In the food industry, the conveying and discharging of powder materials require not only precision and stability, but also strict compliance with hygiene, safety, and cleanability standards. Common materials such as flour, milk powder, additives, flavorings, and leavening agents are typically fine, hygroscopic, and prone to cross-contamination, placing high demands on the rotary valve’s sealing performance, residue control, and easy-to-clean design.