During refueling, which component holds the defuel side of the main valve inlet closed in the 302AF fueling and defueling valve?

The correct answer identifies the solenoid as the component responsible for holding the defuel side of the main valve inlet closed during refueling in the 302AF fueling and defueling valve. In fueling systems, solenoids are electromechanical devices that control the flow of fuel by opening or closing valves. When energized, the solenoid actuates the valve mechanism, allowing or restricting fuel flow based on the operational requirements of the system.

In the specific context of the 302AF valve, during the refueling process, the solenoid ensures that the defuel side remains securely closed to prevent backflow while maintaining proper operational integrity. This functionality is critical for ensuring safety and efficiency during refueling operations, as it prevents unwanted fuel leakage or mixing.

The other components mentioned, such as the pressure differential shutoff, loading pressure relief control, and Hytrol, serve different roles within fuel systems but do not specifically manage the defuel side closure during refueling. The pressure differential shutoff is designed to prevent excessive pressure differentials that could lead to malfunctions, the loading pressure relief control manages pressure within the load system to prevent over-pressurization, while a Hytrol is typically a type of valve used for flow regulation or control, but