The air grader splits the incoming material into three fractions: acceptable material, coarse material (e.g., high density contaminants or wood particles of undesirable geometry such as needles, etc.) and material falling through the screen decks (mostly sand, minerals, glass, etc.). The product enters the suspension chamber (of the air grader) via a rotary valve and a central tube. Agitator arms distribute the material uniformly over the perforated plate through which air is drawn. Different grades of separation are achieved by varying the air velocity. The heavy coarse material is moved to the outside of the grader and leaves the suspension chamber via rotary valves. The accepted material is suspended in the air stream and separated from the air in high-efficiency cyclones.
Application
Particleboard industry
Separation of foreign materials such as sand, stones, metal or bark
Separation for core and surface particles
Separation of the flakes depending on the flake thickness
Customer benefits
Precise separation according to particle thickness
Excellent removal of heavy contaminants
Low maintenance costs
Safe and reliable design
Continuous and consistent separation at all operating modes
High capacities with one unit
Low exhaust volume
Technical features
Up to 85% of the air is recirculated while the remaining volume is cleaned before venting into atmosphere
High-efficiency cyclones
Explosion protection system conforming to ATEX
Air grader suspension chamber with:
Agitating device with continuous cleaning system
Quick change device for the upper screen
Conical drilled holes in upper screen deck