| Operation The vibratory
grader is suitable for universal use. Due to its design and
allowing the use of perforated or slotted sheets for grading,
the grader is easily adjusted to any type of fibrous material.
Due to fast removal of coarse screenings based
on a relatively high vibration frequency of the screening
basket and the chosen vibration amplitude being higher than
the maximum fibre length encountered, smooth operation without
any spinning or blocking will be feasible.
Improved removal of coarse screenings by use
of a baffle flap below the screening sheet.
Depending on the graded size, the pulp will pass through one
or two inlets towards the screening basket. Screened coarse
screenings are carried out through the screening basket projecting
from of the grader. In order to support the grading effect,
accepts are dammed by an adjustable overflow flap within the
tub.
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