RKV Series industrial coolers
Cooling capacity 9.3 kW to 147 kW
Compact cooling units and refrigeration systems for the medium capacity range
The industrial cooling systems of the RKV Series consist of the components refrigerant circuit, water circuit and electrical engineering – completely installed in one housing.
The basic version is equipped ready for connection and operation, in air-cooled design for frost-free indoor installation.
Individually configurable and expandable according to customer specifications.
Circulating media
Water 
Emulsion 
Oil
Flow temperature range
0 – 40 °C
Quality and performance features of RKV recooling systems
Efficiency in the smallest space.
- Wide range of options due to flexible modular principle
- Individual and application-specific configuration optimised for a wide range of customer requirements, e.g. special voltages, higher ambient temperatures, multi-circuit system, interface connection, etc.
- Easy integration into the production layout due to smallest dimensions and individual colour selection
- Available as stand-alone or built-in unit
- High precision control
- Automatic power adjustment
- Standard temperature stability +/- 1 K
- On request, flexible control and temperature precision by ACC-control possible up to +/- 0.02 K
- Also available as continuous-flow cooler or passive cooling system (heat exchanger)
Main applications:
Laser, welding and tooling technology, cooling of lathes, milling, grinding and eroding machines, cooling of spindles, machine beds and electronics
- Compact device tested by us in-house, in test run lasting several hours
- Compact interior housing for inside installation
- Device standing on wheels (RKV 1.5 - RKV 10.5)
- Device standing on tracks (RKV 11.5 - RKV 18.5)
- Painted in RAL 7012
- Air-cooled condenser with copper pipes and aluminium lamellae, extremely efficient
- Axial fan, extremely low-noise and maintenance-free with contact protection
- CFC-free coolant
- Hermetic compressor, 100 % suction-gas cooled
- Evaporator as plate heat exchanger or pipe coil heat exchanger
- Thermostatic expansion valve for coolant injection
- High and low-pressure switch
- Water circuit with tank, pump, manometer, pump bypass
- Automatic water filling via float gauge
- Piping of the water circuit made from stainless material (iron-free)
- Water tank made from plastic, heat-insulated
- Pumps made from bronze or stainless steel
- Digital controller with target and actual value display
- Switching and control elements completely wired
- External on/off switching
- Potential-free collective fault indicator
- Automatic power adjustment
- Optical water level display
- CE-compliant
- Cooling technology designed according to EN 378 part 2
- Electronics designed according to EN 60204
- RoHS and REACH-compliant
- Outdoor installation
- Air filter mat
- Radial fans
- Split design
- Water-cooled condenser
- Low-noise design
- Cold fluid outlet temperature < +8 °C
- Water temperatures up to 40 °C
- Temperature stability ± 0.2 K
- Refrigeration gauge for high and low-pressure side
- Overflow valve
- Fixed bypass
- Multi-circuit system
- Heat recovery
- Flow monitor with analog or digital signal
- Water filter
- Gate valves in flow and return
- Tank filling, pressureless, from outside
