What component helps in isolating the coupler doors from opening on the B side?

The component that plays a crucial role in isolating the coupler doors from opening on the B side is the isolate air system. This system is designed to ensure that the coupler doors cannot be opened unintentionally, thereby enhancing safety during operations.

When isolate air is activated, it creates a barrier that prevents the airflow necessary for the coupler doors to open. This is especially important in situations where the train is in motion or during maintenance procedures, ensuring that there are no accidental openings that could pose risks to personnel or equipment.

The functionality of the isolate air mechanism is focused on maintaining the integrity of the coupler system by effectively managing the pressure and ensuring that the doors remain secure unless explicit action is taken to allow them to open. This feature is essential for the safe and reliable operation of the train's coupler system, contributing to overall operational safety standards.