A binary nozzle for atomizing a mixture of agent to be sprayed and spray air is connected to at least one supply duct via which the mixture or the agent to be sprayed can be supplied to the binary nozzle, wherein a valve is arranged between this supply duct and a nozzle outlet of the binary nozzle. A corresponding spray head and also a method for atomizing a mixture of agent to be sprayed and spray air uses a binary nozzle. The binary nozzle includes a nozzle body formed in a single piece and including the nozzle outlet, wherein a movable assembly of the valve is fastened to the nozzle body by a fastening element and/or held tight against the nozzle body by a spring device.