VA 409 VA 409 VA 409 VA 409

VA 409

Article no: 0695 0409

Flow direction switch for compressed air systems

The new thermal flow direction switch VA 409 with direction indication serves for determination of the flow direction of
compressed air and gases especially in closed circular pipelines.

By means of VA 409 with flow direction indication the flow direction of the compressed air can be determined quickly and safely. Compared with the former mechanical paddle flow switches VA 409 is able to detect even the smallest changes in the flow direction quickly and without any mechanical movement.

The direction information in form of a potential-free contact (normally closed max. 60 VDC, 0.5 A) is transferred to the
consumption sensors VA 400/VA 420 or to a separate building management system (mbs). Two LEDs show the flow direction.

In connection with 2 consumption sensors VA 400/VA 420 incoming and outflowing compressed air in closed circular pipelines
can be measured precisely.

Special features

  • detects smallest changes < 0.1 m/s referred to 20 °C and 1000 mbar
  • no mechanical wear parts
  • easy installation under pressure 

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    Download the data for this product in PDF format

    Detection range recognition flow direction:

    < 0.1 m/s referred to 20 °C and 1000 mbar

    Measuring principle: 

    calorimetric measurement

    Sensor:

    Pt 30/Pt 700/Pt 330

    Measuring medium:

    air, gases

    Operating temperature:

    0...50 °C probe tube
    -20...70 °C housing

    Operation pressure:

    up to 16 bar

    Power supply:

    24 VDC, 40 mA

    Power input:

    max. 80 mA up to 24 VDC

    Protection class:

    IP 54  

    EMV:

    acc. to DIN EN 61326

    Connection:

    2 x M12, 5-pole, plug A and plug B

    2 potential-free contacts:

    2 x U max. 60 VDC, I max  A (normally closed);
    on request: Normally open

     Housing:

    polycarbonate

    Probe tube:

    stainless steel, 1,43031, lenght 160 mm, Ø 10 mm, safety ring Ø 11.5 mm, longer probes on request

    Mounting thread:

    G 1/2"

    Diameter housing:

    65 mm

    Flow direction:

    2 LEDs

     

    DescriptionVersionFormat/Size
    VA 409V1_02_2010PDF Documentpdf (1.12 MB)
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