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Sprayer Cleaning: The Importance of the Sprayer Adjustment on the External Contamination
Authors: Balsari P., Marucco P.
Keywords: Spray deposit, external cleaning, air-assisted sprayer, field crop sprayer
A new ISO standard concerning the cleaning of sprayers (ISO DIS 22368) is on the way to
be defined. It deals with both external and internal cleaning of the sprayers and aims at defining
standardized procedures for the evaluation of the efficiency of the cleaning devices provided with the
machines. In the ambit of the studies carried out to prepare this standard, several tests were made in
order to assess the external contamination of boom sprayers and of orchard sprayers according to
different operating parameters (type of nozzles, operating pressure, boom height, air flow rate).
Concerning the boom sprayers, both conventional type and air-assisted type were tested (in this
latter case also the influence of the air stream orientation was investigated), while orchard sprayers
were tested using different types of nozzles and air flow rates.