The role of multiple curves in the anti-surge system
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Multiple curves of the anti-surge system: 1, the red line represents the surge line SL; 2, the pink line represents the rapid opening line DUMP; 3, the yellow line represents the predicted anti-surge line SCL; 4, the blue line represents the actual anti-surge line SCL#. Moreover, the curves shown for the compressor when it is operating normally differ from those when it is stopped.
They are different; every time surge occurs, the surge line shifts, and some designs allow for manual reset
Could you share the curve as an attachment so I can take a look? If it’s on DCS, you can also take a photo and upload it.