Compact liquid-air cooling system FLK series

Cooling capacity from 1,1 kW – 10,5 kW

Compact liquid-air cooling system with tank and pump

When cooling the process medium in the temperature range above 25 °C, the air convection cooling of the FLK cooler is an energy-saving alternative to compression cooling.

Thanks to a wide range of options, the system can be customised and expanded as needed.

Circulating media

Water

Flow temperature range

10 – 40 °C

Functionality of the liquid-air cooling systems

The circulation pump conveys the circulating medium back over the component to be cooled via the DELTATHERM^® liquid-air cooler. The series is ready for connection in frost-free indoor installation.

Main application area

Liquid-cooled:

Motor spindles, drives, torque motors, servo motors, linear motors, inverters,
bearings, tools, welding equipment, X-ray equipment, CT or MRT systems

Short specification of the standard equipment

Container-mounted heat exchanger and submerged pump
Motors and electrical switches prepared for direct connection by the customer
Highly-efficient water / air heat exchanger made of copper tubing with pressed-on lamellae made of aluminium and a frame made of galvanised sheet steel
Fan in axial design with suction-mounted sickle blade
Direct drive via AC or three-phase current external rotor motor
Maintenance-free and friction-optimised ball bearings
Medium circuit
Unit completely piped or hosed internally
Externally mounted media connections
Large-volume water tank made of HDPE / stainless steel / steel
Free tank filling through a resealable filler
Tank emptying option
External contact protection in accordance with DIN 31001
Protection class IP 54

Available options

Complete control and regulation
Level switch
Air filter mat for air inlet at the heat exchanger
Air filter mat monitoring
Variable speed control of the fans
Pump overflow valve for pump protection
Manometer for display of the water outlet pressure
Wire marking
Heavy-duty connector (e.g. Harting)
Flow monitor with analog or digital signal
Water filter
Gate valves in flow and return
Check valves and solenoid valves for the water circuit (consumer higher than coolant)
Tank filling via floater valve
Automatic water backfeed with floater switch
Tank heating for temperature control
Pump switch-off
Multi-circuit system
24V AC/DC control voltage
Potential-free collective fault indicator
External ON/OFF switching
Special voltages and frequencies (50/60Hz)
Limit temperature monitoring
Differential temperature control
External temperature sensor

Technical data

Series FLK 1 - 7	Unit	FLK 1	FLK 2	FLK 3
Cooling capacity	kW	1,1	1,6	3,6
Air inlet temperature	°C	20	20	20
Air volume	m³/h	800	1400	2600
Medium inlet temperature	°C	30,0	30,0	30,0
Medium outlet temperature approx.	°C	27	27	27
Medium amount approx.	l/min	5	10	15
Pump pressure	bar	2,8	2,5	2
Pump drive capacity (50/60 Hz)	kW	0,46 / 0,66	0,11 / 0,15	0,46 / 0,66
Medium pressure loss	bar	0,5	0,5	0,5
Water / Glycol mixture	%	70 / 30	70 / 30	70 / 30
Tank contents approx.	l	27	27	27
Number of axial fans	Piece	1	1	1
Connected load per fan (50/60 Hz)	kW	0,68 / 0,70	0,64 / 0,78	0,13 / 0,23
Water connection outlet/inlet	Inch	3/4 " IG (female)	3/4 " IG (female)	3/4 " IG (female)
Max. operating pressure		atmospherically open
Air direction		horizontal
Width (W)	mm	320	320	320
Length (L)	mm	500	500	500
Total height (H)	mm	710	710	710
Empty weight about	kg	45	45	45
Connection voltage	V / Hz	3x400 V +/- 10 % 50 Hz PE 3x460 V +/- 10 % 60 Hz PE
Medium temperature min. / max.	°C	+5 / +50	+5 / +50	+5 / +50
Ambient temperature min. / max.	°C	+5 / +50	+5 / +50	+5 / +50
Noise level at 1 m distance approx.	dB(A)	70	70	70
Pipe material		Copper
Lamella material		Aluminium

Series FLK 1 - 7	Unit	FLK 4	FLK 5
Cooling capacity	kW	4,3	6,4
Air inlet temperature	°C	20	20
Air volume	m³/h	2600	5200
Medium inlet temperature	°C	30,0	30,0
Medium outlet temperature approx.	°C	27	27
Medium amount approx.	l/min	15	30
Pump pressure	bar	2	2,9
Pump drive capacity (50/60 Hz)	kW	0,46 / 0,66	1 / 1,35
Medium pressure loss	bar	0,5	0,5
Water / Glycol mixture	%	70 / 30	70 / 30
Tank contents approx.	l	27	27
Number of axial fans	Piece	1	1
Connected load per fan (50/60 Hz)	kW	0,13 / 0,23	0,13 / 0,23
Water connection outlet/inlet	Inch	3/4 " IG (female)	3/4 " IG (female)
Max. operating pressure		atmospherically open
Air direction		horizontal
Width (W)	mm	320	420
Length (L)	mm	500	600
Total height (H)	mm	710	810
Empty weight about	kg	45	49
Connection voltage	V / Hz	3x400 V +/- 10 % 50 Hz PE, 3x460 V +/- 10 % 60 Hz PE
Medium temperature min. / max.	°C	+5 / +50	+5 / +50
Ambient temperature min. / max.	°C	+5 / +50	+5 / +50
Noise level at 1 m distance approx.	dB(A)	70	70
Pipe material		Copper
Lamella material		Aluminium

Series FLK 1 - 7	Unit	FLK 6	FLK 7
Cooling capacity	kW	7,9	10,5
Air inlet temperature	°C	20	20
Air volume	m³/h	5200	5200
Medium inlet temperature	°C	30,0	30,0
Medium outlet temperature approx.	°C	27	27
Medium amount approx.	l/min	40	50
Pump pressure	bar	2	1
Pump drive capacity (50/60 Hz)	kW	1 / 1,35	1 / 1,35
Medium pressure loss	bar	0,5	0,5
Water / Glycol mixture	%	70 / 30	70 / 30
Tank contents approx.	l	27	27
Number of axial fans	Piece	1	1
Connected load per fan (50/60 Hz)	kW	0,65 / 0,85	0,65 / 0,85
Water connection outlet/inlet	Inch	3/4 " IG (female)	3/4 " IG (female)
Max. operating pressure		atmospherically open
Air direction		horizontal
Width (W)	mm	420	420
Length (L)	mm	600	600
Total height (H)	mm	810	810
Empty weight about	kg	49	49
Connection voltage	V / Hz	3x400 V +/- 10 % 50 Hz PE, 3x460 V +/- 10 % 60 Hz PE
Medium temperature min. / max.	°C	+5 / +50	+5 / +50
Ambient temperature min. / max.	°C	+5 / +50	+5 / +50
Noise level at 1 m distance approx.	dB(A)	70	70
Pipe material		Copper
Lamella material		Aluminium

Components in contact with circulating medium: Stainless steel, brass, bronze, copper, plastic, rubber, iron

Technical modifications and errors reserved.

If you need help or have further questions, we will be happy to help you. Feel free to send us a message via the above direct inquiry.

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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.

Used machines