V(m3/h)=V1(L/rev)xN(rpm)x60x η(%)
G(T/h)=V(m3/h)xρ(T/m3)xK
V:discharging capacity(m3/h) V1: Rotor volume per revolution(L/rev)
N: rotor speed per minute(rpm) η:Volume efficiency of rotor(%)
ρ:material’s bulk density(T/m3) K: correction factor usually is 0.7~0.8
The above formula is the general one. We will adjust the specific data as per actual working condition.
Some photos on rotary valve with airlock are for a reference :