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
The cold fluid circuit is mainly made of a compressor, an air-cooled condenser, expansion valve and evaporator. In accordance with the process requirements, also radial condensers (for the air duct connection), split condensers (outer/inner unit) and a water-cooled condenser version are offered. We only use CFC-free coolants such as e.g. R134a and R407C. All cooling components are made by renowned brand manufacturers and guarantee reliability, long service life and global availability. The entire cooling circuit is designed for the optimal and economic function of the industrial cooler and corresponds to the most recent standards of the CE directive and of DIN EN 378.
The entire electronics is designed for the optimal functioning of the industrial cooler and corresponds to the latest standards of the CE directive and of DIN EN 60204. In all models of the RKV series, the precise temperature control is carried out by a microprocessor-controlled digital temperature controller. All RKV industrial coolers are suitable for indoor installation and can optionally also be installed outside.
The components of the water circuit are as standard made from stainless material and completely fitted in the stable industrial housing. The water tank is made from very stable and water-neutral plastic with tank cover (stainless steel tank as an option). The hydraulic decoupling of the water circuit from the cold fluid circuit enables endless areas of application in industry. The complete water circuit is fitted in the device with a circulation pump, pump manometer, pump overflow valve for pump protection, complete pipework as well as a diffusion-proof and highly efficient insulation. The water circuit (piping, evaporator and pumps) is designed for a defined flow volume and pressure. Different pumps are available for special requests (more pressure and/or higher flow volume). Circulation media other than water (e.g. oil) are, of course, also feasible. The design as a through-flow cooler (without tank, possibly without pump) is also feasible.
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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.
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