Abstract: Powder conveying apparatus, particularly useful for transferring powder paint from a hopper to a spray gun, employs two flow constrictors defining axially aligned flow passages between a powder inlet and an outlet. An annular gap between opposed ends of the flow constrictors communicates with a compressed gas supply passage for entraining powder from the inlet to the outlet, and one of the flow constrictors is displaceable for adjusting the annular gap and thereby varying the powder throughput rate independently of the compressed gas supply.