A normally open control valve is ________.

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Multiple Choice

A normally open control valve is ________.

Explanation:
A normally open valve stays open when there is no control signal. That means at zero psi, there’s no actuation to close it, so flow is allowed. When a control pressure is applied, the valve moves toward closing, reducing or stopping flow depending on the system’s design. So “open with 0 psi pressure” is the best description. The other options describe states that would require a nonzero signal to stay open or describe a normally closed arrangement, which isn’t how a normally open valve behaves.

A normally open valve stays open when there is no control signal. That means at zero psi, there’s no actuation to close it, so flow is allowed. When a control pressure is applied, the valve moves toward closing, reducing or stopping flow depending on the system’s design. So “open with 0 psi pressure” is the best description. The other options describe states that would require a nonzero signal to stay open or describe a normally closed arrangement, which isn’t how a normally open valve behaves.

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