Brookfield PFT Powder Flow Tester - III.2 Sample Trough

AMETEK Brookeld Page 21 Manual No. M09-1200-F1016
Moisture in the sample is one of the primary factors to be aware of when working with powders
because it can have a serious impact in making the powder more cohesive, and therefore
lessfree-owing.Thepotentialforthepowdertotakeonmoisture(eitherbyadsorptionor
absorption)isafactorthatcanaffecttestresults.ThePowderFlowTesterhas theoptional
capabilitytoaccommodateahumiditysensor(PartNo.PFT-607Y)whichplugsintotheback
of the instrument.
Temperature may have some impact, but certainly plays less of a factor compared to humidity.
ThePowderFlowTesterhastheoptionalcapabilitytoaccommodateatemperaturesensor(Part
No.DVP-94Y)whichalsoplugsintothebackoftheinstrument.
Consider all environmental issues in your test area before proceeding with your test plan.
III.2 Sample Trough
There are two sizes of Troughs available for use with the PFT: The Standard Trough and the
Small Sample Volume Trough.
FigureIII-2showstheStandardSampleTrough(PartNo.PFT-400)whichcomeswiththePFT.
The trough is made of aluminum and is of annular shape for containment of sample. In the
bottomofthetroughisaPerforatedScreen(PartNo.PFT-440)whichholdsthesampleinplace
so that the powder particles on the bottom do not slide on the smooth metal surface when the
trough rotates.
Perforated
Screen
Figure III-2: Sample Trough
WhentheStandardTroughislledtolevel,itholds230ccofsamplematerial.Whenusedwith
theStandardVaneLid,theadditionalvolumerequiredfortheLidincreasesthetotalsamplesize
to 263 cc of material.
TheSmallSampleVolumeTrough(PartNo.PFT-405)isofthesamematerialasthestandard
trough.TheSmallTroughrequires38ccofsamplematerialwhenlledtolevel.Whenused
with the Small Vane Lid, the total sample size increases to 43 cc.