What is the commonly recommended minimum spraying pressure for aerial application?

What is the commonly recommended minimum spraying pressure for aerial application?

• A. 10 psi
• B. 30 psi
• C. 70 psi
• D. 110 psi

Answer: (B)

In aerial spraying, keeping the spray from drifting while still getting good coverage relies on the nozzle pressure being high enough to produce a stable, well-atomized spray. A minimum around 30 psi is used because it provides enough flow to form a consistent spray pattern and appropriate droplet size for most common aerial nozzles, helping ensure the liquid reaches the target area evenly. If the pressure is too low, like 10 psi, the spray tends to atomize poorly, leading to coarse droplets, uneven coverage, and potential nozzle clogging. If the pressure is much higher, such as 70 or 110 psi, the droplets become finer, which can increase drift risk and wear on the equipment, making it harder to control deposition. So, 30 psi is the practical minimum that balances adequate spray quality with drift management for typical aerial applications.

In aerial spraying, keeping the spray from drifting while still getting good coverage relies on the nozzle pressure being high enough to produce a stable, well-atomized spray. A minimum around 30 psi is used because it provides enough flow to form a consistent spray pattern and appropriate droplet size for most common aerial nozzles, helping ensure the liquid reaches the target area evenly.

If the pressure is too low, like 10 psi, the spray tends to atomize poorly, leading to coarse droplets, uneven coverage, and potential nozzle clogging. If the pressure is much higher, such as 70 or 110 psi, the droplets become finer, which can increase drift risk and wear on the equipment, making it harder to control deposition.

So, 30 psi is the practical minimum that balances adequate spray quality with drift management for typical aerial applications.