Lean phase (dilute phase) conveying transfers powders and granules using high air velocity and low solids concentration. Particles remain fully suspended and travel at relatively high speed through pipelines between process points.

Where Lean Phase Conveying is Used

Food & Beverage
Plastics
Pharmaceuticals
Chemicals
Minerals
Feed Mills
Packaging Plants

Lean phase is common due to its flexibility and cost‑effectiveness.

Why Use Lean Phase Conveying?

  • Moderate material flow rates
  • Robust products that tolerate fast movement
  • Cost efficiency and system simplicity
  • Frequent conveying cycles
  • Lighter bulk density materials

Ideal for non‑fragile, free‑flowing powders or granules.

Key Benefits of Jumbo Bag Unloading Systems

  1. Lower System Cost and Simple Design
    Lean phase systems are mechanically straightforward with lower capital cost — making them a popular choice for factories and production lines.
  2. Versatile Material Handling
    They are suitable for conveying various bulk materials such as flour, starch, sugar, plastic pellets, seasoning powders, minerals, and additives — especially when the product is not easily damaged.
  3. Continuous Flow Operation
    Lean phase conveying supports continuous and frequent transfer, making it suitable for automated lines, batching systems, packaging lines, and ingredient delivery.
  4. Easy to Install and Operate
    Due to simplicity in layout and equipment, lean phase conveying is fast to design, install, maintain, and integrate into existing processes.
  5. Flexible Routing and Layout
    The system can transport materials over long distances, including vertical lifts and complex pipe bends, supporting space optimisation within factories.
  6. High Throughput Capability
    Lean phase conveying can handle significant volume movement, making it suitable for upstream or downstream feeding applications.

Conclusion

Lean phase conveying is an economical and widely used pneumatic transfer method for moving powders and granules. Its simple design, versatility, and ability to handle continuous flow make it ideal for many process industries—especially when materials are robust and fast movement will not damage product quality.

At AMH Technologies, we design lean phase conveying systems based on product characteristics, flow capacity, hygiene requirements, and layout considerations to ensure smooth and reliable bulk material movement.

AMH Technologies Storage Silo Design Guide

Control System

AMH Technologies Storage Silo Design Guide

Control System