The relevant characteristics which identify the performances of a nozzle are the following:
1. The liquid flow delivered as a function of the nozzle feed pressure.
2. The opening angle of the produced spray.
3. The nozzle efficiency, as the ratio between the energy of the spray and the energy used by the nozzle.
4. The evenness of the flow distribution over the target.
5. The droplet size distribution of the spray.
6. The jet impact of the spray.