Volumetric Feeder
Behpoo volumetric feeders dose dry bulk materials at discharge rates from 3 to 5,000 kg per hour with 1.5 – 2.5% accuracy. Single screw, twin screw and vibratory versions are built to suit how your material flows.
A volumetric feeder meters material by volume. A defined volume is collected in the feed trough as the screw turns, driven forward and discharged into the process downstream. Rate is set by screw speed alone.
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Because there is no weighing, the control is open-loop: the drive holds the set speed regardless of what is actually in the trough. If the bulk density changes, if the material bridges above the trough, or if flow behaviour shifts, the output changes and the system does not know. Where that matters, the gravimetric feeder closes the loop with load cells.
Where bulk density is stable, the volumetric feeder is the economical answer — fewer components, no weighing system, simpler installation.
Behpoo builds three types: single screw for general powders and granules, twin screw for cohesive and poor-flowing materials, and vibratory tray for fragile products that must not be sheared. All are supplied in platform or suspended arrangements with hopper volumes from 50 to 1,400 litres.
Benefits & Features
- Discharge rate 3 – 5,000 kg/hour across the size range
- Feeding accuracy 1.5 – 2.5%
- Single screw, twin screw and vibratory versions
- Modular design — hopper, dosing element and drive specified separately
- Platform and suspended mounting arrangements
- Hopper volumes 50 – 1,400 litres
- Product-contact parts in stainless steel; ATEX and NEC options available
Product Range
| Type | What it is | Typical use |
|---|---|---|
| Single Screw | One auger in a trough, rate set by screw speed | General powders and granules with reasonable flow |
| Twin Screw | Two intermeshing augers, self-wiping | Cohesive, sticky and poor-flowing materials |
| Vibratory Tray | Material advances on a vibrating tray, rate set by amplitude | Fragile and shear-sensitive products, flakes and formed pieces |
Available Options
| Option | Choices |
|---|---|
| Size index | 18 · 37 · 70 · 85 · 120 |
| Mounting | Platform (P) · Suspended / hanging (H) |
| Hopper shape | Asymmetric (A) · Symmetric (S) · Cylindrical (C) |
| Hopper volume | 50 · 80 · 110 · 180 · 250 · 320 · 450 · 750 · 1100 · 1400 litres |
| Screw geometry | Auger (AG) · Concave (CC) · Spiral (SP) |
| Screw pitch | Fine (F) · Coarse (C) |
| Drive | Servo motor (SV) · Gear motor (GM) |
| Hopper agitation | Agitator · Vibrator · Level sensor |
| Materials | Painted carbon steel body · stainless steel hopper and screws |
| Safety | Standard · ATEX · NEC |
Technical Specification
| Parameter | Unit | Range |
|---|---|---|
| Discharge rate | kg/h | 3 – 5,000 |
| Feeding accuracy | % | 1.5 – 2.5 |
| Inlet hopper volume | litre | 10 |
| Screw diameter | mm | 20 |
| Coarse pitch | mm | 18 |
| Fine pitch | mm | 10 |
| Chassis material | — | Stainless steel / painted carbon plate |
Areas & Application
Plastics Processing
Metering virgin resins, colorants and additives in compounding, extrusion and injection moulding, where consistent composition drives product quality. Also used as refill devices, bin dischargers and transfer into conveying lines.
Food Processing
Dosing ingredients for baking and confectionery, and metering spices and flavourings, in sanitary execution where product integrity and food safety compliance are required.
Pharmaceutical Manufacturing
Dispensing powdered and granular materials and active ingredients, where precise dosing and hygienic design support regulatory compliance.
Chemical & Petrochemical
Metering catalysts, additives and raw materials for mixing, reaction and formulation, in corrosion-resistant execution.
Construction Materials
Consistent dosing of additives, fillers and aggregates in concrete, mortar and composite production.
Options & Compliance
- MaterialsProduct-contact parts in stainless steel; painted carbon steel or stainless chassis
- Hazardous areaATEX and NEC hazardous location options available
- EnclosureIP55 standard · IP65 washdown
- Control interfaceProfinet · Modbus TCP · EtherNet/IP; VFD or servo drive with recipe management
- StandardsFDA CFR 21 and EU 1935 for food contact · ATEX 2014/34/EU · EN 60204-1 · ISO 12100
Send us your material, required rate and turndown — we will select the size, screw geometry and hopper.