- Automatic water refilling
- Tank heating for temperature control
- Check valves and solenoid valves for the water circuit
- (consumer higher than coolant)
- Water circuit made from stainless or PVC for deionised water
- Conductance monitoring
- Pump switch-off
- Air filter mat monitoring
- Wire marking
- Continuously variable speed regulation of the fans
- Heavy-duty connector (e.g. Harting)
- 24 V AC/DC control voltage
- Special voltages and frequencies (50/60 Hz)
- Limit temperature monitoring
- Differential temperature control
- External temperature sensor
- Cabinet heating, cabinet fan
- Bus connection, e.g. profibus DP
- Individual fault indicators (in the plain text display or as bit technology)
- RAL special colours upon request
| Series type RKV | Unit | 1.5 | 2.5 | 3.5 | 4.5 | 5.5 |
|---|---|---|---|---|---|---|
| Cooling performance at | ||||||
| Water inflow | kW | |||||
| +10 | °C | 6,4 | 7,6 | 9,0 | 11,0 | 13,9 |
| +15 | °C | 7,8 | 9,2 | 10,9 | 13,0 | 16,5 |
| +20 | °C | 9,3 | 11,0 | 13,0 | 16,0 | 19,7 |
| Compressor drive | kW | 1,7 | 2 | 2,4 | 2,9 | 3,5 |
| Air capacity | m³/h | 4500 | 4500 | 4500 | 4500 | 4500 |
| Number of fans | 1 | 1 | 1 | 1 | 1 | |
| Pump capacity | m³/h | 1,2 | 1,5 | 1,8 | 2,2 | 2,7 |
| Pump drive | kW | 0,65 | 0,65 | 0,65 | 0,65 | 0,65 |
| Pump pressure | bar | 4 | 3,9 | 3,6 | 3,4 | 3,1 |
| Connection capacity | kW | 3,2 | 3,5 | 3,9 | 4,4 | 5 |
| Tank contents | l | 60 | 60 | 60 | 60 | 60 |
| Water connections | DN | 25 | 25 | 25 | 25 | 25 |
| Dimensions about | ||||||
| Width | mm | 600 | 600 | 600 | 600 | 600 |
| Length | mm | 600 | 600 | 600 | 600 | 600 |
| Height | mm | 1980 | 1980 | 1980 | 1980 | 1980 |
| Empty weight: about | kG | 165 | 190 | 220 | 240 | 260 |
| Series type RKV | Unit | 6.5 | 7.5 | 8.5 | 9.5 | 10.5 |
|---|---|---|---|---|---|---|
| Cooling performance at | ||||||
| Water inflow | kW | |||||
| +10 | °C | 18,0 | 22,0 | 25,0 | 29,0 | 33,0 |
| +15 | °C | 22,0 | 27,0 | 30,0 | 35,0 | 40,0 |
| +20 | °C | 26,0 | 32,0 | 36,0 | 42,0 | 48,0 |
| Compressor drive | kW | 4,7 | 5,5 | 6,2 | 7,2 | 8,2 |
| Air capacity | m³/h | 12000 | 12000 | 12000 | 12000 | 15900 |
| Number of fans | 1 | 1 | 1 | 1 | 1 | |
| Pump capacity | m³/h | 3,7 | 4,6 | 5,1 | 6 | 6,8 |
| Pump drive | kW | 1,2 | 1,2 | 1,2 | 2,3 | 2,3 |
| Pump pressure | bar | 3,8 | 3,4 | 3 | 2,8 | 2,4 |
| Connection capacity | kW | 7,1 | 7,9 | 8,6 | 10,7 | 12,1 |
| Tank contents | l | 150 | 150 | 150 | 150 | 150 |
| Water connections | DN | 40 | 40 | 40 | 40 | 40 |
| Dimensions about | ||||||
| Width | mm | 750 | 750 | 750 | 750 | 750 |
| Length | mm | 750 | 750 | 750 | 750 | 750 |
| Height | mm | 1980 | 1980 | 1980 | 1980 | 1980 |
| Empty weight: about | kG | 315 | 325 | 350 | 390 | 480 |
| Series type RKV | Unit | 11.5 | 12.5 | 13.5 | 14.5 | 15.5 |
|---|---|---|---|---|---|---|
| Cooling performance at | ||||||
| Water inflow | kW | |||||
| +10 | °C | 37,0 | 43,0 | 50,0 | 58,0 | 68,0 |
| +15 | °C | 45,0 | 51,0 | 60,0 | 71,0 | 82,0 |
| +20 | °C | 55,0 | 62,0 | 72,0 | 84,0 | 98,0 |
| Compressor drive | kW | 9,3 | 11,1 | 12,4 | 14,4 | 16,2 |
| Air capacity | m³/h | 31800 | 31800 | 31800 | 31800 | 31800 |
| Number of fans | piece | 2 | 2 | 2 | 2 | 2 |
| Pump capacity | m³/h | 7,8 | 8,6 | 10,3 | 12,2 | 13,8 |
| Pump drive | kW | 2,3 | 2,3 | 4 | 4 | 4 |
