Solenoid Valves Questions & Answers – 4

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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 both of the solenoid valves must “trip” in order to force the process valve to go to its “fail” position (i.e. 2oo2 to trip):

Two solenoid valves circuit

Answer :

Two solenoid valves circuit explanation

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