Screw Feeder with Agitator

Screw feeders are designed to volumetrically measure material from a hopper, container, or silo at a controlled rate. Many screw feeders or feeders use adjustable speed drives to allow the material flow rate to be varied.A volumetric screw feeder feeds a certain material volume per unit time to a process. Such a feeder consists of a hopper, material discharge device, and controller. The Gravimetric Concept. A gravimetric feeder adds a weigh system and new control scheme to what would otherwise remain a basic volumetric feeder