Pneumatic Conveying Systems for Material Transfer

Pneumatic Conveying Systems

Pneumatic Conveying Systems for Material Transfer

Convey Powders, Pellets, and Granules Over Long-Distances with Less Moving Parts

CMT Process Solutions designs and supplies advanced pneumatic conveying systems engineered for the efficient transport of bulk solids and powders. Our product range includes Dense Phase and Dilute Phase Pneumatic Conveyors, Pneumatic Conveying Venturi Eductors, Airslides, and other pressure and vacuum conveying systems. Leveraging extensive material-handling expertise, CMT engineers evaluate each material’s conveying characteristics to determine the optimal conveying mode—dilute or dense phase—and the appropriate gas mover, such as a blower, fan, or compressor.

þ Dense Phase and Dilute Phase
þ Increased Dust Control
þ Increased Efficiency

þ Increased Layout Flexibility

þ Positive Pressure or Vacuum Systems

þ Integrate with Existing Equipment

Pneumatic Conveving Systems Available

Dilute Phase Pneumatic Conveying

Dilute phase conveying uses a high-velocity airstream to suspend and transport dry bulk materials such as powders, granules, and pellets through a pipeline. This method operates at low pressure with continuous flow, making it ideal for light, non-abrasive, and free-flowing materials. It offers a simple, flexible, and cost-effective conveying solution commonly used in industries like food processing, plastics, and chemicals.

Dilute Phase Conveying Features:

Air Velocity: High (typically 3,000–8,000 ft/min or 15–35 m/s)
Pressure: Low (usually under 15 psig for pressure systems)
Material Concentration: Low — particles are suspended and carried in an air stream
Flow Behavior: The material is fully entrained in the moving air, resulting in continuous flow.
Suitable For: Light, non-abrasive, and free-flowing materials such as flour, plastic pellets, sugar, or fine powders.
Advantages:

Simple system design and lower initial cost
Continuous conveying with less risk of plugging
Flexible routing over long distances

Limitations:

Higher wear on pipelines and components
More energy consumption due to high air velocity
Not ideal for fragile or abrasive materials

Dense Phase Pneumatic Conveying

Dense phase conveying transports dry bulk materials at low velocity and high pressure, moving them through pipelines in compact slugs rather than suspended particles. This method minimizes wear, degradation, and dust, making it ideal for abrasive, fragile, or high-density materials like cement, fly ash, and sand. With its controlled, efficient flow, dense phase conveying is widely used in industries that demand precision and product integrity.

Dense Phase Conveying Features:

Air Velocity: Low (typically 400–1,500 ft/min or 2–8 m/s)
Pressure: High (up to 50 psig or more)
Material Concentration: High — materials move in dense plugs or slugs through the line
Flow Behavior: The material travels intermittently in batches, pushed by compressed air rather than suspended in it.
Suitable For: Heavy, abrasive, or fragile materials such as cement, sand, fly ash, or sugar crystals.
Advantages:

Minimal material degradation and pipeline wear
Lower air consumption and dust generation
Better suited for long-distance or high-capacity transfer

Limitations:

More complex design and higher capital cost
Requires precise control of air pressure and feeding

Components and Spare Parts

Fox Venturi Eductors

Fox Venturi Eductors are precision-engineered components used in pneumatic conveying systems to transport bulk solids, powders, and granules using compressed air—eliminating the need for mechanical feeders, rotary valves, or blowers at the feed point. Operating on the Venturi principle, these eductors utilize a high-velocity motive air stream to generate suction that entrains material and propels it through the conveying line efficiently and reliably.

HammerTek Smart Elbows®

HammerTek Smart Elbows® are specialized pipe fittings designed to reduce wear, product degradation, and dust generation in pneumatic conveying systems that transport bulk solids. Unlike conventional long/short radius elbows, smart elbows use a patented deflection chamber design that changes how material flows through a turn in the pipeline—making them highly effective for handling abrasive, friable, or high-velocity materials.

Pneumatic Conveying Magnets

In pneumatic conveying systems, magnets remove ferrous metal contaminants from dry bulk materials to protect equipment and maintain product purity. Installed at critical points such as hoppers or inline sections, they capture and hold metal fragments as materials flow through. This process prevents equipment damage, reduces downtime, and ensures consistent product quality and system efficiency.

Pneumatic Conveying Airslides

Pneumatic Conveying Airslides use low-pressure air to move fine powders like cement, fly ash, and alumina through a sloped channel. By fluidizing material over a porous membrane, they enable smooth, gravity-driven flow without moving parts. This efficient, dust-free system minimizes energy use and maintenance.

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