KOBOLD Instruments Inc • 1801 Parkway View Drive • 15205 Pittsburgh, PA • Tel: +1 412 788 2830 • E-mail: Please activate JavaScript • visit koboldusa.com

v31-durchfluss.png: Variable Area Flow Meter / Switch V31

Variable Area Flow Meter / Switch V31

Measuring / switching range:
3 - 30 ... 1000 - 10 000 l/h water
36 - 360 Nl/h ... 18 - 180 Nm³/h air
Connection: G ¼ ... G 2 female thread, hose connector, glue-in connection, flange DN10 ... DN65, ANSI ½ ... 2½"
Material: glass inside protection tube
pmax: 15 bar
Temperature range: 0 ... 80°C
Accuracy class: 1.6 / 2.5
Option: contact


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2,3 MB

Operating Instructions

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V31 - Operating Instructions

4,1 MB
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V31 Ex - Operating Instructions

2,1 MB


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General Safety Instructions

175 KB


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1,6 MB

Operating principle

The measuring element is composed of a float and a conical glass tube.
A medium flows from the bottom to the top through the measuring ring, lifting the float until the buoyancy force and the weight of the float establish equilibrium. The height of the float in the measuring ring is the measure of the flow. The flow rate is read directly from a scale inscribed on the glass.
The readings obtained apply solely to the medium for which the device has been calibrated or for a medium with the same density and viscosity.

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KOBOLD Instruments Inc.

1801 Parkway View Drive
15205 Pittsburgh PA
United States of America

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