What are the fail-safe measures for the actuator of an emergency shut-off valve?

2020-10-07View Original

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Paragraph 6.4.1 of the \"Design Code for Tank Areas in Petrochemical Storage and Transportation Systems\" (SH/T 3007-2014) stipulates that the actuator of emergency shut-off valves must have fail-safe features. The \"Notice issued by the General Office of the Ministry of Emergency Management\" (Emergency Management Department [2020] No. 23) requires that emergency shut-off valves be of fail-safe design. What kind of faults are referred to here? Is it a safeguard against failures in the valve actuator, or is it merely a feedback signal indicating the valve’s operating status?

Reply #22020-10-07

Failures: power loss, loss of power supply (compressed air); these are the most dangerous. Safety measures include having a backup power source or energy storage device for electric systems

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What are the fail-safe measures for the actuator of an emergency shut-off valve?

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