If the Barrier Fails during online then What will be the control valve positio

If the Barrier Fails during online then What will be the
control valve position in field or Positioner action in the
field.

Question Posted / sian_444

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If the Barrier Fails during online then What will be the control valve position in field or Positi..

Answer / rajesh.kon

Control valve will turn its failure position either close or
open (FO/ FC)

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If the Barrier Fails during online then What will be the control valve position in field or Positi..

Answer / nikunj dungarshi furia

it will return to its position at no signal condition i.e.
either normally closed (air to open / fail closed) or
normally open (air to close / fail open)

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If the Barrier Fails during online then What will be the control valve position in field or Positi..

Answer / james

Based on the process
1st If barrier fails before escalating to a incident - The answer is fail safe c/v CLOSE
2nd when barrier fails - fail safe action done - Then the fail safe action will be - c/v OPEN to atm / flair

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