| Pump pressure | bar | 3,3 | 3 | 5,3 | 5 | 4,5 |
| Connection capacity | kW | 14,8 | 16,6 | 19,6 | 21,6 | 23,4 |
| Tank contents | l | 200 | 200 | 200 | 200 | 200 |
| Water connections | DN | 40 | 40 | 40 | 40 | 40 |
| Dimensions about | ||||||
| Width | mm | 750 | 750 | 750 | 750 | 750 |
| Length | mm | 1500 | 1500 | 1500 | 1500 | 2250 |
| Height | mm | 2010 | 2010 | 2010 | 2010 | 2010 |
| Empty weight: about | kg | 580 | 590 | 610 | 630 | 650 |
| Series type RKV | Unit | 16.5 | 17.5 | 18.5 |
|---|---|---|---|---|
| Cooling performance at | ||||
| Water inflow in | kW | |||
| +10 | °C | 75,0 | 87,0 | 102,0 |
| +15 | °C | 91,0 | 105,0 | 120,0 |
| +20 | °C | 108,0 | 126,0 | 147,0 |
| Compressor drive | kW | 18,6 | 21,6 | 24,3 |
| Air capacity | m³/h | 47700 | 47700 | 47700 |
| Number of fans | piece | 3 | 3 | 3 |
| Pump capacity | m³/h | 15,7 | 18 | 21 |
| Pump drive | kW | 4 | 4 | 4 |
| Pump pressure | bar | 4,2 | 4 | 3,5 |
| Connection capacity | kW | 27,4 | 30,4 | 33,1 |
| Tank contents | l | 400 | 400 | 400 |
| Water connections | DN | 50 | 50 | 50 |
| Dimensions about | ||||
| Width | mm | 750 | 750 | 750 |
| Length | mm | 2250 | 2250 | 2250 |
| Height | mm | 2010 | 2010 | 2010 |
| Empty weight: about | kg | 820 | 850 | 890 |
Water temperature range: from +8 °C to +25 °C (other ranges on request)
Type of cooling: air-cooled using axial fan (water-cooled or using radial fan on request)
Electrical connection: 3x400 V PE 50 Hz (other voltages and frequencies on request)
Designed ambient temperature: +32 °C (higher and lower temperatures on request)
Range of application of the industrial cooler: from +8 °C to +42 °C ambient temperature (higher and lower temperatures on request)
Circulation medium: drinking water (according to specification) with a spread of about 5K between water inlet and outlet (other ranges on request)
Technical modifications and errors reserved
- Compact device tested by us in-house, in test run lasting several hours
- Compact interior housing for inside installation
- Device standing on wheels (RKV 1.6 - RKV 10.6)
- Device standing on tracks (RKV 11.6 - RKV 16.6)
- Painted in RAL 7012
- Air-cooled condenser with microchannel technology
- Axial fan, extremely quiet and maintenance-free, with touch protection; with EC technology depending on performance class
- CFC-free refrigerants with low global warming potential
- Hermetic compressor, 100 % suction-gas cooled
- Evaporator as plate heat exchanger
- Expansion device for optimum refrigerant injection
- Intrinsically safe refrigeration circuit
- Air filter mat
- Pump bypass valve for system protection
- Manual medium filling via filler neck
- Visual medium level indicator
- Medium circuit piping made of corrosion-inhibiting materials (depending on medium)
- Medium container made of plastic, thermally insulated
- Stainless steel pump
- Digital temperature controller with setpoint and actual value display
- Switching and control elements fully wired
- External on/off switch
- Potential-free collective fault signal
- Medium temperature adjustable from +8 °C to + 25 °C
- Operating range from +8 °C to +42 °C ambient temperature
- Tank emptying
- Outdoor installation
- Fans with air duct connection
- Split design
- Water-cooled condenser
- Noise-reduced design
