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Reading: Identify Solenoid Valves Energized or de-energized?
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Inst Tools > Blog > Practical Questions > Identify Solenoid Valves Energized or de-energized?

Identify Solenoid Valves Energized or de-energized?

Sketch arrows next to each of the two solenoid valves showing the directions of air flow in the energized (E) and de-energized (D) states.

Last updated: March 14, 2021 10:02 pm
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Sketch arrows next to each of the two solenoid valves showing the directions of air flow in the energized (E) and de-energized (D) states.

Assuming the process control valve is supposed to be open in regular operation and close if both of the solenoid valves “trip” (i.e. 2oo2 to trip):

solenoid valves trip

Answer:

solenoid valves 2oo2 to trip

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1 Comment
  • sajith says:
    June 17, 2020 at 11:45 am

    Is the Process control valve air fail open or air fail close??

    Reply

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