Abstract
Flow control valves are relatively simple devices designed to maintain a constant output flow irrespective of input pressure. They have a wide range of industrial uses. This study examines their potential for maintaining constant fluid flow rate in agricultural spraying operations, in particular for low-volume and ultra-low-volume aerial application. Comparisons were made between the performance of two commercially available models and the variable restrictor unit of Micronair atomizers, using various spray formulations and operational parameters. It was concluded that flow control valves would be a good low-cost alternative to variable restrictor units under many conditions.
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