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Dense Phase Systems
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For use with materials that are abrasive, friable or conveyed long distances. This system will move material at slow speeds, using smaller amounts of conveying air/gas in relationship to the material being conveyed at pressures generally ranging from 20 to 40 psig. The system reduces equipment wear and product degradation. High pressure gas is required for conveying.
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Dense Phase Batch System
System infeed is to a pressure tank that is an ASME coded vessel. The tank is sized for specific convey rates based on desired capacity and conveying distance. The convey cycle can be activated based on time, material level or weight.
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Dense Phase Continuous System
Continuous conveying is accomplished in one of three different methods.
- Side by Side Method: In applications with abrasive materials, pressure vessels are used as in a batch system, however, now two pressure vessels are required. In this method, the pressure vessels are mounted side by side and are fed by a single in feed. While one vessel is filling, the other vessel is in the convey mode. As the first vessel finishes its convey cycle the second vessel begins conveying and the first vessel refills.
- Stack-Up Method: This method also uses two pressure vessels. In this method one vessel is mounted on top of the second vessel. Conveying is accomplished by pressurizing and depressurizing the top vessel while the bottom vessel is continuously pressurized and conveying.
- High Pressure Rotary Airlock: This method is applicable for nonabrasive materials such as plastic pellets or fine powdered materials. The infeed is continuously discharged through the rotary valve and conveying is regulated by precise control of the conveying air/gas flow. Very slow convey velocities can be achieved thus reducing the degradation to its minimum level.
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