You can use rotary valves under these circumstances

1) Silo Emptying With Airlock:

The rotary valve placed under the silo, hopper or other container system is used to control the bulk solid (in powder or granule form) discharge from these units and feed device like conveyor, screw feeder, mixer etc.

2)Cyclone Discharge With Rotary Airlock:

The rotary valve placed under the cyclone is used to control the bulk solid discharge from the cyclone under pressure or vacuum and feed device like conveyor, screw feeder, mixer etc.

3)Dust Collection With Rotary Valve:

Dust collectors, filters, jet pulse filters are used to collect dust from production lines. Rotary valves installed under dust collection systems, are used to unload the dust.

4)Dosage Control, Mixing, Batching With Rotary Feeder:

Rotary valves can be used to control the amount of discharging of bulk solids. By controlling the rotor speed of airlock, volumetric measurement is possible for both powdered and granule type bulk materials. Volumetric feeding of mixers or containers are possible.

5)Pneumatic Conveying Systems With Airlock:

Rotary airlock valves are used to feed pneumatic conveying lines from silo, hopper, cyclone, big bag discharge stations etc. Rotary feeders prevent air leakage from conveying line and maintains constant feeding of powders or granules. 

6)Conveyor Feeding / Discharging With Rotary Valves:

Conveyors can be feeded from silos, hoppers or other containers with the help of airlocks. Bulk materials dishcarged from conveyors can also be fed into airlocks and then sent to another device like pneumatic conveying line, mixer etc.

7)Screw Feeder Feeding / Discharging With Rotary Valves:

Screw feeders can be feeded from silos, hoppers or other containers with the help of airlocks. Bulk materials dishcarged from screw feeders can also be fed into airlocks and then sent to another device like pneumatic conveying line, mixer etc.