Evaluation of an air-pinch pulse width modulation valve for variable rate pesticide spray applications

J. Campos; H. Zhu; H. Jeon; R. Salcedo; E. Ozkan; E. Gil

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Evaluation of an air-pinch pulse width modulation valve for variable rate pesticide spray applications

In: Precision agriculture '25

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J. Campos

J. Campos

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H. Zhu

H. Zhu
heping.zhu@usda.gov

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H. Jeon

H. Jeon

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R. Salcedo

R. Salcedo

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E. Ozkan

E. Ozkan

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E. Gil

E. Gil

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Type:: Chapter

Pages:: 343–348

DOI:: https://doi.org/10.1163/9789004725232_043

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Dar Hadith al Hassania

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Electric pulse width modulation (PWM) solenoid valves regulate nozzle flow rates for precision spray applications. However, pesticide residues inside the valves can cause malfunctions. An airpiloted PWM pinch valve was evaluated to modulate flow rates for hollow-cone nozzles because the air-pinch valve avoids chemical contact with its internal parts. Tests compared this valve with a conventional electric PWM valve by measuring flow rates and droplet sizes from Teejet nozzles at different pressures and duty cycles (DUC). Both valves showed similar performance, although the air valve failed at 10% DUC. Thus, the air-pinch PWM valve could be potentially used as an alternative for variable-rate pesticide applications using formulations that generate a high amount of residue.

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Precision agriculture '25

E-Book ISBN:: 9789004725232

Publisher:: Wageningen Academic

Print Publication Date:: 18 Jun 2025

Subjects
- Life Sciences
  - General
  - Agriculture & Environment

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Evaluation of an air-pinch pulse width modulation valve for variable rate pesticide spray applications

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Precision agriculture '25

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