Bühler Technologies GmbH
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Oil/air coolers

Oil/air coolers

A complete product line for efficient temperature stabilisation using ambient air in oil systems. Robust cooling matrixes and energy-efficient low noise fans are the key components of these low-maintenance designs. Combined with compact gerotor pumps, they are the basis for efficient cooling circuits, cooling filter circuits or subsystems.


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  • [Translate to English:] Öl-Luftkühler zur Stabilisierung der Öltemperatur in Hydraulischen Systemen
    Oil/air coolers BLK series
    • wide range up to approx. 110 kW heat flow
    • easy to service
    • cooling matrix with defined dynamic service life
    • also available with bypass
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  • [Translate to English:] Öl-Luftkühler mit Systemgerechtem Kühlregister/Fördermengenverhältnis zu Temperatur-Stabilisierung in Hydraulik Systemen.
    Oil/air coolers BNK series
    • integrated circulating pump
    • low noise emission
    • easy to service
    • also available with bypass
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  • [Translate to English:] Die Öl-Luftkühler der Baureihe ELK übernehmen die Aufgabe der Temperaturstabilisierung gewissenhaft und effizient, sowohl im Rücklauf oder Nebenstrom der Anlagen.
    Oil/air coolers ELK series
    • Compact design
    • Low noise emission
    • High cooling capacities
    • Rugged cooling matrix
    • Flexible use in the return or bypass
    • Optimised costs for standard applications
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  • [Translate to English:] Effiziente Kühlregister aus hochfestem Aluminium, sowie eine kompakte, einfache und kostengünstige Konstruktion zeichnen die Baureihe ENK aus.
    Oil/air coolers ENK series
    • High cooling capacities
    • Compact installation dimensions
    • Low noise emission
    • Robust cooling coil
    • Powerful, efficient pump
    • Cost-optimised for standard applications
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  • [Translate to English:]
    Off-line filter / cooler unit FGSL
    • Oil / air cooler with pump and filter
    • Easy to maintain
    • Low noise emission gerotor pump
    • Filter with contamination indicator

    Off-line cooler with installed filter housing. Filter elements suitable for the respective application.

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FAQ: Oil/air coolers

  • Is air suitable as a cooling medium?

    Yes, but compromises must be made when calculating the optimum size of an oil cooler. The temperature of the available ambient air depends on local and weather-related conditions and can vary significantly. These fluctuations are much greater than those of water as a cooling medium, which means that a larger performance reserve must be considered in the cooler design.

  • What is another important design criterion?

    In addition to fluctuating air temperatures, varying oil flow rates often make it more difficult to determine the optimum cooler size. For this reason, we generally recommend the BLK and ELK series. These units are coupled with a circulation pump and operate with a constant oil flow rate. They also provide an excellent basis for additional system integration and customized solutions.

  • Are there preferred installation locations for oil/air coolers?

    Yes. Two key factors should be considered: dust/particle contamination and solar radiation. Indoors, a sufficient distance from traffic routes and dust sources should be maintained. Outdoors, installation on the north side of a building or under a protective canopy is advantageous. In some cases, the cooler and the hydraulic unit should be installed separately.

  • What distinguishes Bühler Technologies oil/air coolers?

    The coolers are designed so that the cooling core can be easily removed for maintenance purposes without having to dismantle other components.

  • Can customized cooler designs also be supplied?

    Yes. Please send your detailed requirements to Fluidcontrol@remove-this.buehler-technologies(dot)com.