- Refrigeration pressure gauge for high and low pressure sides
- Medium temperature < + 8 ºC
- Medium temperature up to 40 °C
- Increased temperature stability ± 0.5 K/ 0.1 K/ 0.02 K
- Multi-circuit system
- Heat recovery
- Fixed bypass
- Pump pressure gauge
- Flow monitor with analogue or digital signal
- Medium filter
- Shut-off valve in flow and return
- Automatic tank filling via mechanical
- float switch
- Automatic tank filling via solenoid valve
- Tank heating for temperature control
- Check valve and solenoid valve for the water circuit (consumer higher than cooler)
- Reinforced pump
- Water circuit made of stainless steel or PVC for deionised water
- Conductivity monitoring
- Air filter mat monitoring
- Stepless speed control of the fans
- Wire target marking
- Heavy-duty connectors (e.g. Harting)
- 24 VDC control voltage
- Special voltages and frequencies (50/60 Hz)
- Limit temperature monitoring
- Reference temperature control
- External temperature sensor
- Control cabinet heating
- Control cabinet fan
- Bus connection, e.g. Profibus DP / Ethernet / Profinet / Modbus TCP
- Individual fault indicators (in plain text display or as bit technology)
- RAL special colour of your choice
- Level monitoring with signal contact and/or optical signalling
- Installation feet
| Series type RKV | Unit | 1. | 2.6 | 3.6 | 4.6 | 5.6 |
|---|---|---|---|---|---|---|
| Cooling performance at | ||||||
| Water inflow | kW | |||||
| +10 | °C | 6,3 | 7,4 | 9,4 | 10,6 | 13,3 |
| +15 | °C | 7,8 | 9,0 | 11,2 | 12,8 | 15,9 |
| +20 | °C | 9,1 | 10,7 | 13,3 | 15,3 | 18,8 |
| Compressor drive | kW | 1,8 | 2,0 | 2,5 | 2,8 | 3,5 |
| Air capacity | m³/h | 4500 | 4500 | 4500 | 4500 | 4500 |
| Number of fans | 1 | 1 | 1 | 1 | 1 | |
| Pump capacity | m³/h | 1,2 | 1,5 | 1,8 | 2,2 | 2,7 |
| Pump drive | kW | 1,3 | 1,3 | 1,3 | 1,3 | 1,3 |
| Pump pressure | bar | 4 | 3,9 | 3,6 | 3,4 | 3,1 |
| Connection capacity* | kW | 5,1 | 5,1 | 5,7 | 6,0 | 6,9 |
| max. Connection capacity | kW | 5,1 | 5,1 | 5,7 | 6,0 | 6,9 |
| Tank contents | l | 60 | 60 | 60 | 60 | 60 |
| Water connections | Inch | 1 | 1 | 1 | 1 | 1 |
| Dimensions about | ||||||
| Width | mm | 600 | 600 | 600 | 600 | 600 |
| Length | mm | 600 | 600 | 600 | 600 | 600 |
| Height | mm | 1980 | 1980 | 1980 | 1980 | 1980 |
| Empty weight: about | kG | 180 | 180 | 190 | 200 | 210 |
| Series type RKV | Unit | 6.6 | 7.6 | 8.6 | 9.6 | 10.6 |
|---|---|---|---|---|---|---|
| Cooling performance at | ||||||
| Water inflow | kW | |||||
| +10 | °C | 15,7 | 19,9 | 26,0 | 31,3 | 35,5 |
| +15 | °C | 18,9 | 23,9 | 31,0 | 37,0 | 42,0 |
| +20 | °C | 22,5 | 28,4 | 36,8 | 44,3 | 47,5 |
| Compressor drive | kW | 4,1 | 5,3 | 7,5 | 8,8 | 11,1 |
| Air capacity | m³/h | 12000 | 12000 | 12000 | 12000 | 12000 |
| Number of fans | 1 | 1 | 1 | 1 | 1 | |
| Pump capacity | m³/h | 3,66 | 4,56 | 5,1 | 6,0 | 6,8 |
| Pump drive | kW | 2,2 | 2,2 | 2,2 | 3,0 | 3,0 |
| Pump pressure | bar | 3,8 | 3,4 | 3 | 2,8 | 2,4 |
| Connection capacity* | kW | 7,5 | 8,7 | 10,9 | 14,0 | 16,4 |
| max. Connection capacity | kW | 9,7 | 11,7 | 15,4 | 18,5 | 21,8 |
| Tank contents | l | 150 | 150 | 150 | 150 | 150 |
| Water connections | Inch | 1 1/2 | 1 1/2 | 1 1/2 | 1 1/2 | 1 1/2 |
| Dimensions about | ||||||
| Width | mm | 750 | 750 | 750 | 750 | 750 |
| Length | mm | 750 | 750 | 750 | 750 | 750 |
