What is the purpose of bleed valves at the ends of the spray boom?

The purpose of bleed valves at the ends of the spray boom is primarily to prevent pressure from building up from trapped air when the spray valve is opened. When aerial applicators operate their equipment, air can become trapped in the spray system, which can create pressure issues that may affect the effectiveness of the spray application. By incorporating bleed valves, any excessive air can be released before the sprayer is activated, ensuring that the system operates under optimal pressure conditions when pesticides are being dispersed. This helps maintain consistent flow and distribution of the spray, leading to more uniform application and reducing the risk of uneven coverage or potential damage to crops.