Siemens milltronics C-40 Manuel D'utilisation page 7

Screw Conveyor
short pitch
double flight
Rotary Airlock Feeder
Feeder/Flowguide Transition
7ML19985DQ61
Short pitch and/or double flight screws are
preferred, reducing the batch size (and increasing
the frequency) of the material discharge pulses.
Alternatively, the flights of a standard screw may
be cut back, ending before the discharge opening.
Consider a reverse flowguide transition for
operating speeds above 40 rpm.
Rotary airlock feeders provide an air seal between
the upstream and/or downstream process and the
flowmeter. This may be required if:
Best results are obtained from rotary feeders with
more vanes, operating at higher speeds.
Consider a reverse flowguide transition for
operating speeds above 10 rpm.
A
direction of the bin or feeder material discharge
before the material enters the flowmeter
flowguide. Reversing direction forces the material
into a desirable flow pattern instead of permitting
material to be flung from the feeder directly into
the flowguide. This transition is especially
important for high or variable speed feeders.
baffle
A
plate
flowing in the same direction between the bin or
feeder discharge and the flowguide. This transition
is acceptable for a low and constant velocity
feeder. If a forward flow guide transition must be
used for a high or variable speed feeder
application, install a baffle plate.
Milltronics C-40 – INSTRUCTION MANUAL
• the material is pneumatically conveyed
• flowmeter/process isolation is required
reverse flowguide transition
forward flowguide transition
reverses the
keeps the material
EN-5