Pneumatic Conveying — Dilute Phase
Behpoo dilute phase systems convey powders and granules through pipework at up to 30 t/h over distances of several hundred metres. The route can bend, rise and split — with no moving parts along it.
In dilute phase conveying, material is suspended in a high-velocity air stream and carried through a pipe. Particles travel individually, fully entrained, from the pick-up point to a receiving filter or silo.
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The commercial case is routing. A pipe can turn, rise, run overhead and feed several destinations through diverter valves — none of which a mechanical conveyor does easily. The system is fully enclosed, so nothing escapes and nothing enters.
The trade is velocity. Air must stay above the material's saltation velocity or particles drop out and the line blocks; and that velocity means abrasion at bends and attrition of fragile products. For abrasive minerals and pellets that must arrive intact, [dense phase](dense-phase.md) is the answer.
Behpoo supplies pressure systems with a rotary valve feeding into the line, vacuum systems drawing from several pick-up points to one destination, and combined pressure-vacuum systems.
Benefits & Features
- Capacity to 30 t/h , distances to several hundred metres
- Fully enclosed — no dust escape, no contamination ingress
- Flexible routing with bends, rises and multiple destinations
- No moving parts along the conveying line
- Pressure, vacuum and combined systems
- Multiple pick-up and delivery points through diverter valves
- ATEX execution for combustible dust
Product Range
| Type | What it is | Typical use |
|---|---|---|
| Pressure System | Blower pushes material fed in by a rotary valve | One source to several destinations, longer distances |
| Vacuum System | Vacuum pump draws material from pick-up points to a receiver | Several sources to one destination; leak-inward for hazardous dust |
| Combined Pressure-Vacuum | Vacuum to a central receiver, then pressure onward | Complex plant layouts with many sources and destinations |
| Truck / Wagon Unloading | Vacuum system for discharging bulk vehicles | Raw material intake from tankers and wagons |
| Rail-Car / Ship Unloading | High-capacity vacuum with a mobile suction nozzle | Port and rail intake |
Available Options
| Option | Choices |
|---|---|
| Air source | Roots blower · Side channel blower · Vacuum pump · Compressed air |
| Material feed | Rotary valve · Venturi eductor · Pick-up wand |
| Pipe material | Carbon steel · SS304 · SS316 · Hardened bends |
| Bends | Standard radius · Long radius · Wear-resistant · Blind tee |
| Receiver | Filter receiver · Cyclone plus filter · Silo top filter |
| Routing | Single line · Diverter valves for multiple destinations |
| Safety | Standard · ATEX with earth bonding and explosion relief |
Technical Specification
| Parameter | Unit | Range |
|---|---|---|
| Capacity | t/h | 0.5 – 60 |
| Conveying distance | m | 10 – 300 |
| Pipe diameter | mm | DN 50 – DN 200 |
| Conveying velocity | m/s | Above saltation velocity for the material |
| Air-to-material ratio | — | 2 – 15 |
| System pressure | barg | 0.3 – 1 |
| Blower power | kW | 5.5 – 160 |
| Pipe material | — | Carbon steel · SS304 · SS316 |
| Filter area | m² | 5 – 120 |
| Hazardous area | Zone | 20 / 21 / 22 on request |
Areas & Application
Polymers & Plastics
Granule transfer from silos to extruders and injection machines, and truck unloading into storage.
Food Processing
Flour, sugar and starch transfer in fully enclosed lines that protect the product and the plant environment.
Chemicals
Powder transfer in vacuum systems, where leak-inward operation contains hazardous dust even if a joint fails.
Cement & Minerals
Fine powder transfer with wear-resistant bends where abrasion sets maintenance intervals.
Animal Feed
Ingredient transfer from intake to batching, with multiple destinations served through diverter valves.
Petrochemicals
Pellet and powder transfer across petrochemical plants, silo to line.
Options & Compliance
- MaterialsCarbon steel · SS304 · SS316; hardened or wear-resistant bends for abrasive materials
- Hazardous areaATEX execution with earth bonding, antistatic components and explosion relief
- FiltrationFilter receiver sized to air volume and dust load, with pulse-jet cleaning
- Control interfaceProfinet · Modbus TCP · EtherNet/IP with route selection and blockage detection
- StandardsATEX 2014/34/EU · EN 14491 dust explosion venting · EN 14460 explosion-resistant equipment · ISO 12100
Send us your material properties, capacity and route — we will size the line, air source and filtration.