Material Feed Examples - Siemens SITRANS WF100 Operating Instructions Manual

Solid flowmeters

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Description

3.1 Material feed examples

3.1

Material feed examples

Screw conveyor

①

short pitch

②

double flight

Rotary feeder

Bucket elevators

• most common type of material feeder

• short pitch and/or double flight screws preferred to reduce the

batch size (and increase the frequency) of the material

discharge pulse, or cut back the flights of a standard screw so

it ends before the discharge opening

• use reverse flowguide transition for variable operating speeds

or constant speeds above 40 rpm

• provides an air seal between the upstream and/or downstream

process, and the flowmeter

• required if the material is pneumatically conveyed or

flowmeter/process isolation is required

• use reverse flowguide transition for variable operating speeds

or constant speeds above 10 rpm

• commonly used for grain applications

• feeder discharge damping required when slow elevators

(typically chain drive) produce heavily pulsing material

discharge

• use deadbox if required to reduce material velocity from fast

elevators (typically re-inforced belt drive)

Operating Instructions, 02/2012, 7ML19985NB01-01

SITRANS WF100

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