Overview
Hall Flowmeter/Flow Meter AS-300 series are designed and manufactured to determine both flow characteristics (Hall Flow rate) and apparent density of free-flowing metallic powders as well as other powders in various particle size distributions with calibrated hall flow meter funnel (Orifice Diameter 01 inch/2.5 mm) according to International Standard ISO 4490 Metallic powders; Determination of flowability by means of a calibrated funnel (Hall flow meter).
Hall Flowmeter/Flow Meter AS-300 is divided into AS-300A automatic hall flowmeter and AS-300M manual hall flowmeter both determines flow rate according to international Standards:
ASTM B213
MPIF No. 3
ISO 4490
JISZ 2502
GB/T 1482
...
Hall Flowmeter/Flow Meter AS-300 determines apparent density according to international Standards:
ASTM B 212
MPIF No. 4
ISO No. 3923/1
ASTM B 417
...
Carney Funnel (Optional, Orifice Diameter 0.2 inch/5 mm) can only determine the apparent density of non-free-flowing powders in various particle size distributions.For this purpose it meets all the requirements of relevant international Standards incluidng ASTM B417, MPIF No.28 and ISO 3923/1.
Principle
Hall Flowmeter/Flow Meter AS-300 measures the hall flow of powders by the time taken by 50 gram of powders to pass standard funnel orifice designed in specific diameter according to relevant international norms.Such method is invented by E.J.Hall in 1945.With Hall flow funnel user can measure the flow rate as well as the apparent density of free-flowing powders.With Carney funnels user can only determine the apparent density of free-flowing powders.
Apparatus
● Hall Flowmeter/Flow Meter Funnel
Diameter of calibrated orifice is 0.1 inch/2.5mm. Hall funnel is made of stainless steel/brass with enough thickness and harness to prevent transformation and resist excessive corrosion of wear and tear. Hall funnel is used to determine the flow rate of metallic powders or other finely distributed powders which can freely flow through such orifice. It completely meets ISO4490, ISO3923-1, ASTM B 213, MPIF 4.
● Stand, base and collector
Stand is used to fix the funnel. Base is where stand and collector are installed and placed. Before test adjust the base until firm and horizontal without any vibration. Adjust the working height and fix with spanner, put the funnel on the stand. Put the collector on the base for powder collection.
● Balance
A balance suitable for weighing at least 50.0 g to the nearest 0.1 g.
● Stopwatch
To the accuracy of 0.1 second
● Density cup (25cc)
A stainless steel density cup (25cc) is provided in order to determine the apparent density of powders according to International Norm ISO3923/1 Metallic Powders-Determination of Apparent Density-Part I: Funnel Method or other relevant international norms.
● Carney Funnel (determine apparent density of non-free-flowing powders)
Diameter of calibrated orifice is 0.2 inch/5 mm. Carney funnel is made of stainless steel/brass with enough thickness and hardness to prevent transformation and resist excessive force of wear or tear. Carney funnel is used to determine the apparent density of metallic powders or other fine bulk powders which can not freely flow through standard Hall funnel (Dia 0.1 inch/2.5 mm). It completely meets ISO4490, ISO3923/1, ASTM B 417 and MPIF 28.
● Standardized Calibrating Powder/Chinese Emery Grit
The calibrating powder is used in calibration of the apparatus and then supplied as well in order to check the accuracy of the Hall Flow Meter. It is recommended that the flow rate be checked periodically, at least every six months, using the procedure outlined in relevant international Standards.
Applications
Hall flow meter-powders that pass funnel (Diameter 0.1 in/2.5 mm) freely
Apparent density- powders that pass funnel (Diameter 0.1 in/2.5 mm) freely
Apparent density-powders do not freely pass through the funnel (Diameter 0.1 in/2.5 mm), but do pass through Carney Funnel (Diameter 0.2 in/5mm).
Apparent density-powders fail to freely pass through the funnel orifice either Diameter 0.1 in/2.5 mm or Diameter 0.1 in/2.5 mm, user has to use AS-200 Scott Volumeter.
The applications of hall flow meter include powder metallurgy, metallic powders, food powders, cement powders, plastic powders, rubber powders, ceramic powders, pharmaceutical powders etc.
