Flow Velocity and Volume Flow Measurement on a District Heating Pipeline No different to a drinking water network, district heating networks are also fitted with section gate valves, so that the damaged lines can be shut off quickly and safely in the event of an accident. The valve intiated blockage occurs in such a way that no pressure surges are triggered which could damage the plant. This is done by temporarly opening bypass valves while the main valve is closing - caring for relief flows. An accurate and reliable measurement of the flow velocity at the closing valve is critical as certain thresholds must not be exceed during the closing procedure. Non-invasive flow measurement with FLUXUS proved to be the ideal solution for this measuring task: The clamp-on ultrasonic transducers are f

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