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Guangzhou Yanjin Instrument Equipment Technology Co., Ltd
Operating SOP for Bolefei Powder Flow Tester: From Sample Loading to Data Export
Date: 2025-12-12Read: 3
Bolefei Powder Flow TesterIt is a key equipment for evaluating the flowability, compressibility, and storage stability of powders, widely used in the pharmaceutical, food, and chemical industries. To ensure the accuracy and reproducibility of test results, it is necessary to strictly follow the Standard Operating Procedure (SOP). The following are the typical steps for testing:
1、 Preparation before testing
Environmental control: Ensure stable laboratory temperature and humidity (recommended 23 ± 2 ℃, RH 50 ± 5%), and avoid airflow interference.
Instrument calibration: Preheat for 15 minutes after turning on the machine, and perform self check on the operating force sensor and displacement system; Verify torque accuracy using standard weights.
Sample processing: The powder to be tested should be sieved (e.g. 60 mesh) to remove clumps, and if necessary, equilibrated in a humidifier for 24 hours.
2、 Sample loading
Fix the clean and dry test material cylinder vertically to the base, and install a breathable plate at the bottom.
Use the "funnel slow pouring method" to evenly add the powder into the hopper, avoiding compaction or bridging.
Fill to the specified height (usually 10 mm from the top), level the surface with a scraper, record the initial loose volume and mass, and calculate the loose density.
3、 Preprocessing and main testing
Pre compaction: Start the program, the impeller descends at a low speed (such as 0.1 rpm) at a constant speed, and apply standard pre compaction (such as 5 kPa) to the powder to eliminate filling differences.
Main shear test: According to the method setting (such as USP<1174>), collect shear curves under multiple normal stresses (such as 2-10 kPa). The instrument automatically records the relationship between shear stress and displacement.
Wall friction test (optional): Replace the material cylinder with a simulated equipment material (such as stainless steel) to measure the friction angle between the powder and the container wall.
4、 Data Processing and Export
After the testing is completed, the software automatically generates parameters such as flow function (FF), unconstrained yield strength (UCS), and principal stress.
Review the smoothness and repeatability of the curve, and eliminate outliers.
Export CSV or PDF reports via USB or network interface, including sample information, testing conditions, and key indicators, for batch release or process analysis.
5、 Cleaning and Shutdown
Immediately disassemble the material cylinder and impeller after testing, use a soft brush to remove residual powder, and avoid cross contamination. Wipe the surface of the instrument, turn off the power, and fill in the usage record.
Attention: Only use the same batch of secondary powder for each test; Avoid finger contact with the surface of the powder; Highly hygroscopic samples need to be handled in a glove box.
Standardize the implementation of thisBolefei Powder Flow TesterThe SOP can significantly improve the reliability of powder characterization data and provide scientific basis for formula development and production control.