FAQs
28. What if the hall flow rate has changed from standard in ASTM B 213 Standard Test Method for Flow Rate of Metal Powders?
-According to international standard ASTM B 213 Standard Test Method for Flow Rate of Metal Powders,if the hall flow rate has changed from that stamped on the instrument,i.e. hall flow meter funnel, the new correction factor will be used to calculate the hall flow rate.
27. How long is it recommended by ASTM B 213 Standard Test Method for Flow Rate of Metal Powders to check the flow rate of hall flow meter funnel?
-ASTM B 213 Standard Test Method for Flow Rate of Metal Powders recommend the hall flow rate be checked using Chinese emery calibration powder periodically, at least every six months, using the procedure outlined in No.9 Calibration of Apparatus steps 9.1.1-9.1.5.
26.Does AimSizer attend the interlaboratory study of determining the flow rate of Chinese emery powder?
-The flow rate of Chinese emery powder was established by an interlaboratory study conducted by Subcommitte B09.02 in 1995.It represents the flow rate through the master flowmeter funnel that had been used in a previous interlaboratory study with the former Turkish emery calibration powder,which is no longer available.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 and supplied by qualified subcontractor according to International Standards in order to make the unit accurate and robust to satisfy the user's requirement at cost-effective basis.
AimSizer is also a major research participant in the interlaboratory study of the flow of Chinese Emery. Chinese Emery is used to calibrate a flowmeter funnel by the manufacturers.
AimSizer is also the original manufacturer of Chinese Emery according to ASTM B213 and other international standards using such certified reference material.
25. Where to stamp average of five flow times after calibrating hall flowmeter funnel using chinese emery?
-After testing chinese emery for 5 times,the average of five flow times after calibrating hall flowmeter funnel using chinese emery is usually stamped on the bottom of the hall flow meter funnel.
24.What factor will influence calibrating hall flow meter funnel other than normal procedures?
The flow rate of Chinese emery calibration powder is sensitive to moisture. Starting from the dried condition, it will absorb moisture from the ambient air as five (or ore) flow tests are performed. Flow times can vary dependent upon the humidity of the test area.
23. What extremes of 5 tests's difference during calibrating hall flow meter funnel by Chinese emery?
-For this part manufacturer of hall flowmeter funnel should use identifcal 50.0 g mass of emery for all the tests until 5 flow times, the extremes of which shall not differ by more than 0.4 s and record test results.
22. How many times is needed during calibrating hall flow meter funnel by testing Chinese emery?
-For this part manufacturer of hall flow meter funnels should use identical 50.0 g mass of emery for all the tests until 5 flow times.
21. Powder hall flowmeter funnel calibration procedures in astm b 213-second step?
-The calibration procedures of hall flow meter funnel take several steps, the second is to cool the emery to room temperature in a dessicator
20. Powder hall flowmeter funnel calibration procedures in astm b 213-second step?
-The calibration procedures of hall flow meter funnel take several steps, the second is to cool the emery to room temperature in a dessicator.
19. Powder hall flowmeter funnel calibration procedures in astm b 213-first step?
-The calibration procedures of hall flow meter funnel take several steps, the first one has to heat an open glass jar of Chinese emery in a drying oven at a temperature of 102 Celsius degree to 107 Celsius degree (215 to 225 Fehrenheit degree) for one hour.
18. Where to buy a hall flowemter funnel,stand and Chinese emery in ASTM B 213?
-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 and supplied by qualified subcontractor according to International Standards in order to make the unit accurate and robust to satisfy the user's requirement at cost-effective basis.
17. How to prepare apparatus in ASTM B 213 about hall flow meter funnel?
-Before determining the flow rate by hall flowmeter funnel, clean the hall flowmeter funnel with a clean dry toweling paper,then clean the hall flowmeter funnel orifice with a clean dry pipe cleaner.
16. What standard is applied when sampling in ASTM B213 about hall flow meter funnel?
-A quantity of powder sufficient to run the desired number of flow tests shall be obtained in accordance with Practices ASTM B 215.
