Dilute phase powder pump and method for operating a dilute phase powder pump

A dilute phase powder pump for conveying powder from a powder reservoir to a powder spraying device, which comprises a powder inlet, which is fluidly connected or connectable to the powder reservoir, and a powder outlet, which is fluidly connected or connectable to the powder spraying device, wherein the dilute phase powder pump further comprises a powder-conveying injector having a drive nozzle and a collecting nozzle, and wherein the dilute phase powder pump comprises a valve device for selectively interrupting a fluidic connection between the powder inlet of the dilute phase powder pump and a powder inlet of the drive nozzle,

• wherein the dilute phase powder pump further comprises a compressed air inlet device which serves to supply compressed air as purge air for cleaning/flushing the dilute phase powder pump or components provided upstream and downstream of the powder-conveying injector respectively, and which opens into the fluidic connection at least at one point between the powder inlet of the dilute phase powder pump and the powder inlet of the drive nozzle in order to selectively supply compressed air as purge air, wherein the compressed air inlet device opens into the fluidic connection at a point between the valve device and the powder inlet of the drive nozzle.