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  • 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

    • 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
    • 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




















































































































































































    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.

    Direct inquiry

    Here you can place your inquiry for a FLK or request a consultation by our technical personnel for this product.

    Call up form

    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

    Main application area 

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