15. What is the function of a Balance in apparatus of Hall Flow Meter (Funnel)?
-When user determines the flow rate of metal powders or other powders,a Balance is needed.It is used to weigh the mass of the powder to be tested.It is capable of weighing at least 50.0 gram and to the nearests 0.1 gram
14. What is the function of a Chinese Emery in apparatus of hall flow meter(funnel)?
-When we determine the flow rate of metal powders we need Chinese Emery.It is used to calibrate the flowmeter funnel.It is a standardized emery grit used to periodically checking the calibrationn accuracy of the hall flow meter funnel.When the accuracy of the hall funnel goes out of permitted tolerances,user has to purhcase a new hall flowmeter funnel for replacement.
13. What is the function of a Timing Device in apparatus of hall flow meter(funnel)?
-When we determine the flow rate of metal powders we need a Timing Device,it is usually a stopwatch capable of measuring the time taken by 50 gram of powders to pass the orifice of a hall flow meter funnel.Operator can also use other suitable device,however it has to measure to the nearest 0.1 second.
12. What is the function of a Base in apparatus of hall flow meter(funnel)?
-When we determine the flow rate of metal powders we need a Base, it is used to support the powder flowmeter stand.It should be a level,vibration free base in order to secure the test accuracy.
11. What is the function of a Stand in apparatus of hall flow meter(funnel)?
-When we determine the flow rate of metal powders we need a Stand,it is used to support the powder flowmeter funnel.
10. What is the relation between dimension of hall flowmeter funnel and Chinese Emery?
-The dimension shown in ASTM B213 for the flowmeter funnel including the orifice, are not to be considered controlling factors. Calibration with emery, as specified in ASTM B213 determines the working flow rate of the funnel.
9. What is the key apparatus being used in standard test method for flow rate of metal powders?
- Powder flowmeter funnel is the key apparatus in such method. It is a flowmeter funnel featuring an orifice at bottom. Such orifice is not ready after drilling, the manufacturer has to calibrate it in diameter.The diameter is 0.10 inches, i.e. approximately 2.54mm.
8. What is the significance and use of an Hall Flowmeter/Flow Meter Funnel?
-The standard test method for flow rate of metal powders may be part of the purchase agreement between powder manufacturers and powder metallurgy (P/M) part producer, or it can be an internal quality control test by either the producer or the end user.
7. Hall Flow Meter Funnel-What factor influence Flow Rate?
-Hall Flowmeter(Funnel) determines the flow rate of metal powders in powder metallurgy and other industries.
-Among all the factors which influence the metal powder flow rate the humidity and moisture content influence flow rate considerably.
-Wet or moist powders may not flow.
6. Hall Flow Meter (Funnel) Interparticle Friction by ASTM B213?
- Hall Flow Meter-The ability of a (metal) powder to flow is a function of interparticle friction. As interparticle friction increases, flow is slowed. Fine powders may not flow.
5. What is the significance and use of flow properties 1/4?
-Flow properties determine the rate and uniformity of die cavity filling, therefore determine the production rates and uniformity of compacted parts.
4. The scope of ISO 4490 about Hall Flowmeter/Hall Flow Meter
-The International Standard specifies a method for determining the flow rate of metallic powders, including powders for hardmetals, by means of a calibrated funnel (Hall Flowmeter).
-The method is applicable only to powders which flow freely through the specified test orifice.
3. The scope of ASTM B213 about Hall Flowmeter/Hall Flow Meter
-This test method covers the determination of the flow rate of metal powders and is suitable only for those powders that will flow unaided through the specified apparatus.
-The values stated in SI units are to be regarded as the standard (except for the flowmeter funnel, which is fabricated in inch-pound units). The values given in parentheses are for information only.
-This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate saftety and health practices and determine the applicability of regulatory limitations prior to use.
2. Principle of Hall Flow determination according to international standard ISO 4490 Metallic powders - Determination of flow rate by means of a calibrated funnel (Hall flowmeter)
-Measurement of the time required for 50 g of a metallic powder to flow through the orifice of a calibrated funnel of standardized dimensions.
1. Apparatus of Hall Flowmeter/Hall Flow Meter according to International Standard ISO 4490 Metallic powders - Determination of flow rate by means of a calibrated funnel (Hall flowmeter)
-Calibrated funnel
-Calibrated funnel has standard dimensions as per ISO 4490. The funnel shall be made of a non-magnetic, corrosion-resistant metallic material having sufficient wall thickness and hardness to withstand distortion and excessive wear.
