Which statement best defines a tight shutoff on a gate valve?

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Multiple Choice

Which statement best defines a tight shutoff on a gate valve?

Tight shutoff means the gate is fully seated against the valve seats, so there is no path for fluid to bypass the gate when the valve is closed. When you turn the stem enough to press the disk firmly into the seats, a seal is created and leakage through the seats is minimized or eliminated. The idea of stem alignment with the flow, or removing the handle, doesn’t define whether the valve is sealing, and a valve cannot be truly closed if it isn’t seated; being fully open when closed is contradictory.

Tight shutoff means the gate is fully seated against the valve seats, so there is no path for fluid to bypass the gate when the valve is closed. When you turn the stem enough to press the disk firmly into the seats, a seal is created and leakage through the seats is minimized or eliminated. The idea of stem alignment with the flow, or removing the handle, doesn’t define whether the valve is sealing, and a valve cannot be truly closed if it isn’t seated; being fully open when closed is contradictory.

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