Yuhantest YH-FB4B Four-Point Bending Tester for Filtration Media

Overview

The Yuhantest YH-FB4B Four-Point Bending Tester is a precision electromechanical testing system engineered for structural integrity evaluation of rigid filtration media—particularly corrugated steel roofing panels (commonly referred to as “color-coated steel sheets”) used in industrial air and liquid filtration housings, HVAC ducting, and modular filter frame assemblies. Unlike three-point bending, the four-point configuration applies two symmetrically spaced loading points between two outer support points, generating a uniform moment region across the central span with negligible shear contribution. This geometry enables highly repeatable measurement of flexural modulus, yield strength, ultimate bending load, and plastic deformation behavior under ASTM D790, ISO 178, and GB/T 9341-compliant test protocols. The system integrates high-resolution force transduction, sub-micron displacement tracking, and closed-loop servo control to ensure metrological traceability and inter-laboratory reproducibility—critical for QC/QA labs validating material conformity prior to filter module assembly.

Key Features

• Robust dual-column frame with reinforced crosshead and precision-ground guide rails, supporting up to 50 kN static load capacity and maintaining alignment stability over extended duty cycles.
• High-fidelity load cell calibrated to ±0.5% FS accuracy, compliant with ISO 7500-1 Class 0.5 requirements for force measurement uncertainty.
• Adjustable four-point bending fixture set: includes interchangeable support anvils (standard span: 100–500 mm), hardened steel loading rollers (R5–R25 arc radii), and quick-release clamping mechanisms—fully configurable per ASTM D790 Annex A1 or customer-defined geometries.
• Panasonic AC servo drive paired with TBI preloaded recirculating ball screws ensures smooth, low-noise motion control across the full speed range (0.001–500 mm/min), with position repeatability ≤ ±0.005 mm.
• Dual-mode operation: real-time local control via 7-inch color TFT touchscreen (with intuitive icon-based menu navigation) and synchronized PC-based software interface for advanced parameter scripting and multi-user access management.
• Comprehensive hardware safety architecture: dual-limit mechanical stops, programmable overload cutoff (110% FS), emergency stop circuit meeting IEC 60204-1 Category 3 requirements, and automatic thermal/current fault diagnostics.

Sample Compatibility & Compliance

The YH-FB4B accommodates flat, laminated, or corrugated metallic and composite filtration substrates ranging from 0.3 mm to 3.0 mm thickness and up to 1000 mm wide. Fixture adaptability supports standard specimen dimensions per ISO 178 (80 × 10 × 4 mm bars) and custom profiles such as trapezoidal steel decking used in pleated filter support frames. All mechanical and software functions comply with GLP documentation standards—including electronic audit trails, user-level permission controls, and 21 CFR Part 11–ready data archiving when configured with optional digital signature modules. Calibration certificates are provided with NIST-traceable reference standards, and the system supports third-party verification against national metrology institute (NIM) guidelines.

Software & Data Management

The embedded test software delivers ISO/IEC 17025-aligned data acquisition and reporting functionality. Real-time plotting includes synchronized force–displacement, stress–strain, load–time, and deflection–time curves. Users define test methods using editable templates aligned with ASTM D790, ISO 178, GB/T 9341, and internal SOPs; each method stores fixture geometry, rate profiles, pass/fail thresholds, and post-processing algorithms (e.g., tangent modulus calculation, offset yield point determination). Raw data is saved in ASCII-compatible .csv and proprietary .yht binary formats, with metadata embedding operator ID, timestamp, environmental conditions (optional sensor input), and calibration history. Batch testing mode enables unattended sequential execution of identical protocols across multiple specimens, while comparative analysis tools permit overlay, scaling, and statistical deviation mapping across historical datasets.

Applications

• Validation of bending stiffness and failure modes in galvanized steel filter frames subjected to HVAC static pressure loads.
• Quality assurance of welded or bonded filtration panel assemblies during incoming material inspection.
• R&D evaluation of alternative substrate materials (e.g., aluminum composites, stainless-clad laminates) for corrosion-resistant filter housings.
• Mechanical durability assessment of pleated filter media support grids under simulated pulsating airflow conditions.
• Conformance testing for OEM specifications requiring documented flexural performance per EN 14351-1 (windows/doors) or ISO 6892-1 (metallic tensile properties).

FAQ

What standards does the YH-FB4B support for four-point bending tests?
ASTM D790, ISO 178, GB/T 9341, and EN 25270 are natively supported; custom standards can be imported via XML-based method templates.
Can the system perform both bending and torsion tests?
No—the YH-FB4B is optimized exclusively for flexural testing. For torsional characterization of filter housing fasteners or mounting brackets, refer to Yuhantest’s dedicated torsion tester series (e.g., YH-TS2000).
Is the software compatible with LIMS integration?
Yes—via configurable OPC UA or TCP/IP API endpoints; raw data export supports ASTM E1382-compliant structured metadata for seamless laboratory information management system ingestion.
What maintenance intervals are recommended?
Biannual verification of load cell linearity and crosshead alignment is advised; annual recalibration by an accredited metrology lab is required for ISO/IEC 17025 compliance.
Does the system include validation documentation for regulated environments?
Factory-installed IQ/OQ documentation packages are available upon request, including installation checklists, operational boundary verification reports, and electronic signature readiness assessment per 21 CFR Part 11 Annex 11 guidance.