A) Air Over Layer Test

The test is conducted to establish the onset temperature of exothermic activity of thin layers of material when exposed to elevated atmospheric temperatures. It replicates thin layer (up to 15 mm) deposits in any drying situation i.e. drier walls and roof where hot air rushes over its surface.

Not only is the air over layer test a necessity in evaluating whether current or proposed drying and process temperatures are safe, it can also confirm the possibility of using a higher temperatures to increase productivity.

Air Over Layer testing is conducted in accordance to the following procedure given by - Prevention of Fires and Explosions in Dryers – John Abbott

B) Bulk Powder Test

The test is conducted to establish the onset temperature of exothermic activity of a material when exposed to elevated atmospheric temperatures. It replicates small bulk deposits in any drying situation where air is naturally available.

Not only is the bulk powder diffusion cell test a necessity in evaluating whether current or proposed drying and process temperatures are safe, it can also confirm the possibility of using a higher temperature to increase productivity.

Bulk Powder testing is conducted in accordance to the following procedure given by - Prevention of Fires and Explosions in Dryers – John Abbott

C) Aerated Cell Test

The test uses the same bulk powder test cell but a lid is attached with a sintered glass base. Pre-heated air is then pushed through the sample mimicking a condition where there is a bulk of powder with large amount of air availability such as a fluid bed dryer or rotating dryer.

Aerated Cell testing is conducted in accordance to the following procedure given by - Prevention of Fires and Explosions in Dryers – John Abbott