This document specifies the structural type, model and basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of the pneumatic conveying rotary valve for powder and granular materials (hereinafter referred to as "rotary valve"). This document applies to rotary valves used in pneumatic conveying lines for powder and granules. Powder materials: the average particle size of the material is ≤1mm. Granular materials: the average particle size of the material is 1~3.5mm.