Dilute Phase Systems
Dilute Phase Pressure System
Frequently the most economical concept and has its greatest advantage when using a single intake point and conveying to multiple discharge points. Infeed device is generally a rotary airlock feeder. Termination of the system usually requires a cyclone, bin vent or receiver filter. A positive displacement blower is generally used to convey at high velocities using higher air flows at pressures under 15 psig.
Dilute Phase Vacuum System
This type of system is most suitable for applications requiring multiple intake points, railcar unloading, blending or bag dumping. These systems are considered to be the cleanest design, and with certain variations, can handle friable and temperature sensitive materials economically. System termination is usually a receiver filter. Material is conveyed using a vacuum producing positive displacement blower to transport the material at low material to air ratios with vacuums under 14" hg and velocities less than in a positive pressure system. This type of system can become distance constrained.
Dilute Phase Pressure/Vacuum System
This system is versatile in that it uses one positive displacement blowe to convey material. It is most advantageous in railcar unloading to storage silo or where multiple intake points and multiple discharge points need to be served
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