The spray nozzle is a critical component of the sprayer. Though small, it determines key factors such as application rate, droplet size, and spray uniformity. Nozzles are generally categorized into two types: fan nozzles for herbicide application and cone nozzles for insecticide and fungicide application.
Based on agronomic requirements for plant protection machinery and Yuhe's extensive field validation experience, the following recommendations apply: - Post-emergence herbicide application: 80-degree fan nozzles - Pre-emergence herbicide application: 110-degree fan nozzles Post-emergence spraying requires 3–5 atmospheres of pressure. The 80-degree fan nozzle is a high-pressure nozzle. Under these conditions, it produces fewer drift-prone droplets smaller than 100 microns and fewer large droplets larger than 400 microns, resulting in a uniform droplet size distribution. For pre-emergence spraying, select 2–3 atmospheres of pressure. The 110-degree fan nozzle is a low-pressure nozzle, producing fewer drifting droplets below 100 microns and exhibiting good droplet size uniformity. If used post-emergence with higher spray pressure, it generates excessive drifting droplets below 100 microns, leading to significant drift loss and severely compromising efficacy.
Selecting the correct nozzle and spray pressure is crucial for controlling pests, diseases, and weeds during agricultural cultivation, ensuring increased crop yields and income.
Additionally, nozzle materials include plastic, copper, and stainless steel. The Yuhe self-propelled sprayer is compatible with various nozzle types to meet different customer requirements.