A nozzle apparatus for a spray machine, in particular an agricultural crop sprayer, having a control element adjustable using an external power source for controlling the flow of a spray liquid from a spray line through at least one channel of the nozzle apparatus. Once the control element has been moved to a control position, the position is maintained without further need for external power. The control element may be a ball valve or slide valve. The control element is movable to select nozzle connections and may also be used to vary flow through the selected nozzle connections.
