and continuously pumps it through an attached process or technical device. The heat generated there is dissipated in the recirculating chiller, and the cooled liquid is returned to the circuit.
This form of recirculating cooling is often used to reliably temper laboratory equipment, production facilities, or technical processes. Typical applications include rotary evaporators, laser systems, bioreactors, or test stands.
In contrast to cooling with tap water, a recirculating chiller allows for controlled temperature management, reduces water consumption, and ensures stable operating conditions in continuous operation.
A recirculating chiller operates with a closed cooling circuit, enabling reliable recirculating cooling. An integrated circulation pump moves the cooling liquid through the connected system, such as a laboratory device or industrial facility. The liquid absorbs the generated heat and transports it back to the recirculating chiller.
Within the device, the liquid is cooled back to the desired temperature. It is then pumped back into the circuit. This continuous circulation ensures that connected processes can be consistently cooled at a constant temperature.
This recirculating chiller functionality allows both small laboratory devices and complex technical applications to be reliably tempered.
FRYKA recirculating chillers are delivered as standard with a suitable tempering liquid. This ready-to-use mixture contains antifreeze components and is formulated to protect the materials used in the chiller while supporting reliable pump operation. The liquid is non-flammable, not hazardous, and not harmful to health, making it suitable for safe use in laboratory and industrial environments.
Depending on the application, other suitable cooling liquids can also be used in principle. Circulating coolers are often operated with water or water-glycol mixtures. Such systems are often referred to as water circulating coolers. The specific choice of cooling liquid depends, among other things, on the desired temperature range, the materials in the circulating cooler and the connected system, as well as the operating conditions.
For applications with temperatures below freezing, suitable antifreeze mixtures must be used to prevent the cooling liquid from freezing.
The required cooling capacity of a circulating cooler mainly depends on the heat load of the connected process. Key factors include the dissipated process heat, the desired temperature of the cooling liquid, and the ambient temperature at the installation site.
In practice, circulating coolers are designed to have sufficient power reserve. This ensures that the temperature remains stable even under changing load conditions and the cooler operates in an energy-efficient range.
FRYKA circulating coolers cover different performance ranges depending on the model and can thus be adapted to the respective application in the laboratory or industry.
Circulating coolers are used wherever devices or processes need to be continuously cooled. Typical areas of application are found both in laboratories and in industrial applications. Industrial circulating coolers, for example, cool injection molding machines, laser processing systems, and CNC machines. Circulating coolers for laboratories and research ensure precise cooling of components such as mass spectrometers, condensers, reactors, or biotechnological systems.
Further application examples:
- Rotary evaporators and laboratory reactors
- Laser systems and optical systems, such as electron microscopes
- Bioreactors and analytical devices
- Automated liquid handling systems
- Test benches and measuring systems
- Industrial production processes
Due to their stable temperature control and closed cooling circuit, circulating coolers are particularly suitable for applications where reliable and reproducible process cooling is required.
Contact us now!
We advise you on selecting the right cooling device
Whether circulating coolers or recirculating coolers for laboratory equipment, process coolers for industrial applications, or a custom-tailored solution: We support you in selecting a technically and economically suitable cooling device for your application.
Together, we clarify the key parameters such as required cooling capacity, temperature range, pump performance, and integration into the existing cooling circuit. This results in a solution that functions reliably and can be operated economically in the long term.
Your advantages with FRYKA circulating coolers:
- Stable temperature control for laboratory and process applications
- Durable devices with high-quality brand components
- Development and manufacturing at the Esslingen site
- Direct technical advice and support from the manufacturer







