HMKFlow 329 Powder Flowability Angle of Repose Analyzer

Feb 17, 2018

Powder Angle of Repose

HMKFlow 329 is an apparatus of angle of repose usp 1174 used to measure the angle of repose of pharmaceutical powders. Powder angle of repose is part of  powder flow test. HMKFlow 329  conforms to US Pharmacopoeia Chapter USP 1174 and European Pharmacopoeia Chapter EP 2.9.36. It also meets ISO 4324 and agricultural fertilizers(ISO 8398). The angle of repose is the angle of the conical pile produced when a granular sample is poured onto a horizontal surface (test platform).

HMKFlow 329 Powder Angle of Repose Analyzer

HMKFlow 329 consists of a stand, funnel, stirrer, test platform and a digital height gage, having a range of 0-300 mm and an accuracy of 0.05 mm.

HMKFlow 329 Powder Flowability Angle of Repose Analyzer

HMKFlow 329 Powder Flowability Angle of Repose Analyzer

Pour sample into the funnel and stir the sample if necessary, the powder produce a cone on the test platform and use a digital gage measure the height of the pile. The tangent of the angle of repose (in degrees) can be determined by reading off the height of the powder cone in mm from the digital display of the height gage and dividing it by 50.

Table EUROPEAN PHARMACOPOEIA 2.9.36-1. – Flow properties and corresponding angles of repose

  • • 25-30° Angle of repose corresponds to Excellent flow property
  • • 31-35° Angle of repose corresponds to Good flow property
  • • 36-40° Angle of repose corresponds to Fair – aid not needed flow property
  • • 41-45° Angle of repose corresponds to Passable – may hang up flow property
  • • 46-55° Angle of repose corresponds to Poor – must agitate, vibrate flow property
  • • 56-65° Angle of repose corresponds to Very poor flow property
  • • >66° Angle of repose corresponds to Very, very poor flow property

Other powder flowability tester and angle of repose tester

Carr Indice Method
HMKFlow 6393 Powder Characteristics Tester

Funnel Method
AS-300 Hall Flowmeter
HMKFlow 309 Flowmeter




2 Responses

  1. […] HMKFlow 329 Powder Angle Of Repose Analyzer […]

  2. visitor
    2017/09/08 18:39:14

    We have a current business need to reduce historical variability of quality parameters for our calcined metal oxide powders and have observed visible differences in the feed coming from our Spray Dryer.

    We want to measure variability of our spray dried metal oxide material as it relates to the flow characteristics and angle of repose of the powders.

    We are searching for instruments that are simple to use, cost effective, and could be set up to be used in the field for best traceability and batch management. Automatic data collection is a plus.

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