Pressure and vacuum conveying systems commonly utilize rotary airlock valves to introduce material to the air stream. Hand-held wands and non-flow-through (flood-feed) pick-up adapters can be utilized with vacuum systems.
Rotary Airlock Valves with Flow-Through
Pick-Up Adapters (Pressure and vacuum systems)
Rotary airlock valves with flowthrough pick-up adapters can be utilized in pressure and vacuum systems for both controlled metering of material into the conveying system, and maintaining the pressure differential between the conveying system and ambient atmosphere.