Dense phase pneumatic conveying involves the transfer of powders, granules, and other dry bulk materials through an enclosed pipeline. In dense phase conveying, particles are not suspended in the conveying air and are transported at high pressure and low velocity. This results in a more gentle delivery process for the products being conveyed. Abrasive, blended or friable materials usually require dense phase conveying.
Our exclusive air management system enhances efficiency, lowers overall resistance, decreases air pressure requirements and improves material flow by injecting air into the convey line via strategically placed Air Assists™. The unique design of the high-pressure Air Assist manifold prevents back-feeding, which can occur with low-pressure manifold systems.
• Gentle material handling
• Reduced product degradation & segregation
• Minimal component wear
• Decreased dusting
• Flexible routing
Why Choose Pressure Conveying
The system conveys materials at a relatively low speed to reduce material degradation, air consumption, and abrasion on pipeline, bend, and diverter contact surfaces.
Material conveyed by this method is loaded into a pressure vessel. When the vessel is full, compressed air is metered into the vessel. The compressed air extrudes the material from the pressure vessel into the conveying line and to the destination. Once the vessel and conveying line are empty, the compressed air is turned off and the vessel is reloaded. This cycle continues until all of the required materials have been transferred.
To overcome resistance in the conveying line, supplementary air injectors (also called air boosters or Air Assists™) can provide additional air to help maintain conveying velocity, transfer materials over long distances, and minimize line plugging. They can also be used to gently restart flow when materials are left in the line after the conveying cycle.
Why Choose Vacuum Conveying
This system is typically used to transfer powder and granules at a low rate (25 tph or less) for truck and/or railcar unloading.
This system uses a pressure vessel with a fluidizing bottom so it can handle semi-abrasive powders and fluidizable powders that need aeration to discharge into the conveying line. This method is not the ideal choice for fragile materials or materials containing large and/or variable particle sizes.