How does screw pitch differ for powders and granules in a commercial food screw conveyor?

Powder handling emphasizes stable feeding and anti-bridging, while granules require lower compression and breakage; pitch should reflect that difference. The purchase decision should use the actual recipe, load, and duty cycle rather than a catalogue maximum. At acceptance, repeat the agreed test with production-equivalent material and compare the result with the contractual tolerance. These records make the technical promise measurable and reduce disagreement when the machine arrives at the buyer’s site. For repeat orders, preserve the approved configuration so a later machine is built to the same practical performance basis and documented settings.