I checked out Micdrow's site, Wilbur, and apparently the nozzles are for de-icing the propeller blades.
The nozzles are straight valves which are connected to a glycol tank placed directly behind the propeller (in the forward engine nacelle as far as I understood it).
The fluid isn't pumped, but fed via a valve and sprayed by centrifugel force directly onto the propeller blades.
Thanks for the link Micdrow, looks like a ton of info in there!