AC centrifugal compact fan (single-intake) – RG90-18/56

Short Description:

Clockwise, viewed toward rotor

Product Detail

Product Tags


Technical Description

General description

forward-curved impeller


0.560 kg


135 x 135 x 38 mm

Impeller material

Glass-fiber reinforced PA plastic

Housing material

Scroll housing made of glass-fiber reinforced PBT plastic, housing base made of sheet steel

Airflow direction

radial, discharge through window in housing

Direction of rotation

Clockwise, viewed toward rotor


Ball bearing

Service life L10 at 40 °C

35000 h

Service life L10 at maximum temperature

22500 h


2 leads AWG 22

Motor protection

Protected from overload by impedance protection




Nominal data




Type of voltage



Nominal voltage

in V



in Hz



in min-1


Power input

in W


Min. ambient temperature

in °C


Max. ambient temperature

in °C


Air flow

in m³/h


Sound power level

in B







Product drawing

Product Drawing

Introducing the AC centrifugal compact fan (single-intake) - RG90-18/56, designed to deliver high-performance and energy efficiency. This fan measures 135 x 135 x 38 mm, making it the perfect solution for compact spaces that require effective cooling. Powered by a reliable AC motor, the RG90-18/56 fan is capable of delivering an impressive airflow rate of up to 210 cubic meters per hour.

Featuring a robust construction and advanced design, the AC centrifugal compact fan is built to withstand demanding applications in harsh environments. Its durable aluminum frame and impeller provide exceptional resistance to corrosion, while its advanced motor design ensures optimal performance and durability. With a maximum noise level of only 65 decibels, this fan operates quietly, making it ideal for use in environments where noise levels need to be kept to a minimum.

Designed for easy installation and maintenance, the AC centrifugal compact fan (single-intake) - RG90-18/56 incorporates a simple wiring system and an easily accessible impeller for hassle-free maintenance. Its compact size and lightweight design make it easy to handle and install, while its versatile mounting options allow for flexible installation in a wide range of applications.

Suitable for a wide range of applications, the AC centrifugal compact fan (single-intake) - RG90-18/56 is ideal for use in electronic equipment, telecommunications, medical equipment, and other industrial applications. With its high-performance, energy-efficient design and reliable operation, this fan is sure to meet the cooling needs of even the most demanding applications.

In summary, the AC centrifugal compact fan (single-intake) - RG90-18/56 is a reliable and efficient cooling solution for applications that require effective cooling in compact spaces. Its durable construction, advanced design, and quiet operation make it ideal for use in a wide range of industrial and commercial applications. With its easy installation and maintenance, this fan is an excellent choice for any application that requires reliable cooling performance.

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  • What motors does Lianxing offer?
    Do you have a minimum order quantity?

    What’s the maximum voltage you can apply to a blower?
    The maximum voltage that can be applied to a fan motor varies from model to model, but is typically 5%-10% above the nominal voltage listed.  Consult the factory to determine the maximum voltage for a particular part number, and to learn more about the negative effects that high voltages might have on the motor

    What is a fan’s of voltage range?
    Ebmpapst EC fans are able to perform equally well across a range of input voltages. These fans will have the maximum and minimum acceptable voltages listed on the label, such as the one below:


    Note that in order to reach a desired performance point, the fan may need to draw additional current at low voltages.

    Can all 60 Hz blower motors operate on a frequency of 50 Hz?
    Not all ebmpapst fans are designed to operate at both 50 and 60 Hz. If a fan is able to accept both 50 Hz and 60 Hz power supplies, it will have a “50/60Hz” mark on its label, such as the one below:


    Consult the factory if you intend to use a power supply with a frequency that does not match the recommended frequency of your fan.

    How is fan performance defined?

    When determining fan performance, several factors are taken into consideration. These factors primarily include: airflow, static pressure, operating points, RPM, power & current, and sound performance. Of these factors, ebmpapst presents a performance curve with our products to provide a quick-glance overview of the performance. Performance curves use just three of the aforementioned factors: airflow, static pressure, and operating points.

    What is Airflow?
    For the air-moving industry, it is important to know how quickly some volume of air is being displaced from one location to another, or, more simply stated, how much air is being moved in a set amount of time.

    Ebmpapst typically expresses airflow in Cubic Feet per Minute (CFM) or cubic meters per hour (m3/h).

    What is Static Pressure?
    Once again the air-moving industry is faced with another challenge, the resistance to flow. Static pressure, sometimes referred to as back pressure or system resistance, is a continuous force on the air (or gas) due to the resistance to flow. These resistances to flow can come from sources such as static air, turbulence and impedances within the system like filters or grills. A higher static pressure will cause a lower airflow, in the same way that a smaller pipe reduces the amount of water that can flow through it.

    Ebmpapst typically expresses static pressure in inches water gauge (in. W.G.) or Pascals (Pa).

    What is the System Operating Point?
    For any fan we can determine how much air it is able to move in a given amount of time (airflow) and how much static pressure it can overcome. For any given system, we can determine the amount of static pressure it will create at any given airflow.

    Taking these known values for airflow and static pressure, we can plot them on a two-dimensional chart. The operating point is the point at which the fan performance curve and the system resistance curve intersect. In real terms, it is the amount of airflow a given fan can move through a given system.

    How do I read an air performance curve?
    To aid in fan selection, ebmpapst provides an air performance graph with its products. The air performance graph consists of a series of curves that chart airflow against static pressure.

    Follow along on the chart below. The x-axis is for airflow, while the y-axis is for static pressure. The blue line ‘A’ illustrates the fan’s performance outside of a system. To find the operating point 900CFM @ 2 in.w.g., follow the x-axis to 900, then follow the y-axis up to 2 (Point ‘B’). Since this operating point ‘B’ is below the performance curve, it is a point that the fan can achieve.


    Lines ‘C’, ‘D’, and ‘E’ are example system resistance curves – as airflow increases, the static pressure (or resistance to airflow) also increases, making it harder to move air. Typically, any point between the highest and lowest of our example resistance curves is the ideal operating range for the fan to achieve its highest efficiency. Some performance graphs will have multiple airflow curves; this would indicate that the fan is capable of multiple speeds in order to match operating points below its maximum speed, thus saving energy.

    What types of produces does ebmpapst make? What is each type best suited for ?

     Forward Curved Impellers


    • There are two types of forward curved impellers, dual and single inlet.
    • Used primarily in medium pressure, high flow applications.
    • Possible market uses: ventilation, refrigeration etc.

    Backward Curved Impellers


    • Used primarily in high pressure, high flow applications.
    • Possible market uses: data center, general ventilation, agriculture; transportation etc.

    Axial Fans


    • Used primarily in low pressure, high flow applications.
    • Possible market uses: LED, ventilation, agriculture; transportation, etc.
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