Which statement is true about flat-fan nozzle operating ranges?

Which statement is true about flat-fan nozzle operating ranges?

• A. Suitable pressures are 30-60 psi (commonly 40 psi)
• B. They should operate under 10 psi
• C. They require at least 100 psi
• D. They are unaffected by pressure

Answer: (A)

Flat-fan nozzle performance depends on operating pressure to produce a uniform, even spray that covers target surfaces adequately. The typical operating range is about 30 to 60 psi, with around 40 psi being common. At these pressures the spray pattern stays broad and stable, and the droplet size is appropriate for turf and ornamental applications, giving good coverage without excessive drift. If pressure falls well below this range, the fan may become weak or uneven, leading to poor coverage and coarser droplets that don’t reach the far edges of the target. If pressure climbs too high, droplets become smaller, which increases drift risk and can create an overly fine mist that deposits off-target. Therefore, the statement that flat-fan nozzles operate best within 30–60 psi (commonly around 40 psi) is the correct one. Pressures under 10 psi won’t produce a proper flat-fan pattern, pressures near 100 psi would generate excessive drift, and saying pressure doesn’t matter is incorrect because spray characteristics are directly controlled by pressure.

Flat-fan nozzle performance depends on operating pressure to produce a uniform, even spray that covers target surfaces adequately. The typical operating range is about 30 to 60 psi, with around 40 psi being common. At these pressures the spray pattern stays broad and stable, and the droplet size is appropriate for turf and ornamental applications, giving good coverage without excessive drift. If pressure falls well below this range, the fan may become weak or uneven, leading to poor coverage and coarser droplets that don’t reach the far edges of the target. If pressure climbs too high, droplets become smaller, which increases drift risk and can create an overly fine mist that deposits off-target. Therefore, the statement that flat-fan nozzles operate best within 30–60 psi (commonly around 40 psi) is the correct one. Pressures under 10 psi won’t produce a proper flat-fan pattern, pressures near 100 psi would generate excessive drift, and saying pressure doesn’t matter is incorrect because spray characteristics are directly controlled by pressure.