Vortex flowmeter jump
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The Emerson vortex flow meter experiences a variation range of 2% to 12% when the valve is closed; its measurement range is 180 t/h. How should this be addressed?
Is there a jump when closing the control valve or the on/off valve?
How high is the pressure? When the pressure is high, the sudden closure of the valve can cause vibrations in the pipeline, leading to fluctuations in the vortex street
Check whether the straight pipe section of the flow meter meets the requirements? Does the pipeline vibrate during the transition? These two aspects should be carefully checked; I hope this can help you!
It is likely caused by vibration; observe on-site whether there is vibration when the valve is closed
When the flow rate is low enough, no vortex street array can be formed; coupled with vibrations, this leads to jumps in the values
It is caused by the inherent characteristics of the vortex flow meter: 1. It is not resistant to vibrations, and is prone to generating false signals due to vibrations； 2. Low flow rates cannot be detected.