How to Select the Best Volumetric Feeder for Your Process

Every Feeder Starts as a Volumetric Feeder

In principle, volumetric feeding is the simplest, most economical feeding solution available. Bulk material is held in a hopper and constantly fed into a process per unit of time. A gravimetric feed rate may be inferred through a calibration process where a timed sample is taken and weighed, and screw speed adjusted accordingly. Although there is no weight feedback to assure feeding accuracy over time, this may not be a concern for materials with consistent bulk density.

Choosing the Best Volumetric Feeder for Your Process

Coperion K-Tron offers three choices in volumetric feeders: the highly accurate bulk solids pump (BSP), single screw feeders and twin screw feeders. Coperion K-Tron volumetric feeders come in a wide variety of of sizes and configurations to meet your application requirements.

Volumetric Screw Feeders

By using Coperion K-Tron volumetric feeders, with their exchangeable screw design choices, you can handle a wide range of applications involving prefeeding, feeding or batching of materials that have a consistent density, particle size and moisture content.

Use Single Screw Feeders to handle free-flowing materials such as pellets and powders. Use Twin Screw Feeders to handle more difficult materials such as pigments, sticky, bridging or flooding powders, fibers and fiberglass. For more on volumetric screw feeders see:

• Feed Rates to Meet a Wide Range of Applications
• Screw Designs to Handle a Diverse Range of Bulk Materials

Bulk Solids Pump (BSP) Volumetric Feeders

The new Coperion K-Tron Bulk Solids Pump volumetric feeders provide gentle, precise feeding of free-flowing pellets, granules, flakes, powders and friable products.

BSP feeders use a patented positive displacement technology to feed free flowing materials with remarkable accuracy, offering uniform discharge, consistent volume and gentle handling.