Help. . Should a control valve on the flare line be selected as FC or FO?

2017-05-08View Original

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Help. . Should a control valve on the flare line be selected as FC or FO?

Reply #22017-05-08

There should be a control valve on the branch line or main line ahead of the regulating valve on the flare line; this control valve is of type FO. For safety reasons, this regulating valve should also be of type FO

Reply #32017-05-08

I’ll check with the process engineers again regarding FO!

Reply #42017-05-08

For safety reasons or in case of a failure, it’s better to have it fully open

Reply #52017-05-08

The FO valve should be opened to prevent overpressure

Reply #62017-05-09

The main purpose of a control valve is regulation; therefore, whether to use FC or FO depends on the process conditions, and there is no universal answer. I’ve seen both FC and FO.

Reply #72017-05-09

This post was last edited by dqkwb on 2017-5-9 08:52. The flare valves are all air control valves. In the event of an accident, power and airflow are shut off without pressure buildup.

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