| Height | mm | 2040 | 2040 | 2040 | 2040 | 2040 |
| Empty weight: about | kG | 315 | 325 | 350 | 390 | 480 |
| Series type RKV | Unit | 11.6 | 12.6 | 13.6 | 14.6 | 15.6 |
|---|---|---|---|---|---|---|
| Cooling performance at | ||||||
| Water inflow | kW | |||||
| +10 | °C | 38,5 | 43,0 | 52,0 | 62,6 | 77,0 |
| +15 | °C | 46,0 | 52,0 | 60,0 | 74,0 | 92,0 |
| +20 | °C | 54,5 | 61,0 | 73,6 | 88,6 | 109,0 |
| Compressor drive | kW | 11,1 | 12,8 | 2x 7,5 | 2x 8,7 | 2x 11,1 |
| Air capacity | m³/h | 24000 | 24000 | 24000 | 24000 | 36000 |
| Number of fans | piece | 2 | 2 | 2 | 2 | 3 |
| Pump capacity | m³/h | 7,8 | 8,6 | 10,3 | 12,2 | 13,8 |
| Pump drive | kW | 3,0 | 3,0 | 4,0 | 4,0 | 4,0 |
| Pump pressure | bar | 3,3 | 3 | 5,3 | 5 | 4,5 |
| Connection capacity* | kW | 16,6 | 18,3 | 21,4 | 24,1 | 30,0 |
| max. Connection capacity | kW | 23,1 | 26,1 | 30,5 | 35,0 | 43,0 |
| Tank contents | l | 200 | 200 | 200 | 200 | 200 |
| Water connections | Inch | 1 1/2 | 1 1/2 | 1 1/2 | 1 1/2 | 1 1/2 |
| Dimensions about | ||||||
| Width | mm | 750 | 750 | 750 | 750 | 750 |
| Length | mm | 1500 | 1500 | 1500 | 1500 | 2250 |
| Height | mm | 2050 | 2050 | 2050 | 2050 | 2050 |
| Empty weight: about | kg | 580 | 590 | 610 | 630 | 820 |
| Series type RKV | Unit | 16.6 | ||
|---|---|---|---|---|
| Cooling performance at | ||||
| Water inflow in | kW | |||
| +10 | °C | 75,0 | ||
| +15 | °C | 110,0 | ||
| +20 | °C | 132,9 | ||
| Compressor drive | kW | 3x 8,7 | ||
| Air capacity | m³/h | 36000 | ||
| Number of fans | piece | 3 | ||
| Pump capacity | m³/h | 15,7 | ||
| Pump drive | kW | 4 | ||
| Pump pressure | bar | 4,2 | ||
| Connection capacity* | kW | 33,9 | ||
| max. Connection capacity | kW | 50,5 | ||
| Tank contents | l | 200 | ||
| Water connections | Inch | 2 | ||
| Dimensions about | ||||
| Width | mm | 750 | ||
| Length | mm | 2250 | ||
| Height | mm | 2050 | ||
| Empty weight: about | kg | 860 |
*at 15°C medium and 32° ambient temperature
Water temperature range: from +10 °C to +25 °C (other ranges on request)
Type of cooling: air-cooled using axial fan (water-cooled or using radial fan on request)
Electrical connection: RKV 1.6 - 5.6 - 3x400 V PE 50 Hz; 3x 460 V PE 60 Hz: from RKV 6.6: 3x 400 V PE 60 Hz (other voltages and frequencies on request)
Designed ambient temperature: +32 °C (higher and lower temperatures on request)
Range of application of the industrial cooler: from +8 °C to +42 °C ambient temperature (higher and lower temperatures on request)
Circulation medium: drinking water (according to specification) with a spread of about 5K between water inlet and outlet (other ranges on request)
Technical modifications and errors reserved
The refrigerant cycle consists of a compressor, air-cooled condenser, expansion valve and evaporator. Various equipment options are available depending on the process requirements. Only modern refrigerants with low global warming potential, such as R454C, are used. All refrigeration components are sourced from brand-name manufacturers and are designed for high operational reliability, long service life and worldwide availability. The entire refrigeration cycle is designed for efficient, economical and sustainable operation and meets the applicable requirements of the CE directives and DIN EN 378.
