Pneumatic Solids Transports
Reference data and engineering information about pneumatic solids transports for miscellaneous applications.
Overview
Engineering reference data for Pneumatic Solids Transports in miscellaneous.
Key Formulas
Unit Conversion
Multiply by conversion factor.
Linear Interpolation
Estimate between two known points.
Percentage
Part as fraction of whole.
Variables
| Symbol | Description | Unit |
|---|---|---|
| Input value | — | |
| Output value | — | |
| Conversion factor | — |
Recommended Air Carrying Velocities
The following table provides recommended air carrying velocities for various materials in pneumatic solid transport systems.
Material / Product | Approx. Density(lb/ft³) | Suction Pressure(in H₂O) | Carrying Velocity(m/s) | Carrying Velocity(ft/min) |
|---|---|---|---|---|
| Ashes, powdered clinker | 30 - 43 | 6500 - 8500 | ||
| Ashes from coal | 30 | 3 | 28 | 5500 |
| Beans | 28 | 4 | 31 | 6000 |
| Buffing dust | 2.5 | 19 | 3700 | |
| Cement | 100 | 5 | 30 - 46 | 6500 - 9000 |
| Coal, powdered | 20 - 28 | 4000 - 5500 | ||
| Coffee beans | 15 - 20 | 3000 - 4000 | ||
| Cork | 14 | 1.5 | 17 - 28 | 3000 - 5500 |
| Corn, wheat, rye | 45 | 3.5 | 25 - 36 | 5500 - 7000 |
| Cotton, dry | 5 | 2 | 22 - 30 | 3500 - 6500 |
| Flour | 17 - 30 | 3500 - 6500 | ||
| Grain dust | 10 - 15 | 2000 - 3000 | ||
| Grinding & foundry dust | 30 | 2 | 17 - 23 | 3500 - 4500 |
| Jute | 22 - 30 | 4500 - 6500 | ||
| Lead dust | 20 - 30 | 4500 - 6500 | ||
| Leather dust | 8 - 12 | 1800 - 2500 | ||
| Lime, hydrated | 30 | 3 | 25 - 36 | 5500 - 7500 |
| Limestone dust | 10 - 15 | 2000 - 3500 | ||
| Malt | 35 | 3 | 24 | 4800 |
| Metal dust | 15 - 18 | 3500 - 4000 | ||
| Metal turnings | 2.5 | 20 | 4500 | |
| Mineral wool | 12 | 2 | 22 | 3500 |
| Oats | 22 - 30 | 4500 - 6500 | ||
| Paper cuttings | 20 | 3 | 25 | 5000 |
| Plastic molding powder | 15 - 17 | 3000 - 3500 | ||
| Plastic dust | 10 - 12 | 2000 - 2500 | ||
| Pulp chips | 22 - 36 | 4500 - 7000 | ||
| Rags, dry | 30 | 2.5 | 20 - 33 | 4000 - 6500 |
| Rubber dust | 10 - 15 | 2000 - 3000 | ||
| Salt | 28 | 5500 | ||
| Sand | 30 - 46 | 6000 - 9000 | ||
| Sandblast | 17 - 23 | 3500 - 4500 | ||
| Sawdust & shavings, light | 12 | 2.5 | 10 - 17 | 2000 - 3500 |
| Sawdust & shavings, heavy | 17 - 23 | 3500 - 4500 | ||
| Shavings, light | 9 | 2.5 | 22 | 3500 |
| Shavings, heavy | 24 | 3 | 20 | 4000 |
| Sugar | 30 | 6000 | ||
| Textile dust | 10 - 15 | 2000 - 3500 | ||
| Vegetable Pulp, dry | 23 | 4500 | ||
| Wood chips | 20 - 25 | 4500 - 5500 | ||
| Wool | 22 - 30 | 4500 - 6000 |
Source: engineeringtoolbox.com
Application Notes
The values in the table are guidelines. The optimal air velocity depends on specific material properties (particle size, shape, moisture, bulk density) and system design (pipe diameter, layout, bend radius). Velocities must be high enough to prevent settling and blockages but low enough to minimize wear, pressure drop, and material degradation.
Unit Conversions
- Density:
- Pressure: