A control valve with 'fail-open' (air-to-close) action is specified for a cooling water service. What is the safety rationale?
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A
Cooling water must stop flowing on loss of instrument air to prevent water hammer
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B
Cooling water must continue flowing on loss of instrument air to prevent overheating
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C
Fail-open prevents cavitation in the valve body
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D
Air-to-close reduces actuator wear