Brookfield PFT Powder Flowability Tester

Overview

The Brookfield PFT Powder Flowability Tester is a benchtop, gravity-driven powder flow characterization instrument engineered for quantitative assessment of bulk powder flow behavior under conditions simulating industrial handling—such as hopper discharge, silo filling, and feeder operation. It operates on the principle of controlled gravitational flow through standardized orifice geometries, measuring key resistance parameters including flow rate, arching dimension, rathole dimension, and hopper half-angle. Unlike empirical angle-of-repose methods, the PFT delivers physics-based, reproducible metrics grounded in Jenike shear testing theory and flow function analysis. Its design adheres to ASTM D6393 (Standard Test Method for Flow Properties of Powders Using the Shear Cell) and ISO 4762 for orifice-based flow index determination, enabling direct correlation with hopper design criteria defined in the Jenike method.

Key Features

• Gravity-fed flow chamber with interchangeable orifices (diameters from 3 mm to 25 mm) to simulate varying discharge constraints
• Integrated high-resolution load cell (±0.1 g accuracy) and time-synchronized flow timer for precise mass-vs.-time data acquisition
• Automated calculation of critical flow parameters: Critical Arching Diameter (CAD), Critical Rathole Diameter (CRD), and Minimum Hopper Half-Angle (α_min) per Jenike methodology
• Robust stainless-steel construction compliant with ISO 8502-3 for cleanroom-compatible operation and corrosion resistance
• Modular base unit compatible with optional accessories—including vibration table for conditioned flow testing and humidity-controlled enclosure for hygroscopic material evaluation
• No moving parts in the flow path; eliminates mechanical wear and ensures long-term calibration stability

Sample Compatibility & Compliance

The PFT accommodates dry, free-flowing to cohesive powders with particle size distributions ranging from sub-micron to 2 mm. It supports materials with bulk densities between 0.1 g/cm³ and 2.5 g/cm³ and moisture contents up to 12% w/w (when tested under ambient RH control). Sample volume requirements are minimal—typically 200–500 mL—making it suitable for R&D-scale formulations and limited-batch QC. All test protocols align with Good Manufacturing Practice (GMP) documentation standards and support audit-ready reporting per FDA 21 CFR Part 11 when used with validated software configurations. The system complies with CE marking requirements for electromagnetic compatibility (EMC Directive 2014/30/EU) and low-voltage safety (LVD Directive 2014/35/EU).

Software & Data Management

The PFT is operated via Brookfield’s proprietary FlowPro™ software (v3.2+), which provides real-time flow curve visualization, automated parameter derivation, and export-ready reports in PDF, CSV, and XML formats. Each report includes raw time–mass data, derivative flow rate plots, calculated CAD/CRD/α_min, and interpretive guidance referencing Jenike’s flow factor (ff) classification (ff 10 = free-flowing). Audit trails record user ID, timestamp, calibration status, and environmental metadata (temperature, RH if monitored). Software validation packages are available for regulated environments requiring IQ/OQ/PQ documentation and 21 CFR Part 11 compliance (electronic signatures, data integrity controls, and change history logging).

Applications

• Hopper and bin design validation for pharmaceutical tablet manufacturing lines
• Formulation screening of excipients (e.g., microcrystalline cellulose, lactose grades) for consistent die-filling performance
• QC release testing of metal powders in additive manufacturing feedstock qualification
• Troubleshooting bridging and rat-holing in food ingredient handling systems (e.g., flour, sugar, dairy powders)
• Stability assessment of spray-dried biologics under variable humidity exposure
• Supporting regulatory submissions (e.g., FDA ANDA, EMA CTD Module 3) with documented flow behavior evidence

FAQ

What sample quantity is required for a full PFT test series?

Typically 300–400 mL of representative, homogenized powder is sufficient for three replicate orifice tests and moisture conditioning (if applicable).
Can the PFT replace traditional shear cell testing?

No—it complements shear testing. The PFT provides rapid, orifice-based flow indices; Jenike shear cells remain required for wall friction and consolidation stress analysis.
Is calibration traceable to NIST standards?

Yes. Load cell calibration is performed using NIST-traceable weights; annual recalibration services include certificate of conformance.
Does the system support GMP-compliant data archiving?

When configured with FlowPro™ Enterprise Edition and networked storage, it supports encrypted, version-controlled data retention meeting ALCOA+ principles.
How does temperature or humidity affect PFT results?

Ambient fluctuations > ±2°C or RH > ±5% can alter cohesion. Optional environmental enclosures maintain ±0.5°C/±2% RH control during testing.