What is the failure location of a self-acting pressure control valve?
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I would like to ask everyone: what is the difference between FO and FC settings for self-acting pressure control valves?
The faulty condition of a self-acting pressure control valve generally refers to the situation in which the valve fails to operate as intended when a fault occurs, which may result in either excessively high or low system pressure. In a fault condition, the valve may remain in the open or closed position and fail to respond to control signals. The difference in the settings of FO (forward control) and FC (feedback control) lies in the fact that FO focuses on adjusting the flow rate or pressure based on the set value, whereas FC adjusts the valve by monitoring the actual values to achieve more precise control. FO is typically used for simple control requirements, while FC is used for complex systems that require real-time adjustment. .
In the event of a failure, the valve is either open or closed; the first thing to consider is the impact of these open or closed states on safety, followed by quality and manufacturing processes.
The fault condition for the reduced-pressure type is open, while it is closed for the back-pressure type