Achieving effective moistening requires delivering the appropriate amount of water to a precise area, without causing damage by over-wetting. Even slight variations in spray thickness or drop size can lead to localized over-wetting, making it crucial to use a fine and uniform spray.
For continuous moistening of items moving on a conveyor, flat fan nozzles are often used, providing even liquid distribution to each item passing under the spray bar. However, this method requires proper item circulation on the conveyor.
When highly precise and controlled moistening is necessary, air atomizing nozzles are the preferred option. These nozzles offer greater control over spray properties and can produce very fine sprays at low flow rates.