Date：2015-04-17 Traffic：4874
| Overview | ||
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AS-300 Hall Flowmeter (Funnel) /Hall Flow Meter (Funnel) determines both Flow Rate and Apparent Density. It is applicable to both free-flowing metallic powders and other fine powders testing. The testing is performed with a calibrated hall flowmeter funnel according to International Standards
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As for non-free-flowing powers,Option A includes a Carney Funnel (Dia.5.0 mm) according to International Standards ● ASTM B417 Standard Test Method for Apparent Density of Non-Free-Flowing Metal Powders Using the Carney Funnel ● Metallic powders - Determination of apparent density - Part 1 Funnel method ● MPIF No.28 |
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as-300-hall-flow-meters-funnels-for-metal-powder-testing
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hall-flow-meter-funnel-products-price-manufacturers
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| Principle | ||
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● Measure Flow Rate by a Hall Flow Meter Funnel AS-300 Hall Flowmeter Funnel determines hall flow rate. The test is operated by measuring the time taken by 50 gram of a metal powder to flow through a hall flowmeter funnel. The funnel is calibrated on the orifice(0.1 inch/2.5mm) by standardized Chinese Emery according to International Standards ASTM B213/ISO 4490 in order to get 40+-0.5 second flow rate. ● Measure Apparent Density of free-flowing powders by a Hall Flow Meter Funnel AS-300 determines apparent density of free-flowing powders. Permitting a volume or certain quantity of powder in a loose condition to flow from a hall flowmeter funnel orifice Diameter 0.1 inch/2.5mm. The powders flow into a specified density cup of calibrated volume(25cc) under controlled conditions. The mass of powder per unit volume (the ratio between the mass and the volume) is recorded and reported as apparent density. ● Measure Apparent Density of non-free-flowing powders by a Carney Funnel AS-300 determines apparent density of non-free-flowing powders. Permitting a volume or certain quantity of powder in a loose condition to flow from a Carney Funnel diameter 0.2 inch/5.0mm into a specified density cup of definite volume(25cm3) under controlled conditions. The mass of powder per unit volume (the ratio between the mass and the volume) is recorded and reported as apparent density. Carney funnel is not calibrated and for purpose of measuring the apparent density only. |
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| Apparatus | ||
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● Powder Hall Flowmeter Funnel/Calibrated flowmeter funnel ● Stand and horizontal vibration-free base ● Density cup/Cylindrical Cup ● Timing Device/Stopwatch ● Chinese Emery Grit ● Carney Funnel ● Balance ● Spatula ● Wire (Above apparatus are subject to AimSizer quotation) |
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| Applications | ||
| Powder metallurgy, metallic powders, food powders, cement powders, plastic powders, rubber powders, ceramic powders, pharmaceutical powders,foundry,casting,metalworking, etc. | ||
| Demo Video | ||
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| hall flow meter | ||
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| Manufacturer | ||
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-AimSizer Scientifc is a world leading and reliable manufacturer of Hall Flowmeter/Hall Flow Meter Funnels and Carney Funnels. All the metallic parts are processed stringently according to International Standards in order to make the unit an accurate and standardized.
