What is the normal position of a non-operating brake valve?

The non-operating brake valve is typically designed to remain in a "handle-off" position during regular operations when it is not being actively used to apply or release brakes. This position ensures that the valve does not inadvertently engage the braking system while the train is in motion or when the operator is not actively using it. It helps maintain a state where the brake system remains ready for use without affecting the regular operation of the train.

In the "handle-off" position, the valve’s functionality is deliberately disabled, preventing any unintended brake application and promoting a safer operation for the train. This is crucial in ensuring that operators can quickly engage the brakes when necessary without confusion or the risk of accidental engagement caused by an inoperative valve's position.

Other positions such as "running release," "emergency," or "dynamic release" are specific to active braking scenarios and are used in particular circumstances where there are operational needs to either release the brakes or apply them in emergency conditions. They are not suitable for the standard resting state of the non-operating brake valve.