RKV_DK Series

continuous-flow coolers

Cooling capacity 9.3 kW to 147 kW

Compact cooling units of the RKV_DK Series as continuous-flow coolers without medium tank; optionally with pump

Industrial continuous-flow coolers of the RKV_DK Series consist of a refrigerant circuit, medium circuit and electrical engineering – all components installed in one housing. The cooling of the circulating medium takes place via a heat exchanger, the so-called evaporator.

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_DK continuous-flow coolers

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
Flexible control and temperature precision through ACC control possible on request

Main applications:

Filtration technology, food industry, plastics industry – everywhere where existing tanks or containers can heat up and require cooling or temperature control.

Short specification of the standard equipment

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 optionally as pipe coil heat exchanger
Thermostatic expansion valve for coolant injection
High and low-pressure switch
Piping of the medium circuit made from stainless material (iron-free)
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
CE-compliant
Cooling technology designed according to EN 378 part 2
Electronics designed according to EN 60204
RoHS and REACH-compliant

Available options

Outdoor installation
Air filter mat
Radial fans
Split design
Water-cooled condenser
Low-noise design
Cold fluid outlet temperature < +8 °C
Temperature stability ± 0,2 K
Temperature stability ± 0,02 K
Medium temperatures up to 40 °C
Refrigeration gauge for high and low-pressure side
Overflow valve
Fixed bypass
Multi-circuit system
Heat recovery
Flow monitor with analog or digital signal
Medium filter
Gate valves in flow and return
Heating for temperature control
Pump made from bronze or stainless steel
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 color

Technical data

Continuous flow cooler with optional pump for water / emulsion up to 8% and oil up to 32cSt

Series Type RKV_DK	Unit	1.5	2.5	3.5
Cooling performance at	kW
Medium inflow
+10 °C		6,4	7,6	9,0
+15 °C		7,8	9,2	10,9
+20 °C		9,3	11,0	13,0
Compressor drive	kW	1,7	2	2,4
Air capacity	m³/h	4500	4500	4500
Number of fans	Piece	1	1	1
req. flow rate for water	l/min	80	80	80
req. flow rate for emulsion min. 8%	l/min	80	80	80
req. flow rate for oil	l/min	130	130	130
Pressure loss in flow cooler approx.	bar	1	1	1
Connection capacity	kW	2,4	2,7	3,1
Particle size max.*	µm	50	50	50
Water connections	DN	32	32	32
Dimensions about
Width	mm	600	600	600
Length	mm	600	600	600
Height	mm	1980	1980	1980
Empty weight: about	kg	165	190	220

Series Type RKV_DK	Unit	4.5	5.5	6.5
Cooling performance at	kW
Medium inflow
+10 °C		11,0	13,9	18,0
+15 °C		13,0	16,5	22,0
+20 °C		16,0	19,7	26,0
Compressor drive	kW	2,9	3,5	4,7
Air capacity	m³/h	4500	4500	12000
Number of fans	Piece	1	1	1
req. flow rate for water	l/min	80	80	160
req. flow rate for emulsion min. 8%	l/min	80	80	160
req. flow rate for oil	l/min	130	130	320
Pressure loss in flow cooler approx.	bar	1	1	1
Connection capacity	kW	3,6	4,2	6,3
Particle size max.*	µm	50	50	50
Water connections	DN	32	32	65
Dimensions about
Width	mm	600	600	750
Length	mm	600	600	750
Height	mm	1980	1980	1980
Empty weight: about	kg	240	260	315

Series Type RKV_DK	Unit	7.5	8.5	9.5
Cooling performance at	kW
Medium inflow
+10 °C		22,0	25,0	29,0
+15 °C		27,0	30,0	35,0
+20 °C		32,0	36,0	42,0
Compressor drive	kW	5,5	6,2	7,2
Air capacity	m³/h	12000	12000	12000
Number of fans	Piece	1	1	1
req. flow rate for water	l/min	160	160	160
req. flow rate for emulsion min. 8%	l/min	160	160	160
req. flow rate for oil	l/min	320	320	320
Pressure loss in flow cooler approx.	bar	1	1	1
Connection capacity	kW	7,1	7,8	8,8
Particle size max.*	µm	50	50	50
Water connections	DN	65	65	65
Dimensions about
Width	mm	750	750	750
Length	mm	750	750	750
Height	mm	1980	1980	1980
Empty weight: about	kg	325	350	390

Series Type RKV_DK	Unit	10.5	11.5	12.5
Cooling performance at	kW
Medium inflow
+10 °C		33,0	37,0	43,0
+15 °C		40,0	45,0	51,0
+20 °C		48,0	55,0	62,0
Compressor drive	kW	8,2	9,3	11,1
Air capacity	m³/h	15900	31800	31800
Number of fans	Piece	1	2	2
req. flow rate for water	l/min	160	240	240
req. flow rate for emulsion min. 8%	l/min	160	240	240
req. flow rate for oil	l/min	320	640	640
Pressure loss in flow cooler approx.	bar	1	1	1
Connection capacity	kW	9,8	12,5	14,7
Particle size max.*	µm	50	50	50
Water connections	DN	65	80	80
Dimensions about
Width	mm	750	750	750
Length	mm	750	1500	1500
Height	mm	1980	2010	2010
Empty weight: about	kg	480	580	590

Series Type RKV_DK	Unit	13.5	14.5	15.5
Cooling performance at	kW
Medium inflow
+10 °C		50,0	58,0	68,0
+15 °C		60,0	71,0	82,0
+20 °C		72,0	84,0	98,0
Compressor drive	kW	12,4	14,4	16,2
Air capacity	m³/h	31800	31800	31800
Number of fans	Piece	2	2	2
req. flow rate for water	l/min	240	350	350
req. flow rate for emulsion min. 8%	l/min	240	350	350
req. flow rate for oil	l/min	640	640	640
Pressure loss in flow cooler approx.	bar	1	1	1
Connection capacity	kW	16	18,2	19,8
Particle size max.*	µm	50	50	50
Water connections	DN	80	80	80
Dimensions about
Width	mm	750	750	750
Length	mm	1500	1500	2250
Height	mm	2010	2010	2010
Empty weight: about	kg	610	630	650

Series Type RKV_DK	Unit	16.5	17.5	18.5
Cooling performance at	kW
Medium inflow
+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
req. flow rate for water	l/min	350	350	350
req. flow rate for emulsion min. 8%	l/min	350	350	350
req. flow rate for oil	l/min	970	970	970
Pressure loss in flow cooler approx.	bar	1	1	1
Connection capacity	kW	23,8	26,8	29,5
Particle size max.*	µm	50	50	50
Water connections	DN	100	100	100
Dimensions about
Width	mm	750	750	750
Length	mm	2250	2250	2250
Height	mm	2010	2010	2010
Empty weight: about	kg	820	850	890

Medium 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 / emulsion up to 8% / oil up to 32cSt (sulphur-free) with a spread of approx. 5 K between medium inlet and outlet (other ranges on request).
* depending on degree of pollution

Technical modifications and errors reserved.