Output G Calculation Formula G = 0.06 VnKρ (t/h) In the formula: V---- volume of rotary valve (L) n---- speed (r/min) ρ---- bulk density of material (t/m³) K---The filling factor is 0.6~0.8 for particles and 0.4~0.6 for powder For example：a 9L flour pneumatic conveying rotary valve output： G=0.06*9*53*0.5*0.5=7.155（t/h）