Introduction

Volumetric Screw Feeder with Dual Pneumatic Conveying System Using an AirTurbine Blower

A volumetric screw feeder is a precision material handling system designed to delivera consistent and controlled volume of bulk materials at a predetermined feed rate. Thefeeder utilizes a rotating screw enclosed within a tube or trough to accurately meterpowders, granules, and other free-flowing materials from a storage hopper into adownstream conveying system

The screw feeder discharge is integrated with a pneumatic conveying system powered by an air turbine blower, which generates the airflow required to transport themetered material through enclosed pipelines. This arrangement provides continuous,dust-free, and efficient conveying while minimizing material loss, contamination, andmanual handling.

An advanced feature of this system is the dual pneumatic outlet configuration , wherea single volumetric screw feeder is capable of supplying material to twoindependent pneumatic conveying lines. By incorporating a diverter valve orautomated flow selection mechanism at the feeder discharge, the system can direct themetered material to either conveying line individually or, where process requirementspermit, distribute the material between both outlets. This enables a single feeder toserve multiple process points, reducing equipment requirements, installation costs, andfloor space while improving operational flexibility

The air turbine blower is sized to provide the required airflow and conveying pressurefor reliable material transport to both pneumatic outlets. The system can be equippedwith electrically or pneumatically actuated diverter valves and integrated with a PLC-based control system to automate outlet selection based on production demand, batchrecipes, or downstream equipment availability.

This integrated solution is ideal for industries such as chemicals, pharmaceuticals, foodprocessing, plastics, minerals, cement, and specialty materials, where precise materialdosing, hygienic handling, and flexible distribution to multiple processing stations areessential.

Technical Specification:

Key Features and Benefits

• Accurate and continuous volumetric material feeding.
• Single screw feeder serving two pneumatic conveying outlets.
• Automatic or manual outlet selection using a diverter valve.
• Air turbine blower providing stable airflow for efficient conveying.
• Dust-free, enclosed material transfer with minimal product loss.
• Reduced equipment investment by eliminating the need for multiple feeders.
• Lower maintenance and reduced installation footprint.
• PLC-compatible controls for automated operation and process integration.
• Flexible material routing to multiple reactors, mixers, silos, or packaging lines.
• Suitable for powders, granules, and other free-flowing bulk materials.

Additional System Advantage

The dual pneumatic outlet design significantly enhances plant flexibility by allowingone volumetric screw feeder to supply two different production lines or storagelocations without requiring duplicate feeding equipment. This optimizes equipmentutilization, reduces capital and operating costs, simplifies maintenance, and enablesseamless switching between conveying destinations, making the system an efficientand economical solution for modern bulk material handling applications.