-AimSizer is a major research participant in the interlaboratory study of the flow of Chinese Emery. Chinese Emery is used to calibrate a hall flowmeter funnel by the manufacturers. -AimSizer is also the original manufacturer of calibration powder Chinese Emery |
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| How To Use An AS-300 Hall Flow Meter | ||
| The bottom of the Hall Flowmeter funnel orifice is approximately 25mm (1 in.) above the top of the density cup when the apparatus is assembled. | ||
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| The test specimen shall be tested as sampled. | ||
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| The test specimen shall consist of a volume of approximately 30 to 40 cm3 of metal powder. | ||
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| Report the results as apparent density, Hall (ADH) to the nearest 0.01 g/cm3 | ||
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| Calculate the apparent density as follows: where: | ||
| ADH=M/V | ||
| where: | ||
| M= mass of powder in the density cup, g. | ||
| V= volume of the density cup, cm3 | ||
| ADH= apparent density, Hall | ||
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| Transfer the filled density cup to the balance and weigh to the nearest 0.01 g to determine the mass, M, of powder. | ||
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| After the leveling operation, tap the density cup lightly on the side to settle the powder to avoid spilling during transfer. Wipe off any powder sticking to the outside wall of the cup. | ||
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| Using a nonmagnetic spatula with the blade held perpendicular to the top edge of the cup, level off the powder flush with the top of the density cup. Take care to avoid jarring the apparatus at any time. | ||
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| After the powder has completely filled the cup and has begun to overflow the periphery of the density cup, rotate the funnel approximately 90 degree in a horizontal plane so that the remaining powder falls away from the cup. | ||
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| Carefully load the test specimen into the flowmeter funnel and permit it to run into the density cup through the discharge orifice. Take care not to move the density cup. | ||
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| Weigh the empty density cup to the nearest 0.01 g or, alternatively, place the empty cup on the balance and tare the balance to zero. | ||
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| It is recommended that the use of a funnel be discontinued after the flow rate of the emery has increased such that the time of flow is less than 37 s | ||
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| Clean the orifice and avoid scratching during cleaning. | ||
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| A plating of soft powder upon the orifice. | ||
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| The powder flows slower and the powder flow rate has decreased. | ||
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| A new correction factor may be used. | ||
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| It is probable that repeated use has burnished the orifice. | ||
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| The powder flows faster and the powder flow rate has increased. | ||
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| Report the corrected flow rate in seconds to the nearest second. | ||
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| Multiply the elapsed time by the desired correction factor. | ||
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| Calculate the correction factor by dividing 40.0 by either the flow rate shipped along with the unit or the new calibration flow rate determined according to calibration procedure. | ||
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| More than one flow may be run if desired. Use a fresh 50.0 g quantity of powder for each flow test. Average the flow times. | ||
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| Record the elapsed time to the nearest 0.1 s. | ||
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| Stop the stopwatch the instant the last of the powder exits the orifice. | ||
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| If the powder fails to start flowing, one light tap on the funnel rim is permitted. Further tapping of the funnel, however, or poking or stirring of the powder in the funnel with a wire or any other implement is not permitted. | ||
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| Simultaneously start the stopwatch and remove your finger from the discharge orifice. | ||
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| Place the emptied weighing dish on the flowmeter stand directly under the funnel orifice. | ||
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| Carefully pour the 50.0 g sample of powder into the center of the flowmeter funnel without any tapping, vibration or movement of the funnel. | ||
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| Block the discharge orifice at the bottom of the funnel with a dry finger. | ||
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| Weigh out a 50.0 g mass of powder, as sampled, into a clean weighing dish. | ||
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| The determination shall be carried out on three test portions. | ||
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| Immediately before the test, weigh out a 50+-0.1 g test portion. | ||
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| In general, the powder shall be tested in the as-received condition. In certain cases, and after agreement between the supplier and user, the powder may be dried. However, if the powder is susceptible to oxidation, the drying shall take place in a vacuum or in inert gas. If the powder contains volatile substances, it shall not be dried. | ||
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| The mass of the test sample shall be at least 200 g. | ||
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| Control the height to 25mm from density cup to the funnel orifice during measuring the apparent density | ||
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| A cylindrical brass cup having a nominal capacity of 25 cm3.The actual cup volume shall be determined according to Test Method ASTM B873. | ||
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| A balance suitable for weighing at least 50.0 g to the nearest 0.1 g. | ||
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| An emery powder used to calibrate the flowmeter funnel. | ||
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| A stopwatch or other suitable device capable of measuring to the nearest 0.1 s | ||
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| A level, vibration free base to support the powder flowmeter stand. | ||
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| A stand to support the powder flowmeter funnel. | ||
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| A flowmeter funnel having a calibrated orifice of 2.5mm in diameter. | ||
| Frequently Asked Questions | ||
| • What is a Carney Funnel? | ||
| • Does standard test method determine the flow rate of all the metal powders? | ||
| • Apparatus of Hall Flow Meter according to ISO 4490 about apparent bulk density? | ||
| • What is a hall flow meter used for? | ||
