Which of the following is not a quarter-turn valve?

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Multiple Choice

Which of the following is not a quarter-turn valve?

Explanation:
Valves that are designed for quick on/off control are typically operated with about a 90-degree turn. Ball valves, plug valves, and butterfly valves all use a rotating element that aligns or blocks a flow path with a single quarter-turn. The needle valve, on the other hand, is built for precise throttling and requires multiple turns of the stem to move the needle toward or away from the seat, giving fine control rather than quick shut-off. So the one not a quarter-turn valve is the needle valve. Needle valves are commonly used where precise flow adjustment is needed, such as instrumentation or dosing lines.

Valves that are designed for quick on/off control are typically operated with about a 90-degree turn. Ball valves, plug valves, and butterfly valves all use a rotating element that aligns or blocks a flow path with a single quarter-turn. The needle valve, on the other hand, is built for precise throttling and requires multiple turns of the stem to move the needle toward or away from the seat, giving fine control rather than quick shut-off. So the one not a quarter-turn valve is the needle valve. Needle valves are commonly used where precise flow adjustment is needed, such as instrumentation or dosing lines.

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