Pneumatic — vacuum
Under vacuum, a leak pulls room air in — never powder out. The inherently contained method for hygiene-critical and hazardous transfer.

In brief
Vacuum conveying draws powder toward a receiver under negative pressure. Because any leak flows inward, containment is inherent — the reason it is preferred for hazardous, high-value and hygiene-critical powders. TLG builds vacuum systems with hygienic receivers, reverse-jet filters and tri-clamp connections for wash-down duties.
In detail
A vacuum receiver mounts above the destination — a mixer, a packing head, a process vessel. The pump draws air through the convey line; powder rides the stream into the receiver, the filter keeps it there, and a discharge valve drops the batch when the cycle completes.
The method's limits are honest ones: vacuum can only pull so hard, so distances and rates are lower than pressure systems. Within that envelope — refill loops, mixer feeding, packing-line supply — it is the cleanest transfer there is.
Common questions
Related
Send the material, throughput and plant constraints. You’ll get a considered answer from an engineer, not a brochure.