Emergency brake for a rail vehicle brake system for a railway vehicle and rail vehicle

The invention relates to emergency braking device for a rail vehicle, with a Notbremssteuerventileinrichtung (14), which it is able to provide an emergency brake control of a pneumatic braking system of the railway vehicle; and a Notbremseinstelleinrichtung (12, 54) that it is able to set the emergency brake control pressure provided to the pneumatic brake means in response to at least a load value of the rail vehicle and a velocity value of the rail vehicle. The invention also relates to a braking system for a rail vehicle and a rail vehicle.