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Short Fall Chute
<0.6 m (2ft)
Long Fall Chute
>0.6m (2ft)
Dogleg
Deadbox
Page 16
•
A short fall chute is when the bin or feeder
discharge to flowmeter flowguide fall is less than
0.6 m (2 ft) from the material infeed.
•
The short fall chute present ideal measurement
conditions because material velocity due to gravity
is minimum.
•
The chute center line and angle should coincide
with that of the flowguide for a distance greater
than or equal to the flowguide diameter (before
the flowguide inlet).
•
A long fall chute is when the bin or feeder
discharge/flowguide fall is more than 0.6 m (2 ft)
from the material infeed.
•
The long fall chute presents problematic
conditions because material velocity is increased,
increasing flowmeter component abrasion.
•
Increased distances after chute-angle changes (to
settle material into desirable flow patterns) are
also required.
•
Use a dogleg to reduce the detrimental effect of
high or variable material velocity, and when a long
fall chute is used.
•
For abrasive material, line the chute with an
abrasion resistant material or use an in-feed
deadbox.
•
Install a deadbox where the chute angle changes,
causing the material to strike upon itself, rather
than on the chute surface
•
Deadboxes conditions:
•
•
•
•
Locate deadboxes where long-fall chute angles
change.
Milltronics Millflo – INSTRUCTION MANUAL
high feeder discharge velocity
variable discharge
abrasive material
7ML19985CS01
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