| Accurately and reliably controlling material flow at even normal process rates can be challenging. With loss-in-weight microfeeding, the challenge is twofold: controlling the feedrate of minor ingredients to micro levels in the range of 20 g/h while achieving a feeding precision that permits a sample-to-sample variation of only a few percent. |
Powder and Bulk Engineering International is a technical publication devoted to readers in the powder and bulk solids market outside North America.
Technical Articles
Introduction to microfeeding powders
Pharmaceutical and other industries have spurred demand for continuous, gravimetric low-rate powder feeding, where an hour's worth of feeding might add as little as 1 teaspoon of material to a process. The lowest rates are achieved by loss-in-weight microfeeders, which can control the flow of minor ingredients at rates down to 20 g/h or lower. This article explains how microfeeding differs from feeding at higher rates, how microfeeding can be applied, and how to select a microfeeder and specify its performance level.
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