Volumetric dosing feeder

gravimetricworm screwtwin-screw

Product overview
A screw feeder for pneumatic conveying systems is a mechanical device used to feed bulk materials consistently and accurately into a pneumatic transport line. It employs a rotating screw conveyor to transfer material from the inlet to the discharge, enabling precise dosing and a uniform material flow while reducing bridging and segregation.

Key features

• Constructive material: Stainless Steel or Carbon Steel.
• Control capability from a control panel.
• Design flow rates starting from 500 Kg/h and customizable to customer requirements.
• Axle distance (length): 500 mm to 5000 mm (per requirements).
• Design diameters: 2" to 10" (per requirements).
• Inclination angle: 0° to 30° (per requirements).
• Inlet and discharge connections via flange.
• Drive: gearbox motor 220–440 VAC, 3Ph, 50–60 Hz.
• Optional automatic discharge valve available.
• Motor electrical protection: IP54.

Types of screw feeders

• Horizontal Screw Feeder: Designed to convey material along a horizontal route; suitable where vertical space is limited.
• Inclined Screw Feeder: Uses an incline to raise material from a lower to a higher level; suitable when modest elevation is required.
• Vertical Screw Feeder: Enables vertical transport of bulk materials for significant elevation requirements.
• Twin Screw Feeder: Two parallel screws increase dosing capacity and improve handling of large volumes or challenging materials.

Applications

• Food industry: Accurate dosing of ingredients in food and beverage production (designed for hygienic versions as required).
• Chemical industry: Precise dosing of chemicals and additives in manufacturing processes.
• Pharmaceutical industry: Controlled feeding of active ingredients and excipients (in compliance with hygiene/traceability requirements where applicable).
• Plastic industry: Dosing and conveying of resins and additives.
• Construction industry: Dosing of cement, sand and other bulk materials in mixing or batching processes.
• Mining industry: Metering of minerals and bulk solids during processing.
• Recycling industry: Controlled flow of recyclable materials for sorting and reprocessing.

Technical specifications

• Materials: Stainless Steel or Carbon Steel construction.
• Flow capacity: from 500 Kg/h and up (customizable to application).
• Axle distance: 500 mm to 5000 mm (per requirements).
• Design diameters: 2" to 10" (per requirements).
• Inclination: 0° to 30° (per requirements).
• Connections: inlet and discharge via flange.
• Drive: gearbox motor 220–440 VAC, 3Ph, 50–60 Hz.
• Optional: automatic discharge valve.
• Motor protection: IP54.