Classification of pneumatic conveying systems — Part I, System type
At present, there are no industry standards for classifying pneumatic conveying systems. The systems shown throughout engineering literature and in equipment suppliers' brochures are de- scribed by various terms -- vacuum, negative pressure, positive pressure, low pressure, medium pressure, high pressure, low velocity, high velocity, dilute phase, dense phase, and medium phase. Some terms describe the type of airstream the system uses to convey material, other terms describe the degree of material concentration in the system's conveying phase.
This two-part article discusses some basic terms used to describe pneumatic conveying systems. Part I classifies pneumatic conveying systems by system type. Part II, which will appear in the April issue, classifies pneumatic conveying systems by material conveying phase.