Pneumatic Convey of Difficult Materials

Some raw materials are difficult to transport by traditional pneumatic systems. Raw materials categorized problematic can be oily, sticky, hygroscopic or heat sensitive or have a high oxidation potential.

Possible solutions are:

  • Use dry air as transport media
  • Use dry and cold air as transport media
  • Adjust the product/air ratio
  • Ensure that no condensation takes place in the transport pipe by insulation/tracing
  • Use nitrogen as cooling agent
  • Nitrogen as transport media to avoid oxidation
  • Modify powder intake system if needed
  • Test products expected to be difficult in a pilot pneumatic system
  • Design the pneumatic system based on test results



It is important to collect process and product information,
in order to design the correct pneumatic system for difficult raw materialspneumatic-topfront

  • Room temperature and humidity variation in actual production area
  • Transport distance bendings and pressure drop
  • Raw material temperature variation
  • Raw material particle size distribution
  • If needed, trial results from pilot plant
  • Product data sheet
  • Physical analyses (Flow ability, density etc.)