.
All electrical equipment is designed for safe and reliable operation of the industrial cooling system and complies with current standards. Precise temperature control is achieved in all models of the RKV series via a microprocessor-controlled digital temperature controller.
The water circuit is fully integrated into the sturdy industrial housing and is made of corrosion-resistant materials as standard (depending on the medium). The water tank is made of highly stable, water-neutral plastic and is equipped with a tank cover ; a stainless steel version is available as an option.
The hydraulic decoupling of the water and refrigerant circuits opens up an extremely wide range of applications.
The water circuit is completely pre-assembled and its design – consisting of piping, evaporator and pumps – is tailored to a defined volume flow and operating pressure. Pumps for higher pressures and/or larger volume flows are available for special requirements. In addition, alternative circulation media such as oil can be used. A continuous flow cooler version is also available as an option, either without a tank or without a pump.
Product views RKV series
Download
Direct inquiry
You already know which RKV cooler you need? Or would you like advice from our specialists before? Make your inquiry here.
Used machines
Our standard industrial coolers are also available both from stock and as reconditioned used units. We are constantly expanding the range of our used machinery market. It’s worth a look. Maybe there is something for your application.
Other recooling systems
Main applications
Machine Tools and Mould Making
Cooling of turning, milling, grinding and eroding machines. Spindles, machine beds and electronics. We manufacture standard and system-specific cooling units and system solutions for a wide range of cooling requirements. For high precision, temperature stability and continuous operation in process cooling.Learn more
Welding and Cutting Technology
DELTATHERM®industrial coolers find numerous applications in welding and cutting plants. Constant cold water is required for MIG/MAG welding, plasma cutting and of course resistance welding.Learn more
Laser Technology
Process cooling of lasers, optics and electronics. Controlled laser cooling with DELTATHERM® industrial cooling systems in 19" rack housings / rack chillers or as compact auxiliary coolers. Also suitable for DI water. Temperature stability of < +/- 0.1K.Learn more
Packaging and Printing Industry
Cooling and temperature control of printing rollers, UV lamps for labelling printing machines; spindles and drives, blister machines; plastic blowing machines (PET bottles); film sealing machines; can sealing machines.Learn more
Automotive Industry
Cooling for welding and cutting processes, laser and sheet metal processing, paint bath cooling, cooling of machine tools and of circulating air for drying purposes, cooling lubricant preparation as well as hydraulic cooling for presses. We adapt our cooling solutions to the respective requirements.Learn more
Medical and Laboratory Technology
Cooling of sensitive devices MRT, CT, RX, magnetic coils The wide range of medical applications and laboratory processes require individual cooling and temperature control solutions. The use of redundant systems ensures safe and reliable operation.Learn more
Food, Chemistry & Pharma
Temperature control of stirring and mixed tanks and heat exchangers. DELTATHERM® temperature control and heating/cooling units allow you to respond very flexibly to individual requirements and achieve optimum solutions in the temperature range from -80 °C to +300 °C.Learn more
Plastics Industry
Cooling and temperature control of injection moulding machines, blow moulding machines and extruder lines as well as other plastics processing machines. Our industrial coolers, refrigeration systems or temperature control systems are used for mould cooling and hydraulic cooling.Learn more