When a Type 4 system is in loop flush mode, what happens to one of the solenoids on the 58AF-9-1 defuel/flush valve?

In a Type 4 system when it is set to loop flush mode, the energization of solenoids is vital for the appropriate operation of the defuel/flush valve. In this context, when the "B" solenoid energizes, it causes the main valve to open. This is critical for allowing the flushing process to occur effectively, as opening the valve facilitates the flow of the flushing loop, enabling any contaminations or undesirable substances in the system to be adequately cleared out.

The function of the solenoids is integral to managing the valve's states, such as closing or opening. Opening the main valve not only aids in the flushing process but also ensures that fluid flows through designated pathways, effectively maximizing the system's ability to maintain cleanliness and operational integrity during maintenance procedures. Additionally, understanding which solenoid acts in which mode highlights the design and operational principles of hydraulic systems, which are crucial for effective water and fuel systems maintenance.