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Solenoid Valves Questions & Answers – 5

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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