What is Dense Phase Conveying

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Pneumatic Conveying, Design Guidelines

Dense phase conveying transfers powders, granules, pellets, and bulk solids using low air velocity and high material concentration. Unlike dilute phase (suspension) flow, product moves in slugs or plugs at slow speed — ideal for fragile, abrasive, or high‑value materials.

Where Dense Phase Conveying is Used

Food Industry
Chemical Plants
Pharmaceuticals
Plastics/Resins
Minerals & Powders
Cement & Ash

Chosen when product integrity, hygiene, and reduced dust are critical.

Why Use Dense Phase Conveying?

  • Protect product integrity and avoid breakage or segregation
  • Minimise dust generation and contamination
  • Perform over long distances and through bends
  • Ensure hygienic, enclosed handling
  • Maintain product bulk density

Used where contamination, degradation, or product loss cannot be tolerated.

Key Benefits of Dense Phase Conveying

  1. Gentle Handling — Protects Product Quality
    Low velocity prevents damage, attrition, and segregation — essential for sensitive powders, granules, blends, and fragile crystals.
  2. Minimal Dusting and Product Loss
    Sealed, slow-moving transfer reduces dust — improving cleanliness, safety, and hygiene.
  3. Lower Air and Energy Usage
    Requires less conveying air, improving energy efficiency and reducing filtration/air-handling size.
  4. Longer Equipment and Piping Life
    Lower speed reduces abrasion and wear in pipelines and bends — ideal for abrasive materials.
  5. No Segregation of Mixed Ingredients
    Maintains blend integrity — ideal for premixes, instant drinks, seasonings, and additive mixes.
  6. Suitable for Long Distance & Complex Routing
    Efficient over long pipelines and multiple bends without degrading product.
  7. Fully Closed and Hygienic Transfer
    Sealed systems enhance cleanliness, avoid contamination, and reduce operator exposure.
  8. Better Process Control
    Predictable, consistent conveying with stable flow patterns improves yield and reliability.

Conclusion

Dense phase conveying provides gentle, efficient, contamination‑free transfer where quality and integrity matter. It reduces segregation, dust, energy use, and pipeline wear — often superior to dilute phase for sensitive or abrasive products.

At AMH Technologies, we design dense phase conveying systems tailored to product characteristics, conveying distance, hygiene level, and process demands — ensuring reliable, efficient bulk handling.

Dense Phase Conveying Control System

Dense Phase System

Dense Phase Conveying Pipeline

Dense Phase Pipeline