KR-730D Stainless Steel Angle of Repose Tester for Granular & Powder Flow Analysis
Surface active agents -Powders and granules – Measurement of the angle of repose
- Conical Funnel: A large-diameter glass or conical funnel to allow the powder to flow and form a cone.
- Funnel Nozzles/Orifices: Different sizes of nozzles can be used at the bottom of the funnel to control the rate of powder flow.
- Swiveling Funnel Closure: A mechanism, often a slider, to open and release the powder from the funnel to start the test.
- Test Platform/Base Plate: A platform, often a dish with a 100mm diameter, to collect the flowing powder and form a cone.
- Digital Height Gauge: A device used to measure the height of the powder cone’s peak from the platform.
- Digital Scale: Used in conjunction with a stopwatch to measure the powder flow rate.
- Stirrer: An optional rotating or manual stirrer is included for powders that are difficult to flow.
- Adjustable Height Stand: A stand that allows for the precise adjustment and locking of the funnel’s height, ensuring it is set at a standard height, such as 75mm.
- Stable Base with Spirit Level: A stable base with an integrated spirit level to ensure the device is perfectly level during the test.
- Powder Collecting Tray: A removable tray that collects the powder after it flows, for easy cleaning.
- Optional Stirrer: A manual or motorized stirrer may be used for powders that do not flow easily.
Product Details：
Product Overview
The KR-730D flowability test fixture is a fully stainless steel bench instrument engineered to quantify the angle of repose of fine powders, granules and pellet materials. The repose angle acts as a core physical indicator to judge powder friction, cohesion and free-flow performance, guiding silo storage design, mixing process adjustment and raw material incoming screening.
Following ISO 4324 and mainstream industrial test protocols, the device adopts gravity free-fall cone forming method. Operators pour samples through standardized funnel onto horizontal measuring plate, then read cone geometry via precision protractor to calculate repose angle. It is widely deployed in pharmaceutical labs, food processing factories, chemical raw material workshops, new energy powder R&D and third-party material testing institutions.
Core Product Highlights
- Full SUS304 Anti-Corrosion Integrated Structure
All contact components including feeding funnel, measuring tray, support stand and protractor are precision machined stainless steel. Smooth polished surface avoids powder adhesion and residue buildup, easy to wipe and clean after testing, compatible with acidic, oily and hygroscopic powder samples without rusting.
2.Adjustable Funnel Height & Standard Discharge Orifice
Vertical support columns support stepless height adjustment from 50mm to 200mm, matching different test standard requirements. Interchangeable outlet nozzles can be customized for fine dust and large granular materials to control uniform falling speed and prevent splashing during cone formation.3.Built-in Bubble Level & Stable Weighted Base
The circular base plate is equipped with a central spirit level and four fine-tune leveling feet, allowing users to calibrate absolute horizontal status before each test, eliminating angle deviation caused unbalanced placement and guarantee repeatable test data across parallel samples.4.Large-Scale Precision Protractor Gauge
Side-mounted semi-circular metal protractor covers full 0°–60° measuring range with clear engraved scale lines. Direct visual reading of cone slope angle without complex mathematical conversion, greatly cutting manual calculation errors during batch inspection.5.Ergonomic Manual Gate Discharge Mechanism
Sliding baffle structure at funnel outlet realizes instant start-stop of material flow, avoiding excessive sample dumping and irregular cone shape. Optional manual stirring rod is supplied for highly cohesive, agglomerated powders to smooth blanking.6.Compact Portable Bench Layout
Lightweight split assembly design enables easy disassembly and transfer between lab workstations. No power or air source required, fully manual operation, suitable for small QC labs and field sampling testing without complicated auxiliary equipment.
Complete Technical Parameter Table
| Parameter Item | KR-730D Standard Specifications |
|---|---|
| Main Body Material | SUS304 Stainless Steel |
| Standard Funnel Outer Diameter | 60mm (customizable sizes available) |
| Adjustable Funnel Drop Height | 50 ~ 200mm stepless adjustment |
| Measuring Tray Diameter | 100mm standard circular plate |
| Protractor Measuring Range | 0° ~ 60° |
| Standard Test Method | Gravity free-fall cone forming method |
| Matching Standard Norms | ISO 4324, GB/T 21060, USP 1174 |
| Complete Matching Accessories | Funnel, measuring platform, protractor, stirring rod, powder scoop |
Standard Complete Test Operating Steps
- Horizontal Calibration
Adjust four base leveling feet and observe the built-in bubble level until centered, ensuring the measuring tray is perfectly horizontal before sample testing.
- Sample Preprocessing
Dry and sieve powder samples to remove large agglomerates; keep specimens under standard lab temperature and humidity for 2 hours to eliminate moisture interference on flow performance.
- Funnel Loading & Controlled Blanking
Close the sliding gate, fill the funnel with sufficient homogeneous sample, then slowly pull the baffle open to let powder freely fall and form a stable conical pile on the central measuring tray.
- Angle Measurement & Data Recording
Wait until the cone shape stops changing completely, align the protractor with the cone slope surface to directly read the repose angle value. Conduct three parallel tests and take the average as final result.
- Flow Performance Classification
Classify powder fluidity according to measured angle value:
- ≤30°: Excellent free-flow property
- 30° ~ 40°: Good handling performance
- 40° ~ 45°: Moderate flowability
- ＞45°: Poor cohesive sticky powder
- Post-Test Cleaning
Scrape residual powder from tray and funnel with the matching stainless scoop, wipe all metal surfaces dry to avoid cross-contamination of different test batches.
Wide Industrial Application Fields
Pharmaceutical Raw Materials
API powder, medicinal excipients, tablet granule blends, capsule filling powder; evaluate blanking stability for tablet pressing and capsule filling production lines.
Food & Agricultural Industry
Food additive powder, flour, feed granules, fertilizer particles; analyze material conveying and silo arching risks during storage.
Chemical & New Energy Materials
Coating pigment powder, battery cathode/anode powder, ceramic raw material, detergent granules; optimize mixing and extrusion process parameters.
R&D & Third-Party Testing Institutes
University material labs, CNAS accredited inspection centers, factory QC departments; standard physical property testing for new powder formulation development.
Interpretation of Results
| Angle of Repose (°) | Flowability | Description |
|---|---|---|
| < 30° | Excellent | Free-flowing material |
| 30–40° | Good | Easy to handle |
| 40–45° | Fair | Moderate flow |
| > 45° | Poor | Cohesive or sticky powder |
Standard Factory Delivery Package
- KR-730D stainless steel angle of repose tester main stand
- Standard 60mm feeding funnel with sliding discharge baffle
- 100mm horizontal measuring tray assembly
- 0–60° precision metal protractor measuring component
- Auxiliary stainless steel stirring rod and powder collecting scoop
- Multi-language operation manual aligned with ISO standards
- Factory inspection qualification certificate
Global After-Sales & Distributor Support
We provide full remote test operation training and powder sample matching guidance, with long-term supply of replacement funnels and protractor parts. Custom funnel diameters and special height ranges are available for bulk order customers. Exclusive regional distributor policies include priority production scheduling, OEM private brand labeling and full sets of high-resolution English marketing images.
English Overlay Text For Product Pictures
Main Banner: KR-730D Stainless Steel Angle of Repose Flowability Tester
Control/Part Labels: Spirit Level / Adjustable Stand / Precision Protractor / Slide Discharge Gate
Feature Overlay Tags: Full SUS304 Construction / 50–200mm Adjustable Height / ISO 4324 Compliant / Manual No Power Required
Safety & Operation Tip: Clean All Stainless Parts After Each Sample Test
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