Siemens SITRANS WF100 Operating Instructions Manual page 18

Solid flowmeters

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Description

3.1 Material feed examples

Flowmeter in-feed chutes

The flowmeter in-feed chute delivers the material from the bin or feeder discharge to the

flowmeter flowguide. The ideal in-feed chute pre-conditions the material flow to minimize the

effect of abrasion, velocity variation, feeder discharge trajectory variation, and pulsing.

Feeder/flowguide transition

①

baffle plate

Short fall chute

①

< 0.6 m (2 ft)

• reverse flowguide transition reverses 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 rather than permitting material to be flung from the

feeder, directly into the flowguide

• transition is especially important for high or variable speed

feeders

• forward flowguide transition maintains the material in the same

direction between the bin or feeder discharge and the

flowmeter flowguide

• transition is acceptable for a low and constant velocity feeder

• if a forward flowguide transition must be used for a high or

variable speed feeder application, install a baffle plate

• material in-feed chute where the bin or feeder discharge to

flowmeter flowguide fall is less than 0.6 m (2 ft)

• material velocity due to gravity minimized

• chute centreline and angle should coincide with that of the

flowguide, for a distance greater than or equal to the flowguide

diameter (before the flowguide inlet)

Operating Instructions, 02/2012, 7ML19985NB01-01

SITRANS WF100

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