SUNS YAW Series Electro-Hydraulic Servo Compression Testing Machines

Overview

The SUNS YAW Series Electro-Hydraulic Servo Compression Testing Machines are engineered for high-precision, high-capacity static compression testing of structural and construction materials under controlled force and displacement conditions. Based on electro-hydraulic servo control architecture, these systems utilize closed-loop hydraulic actuation with real-time feedback from high-stability load cells and displacement transducers to ensure accurate force regulation across the full test range. The machines operate on the principle of controlled axial compression—applying uniaxial compressive loads to standardized specimens (e.g., concrete cylinders, cement mortar cubes, steel billets, or precast concrete elements) while recording force–displacement response in accordance with internationally recognized mechanical testing standards. Designed for laboratory, quality control, and third-party certification environments, the YAW series supports long-duration hold tests, ramp-hold-ramp profiles, and multi-step loading sequences essential for evaluating creep behavior, ultimate compressive strength, modulus of elasticity, and post-peak deformation characteristics.

Key Features

• Electro-hydraulic servo system with digital closed-loop force control, enabling stable load maintenance with ≤±0.5% of setpoint accuracy during extended hold periods (up to 72 hours).
• Self-propelled crosshead driven by precision worm-gear transmission—enabling rapid, backlash-free adjustment of platen spacing without manual intervention or tooling.
• Full-range, single-resolution force measurement: no range switching required across the entire 1000–20000 kN capacity, minimizing calibration discontinuities and improving data continuity.
• Robust dual-column frame with reinforced base and top platen assembly, optimized for minimal deflection (<0.05 mm/kN) under maximum load.
• Integrated safety interlocks including overload protection, emergency stop circuitry compliant with IEC 60204-1, and automatic pressure relief upon test completion or fault detection.
• Modular hydraulic power unit with variable-frequency pump drive, reducing energy consumption during low-load phases and ensuring quiet, stable operation.

Sample Compatibility & Compliance

The YAW series accommodates standard and non-standard compression specimens per ASTM C39/C39M (concrete cylinders), ASTM C109/C109M (mortar cubes), ISO 4012 (concrete strength), GB/T 50081–2002 (Chinese standard for concrete compressive strength), EN 12390-3, JIS A 1108, and DIN 1048-2. Specimen height up to 800 mm is supported within the adjustable platen gap; the large-format platens (720 × 1300 mm contact area, 2300 mm total height) allow simultaneous testing of multiple standard specimens or oversized structural elements such as hollow-core slabs or railway sleepers. All models comply with ISO 7500-1 Class 1 accuracy requirements for force measurement and ISO 5893 for displacement verification. System validation documentation supports GLP/GMP audit readiness and satisfies traceability requirements under ISO/IEC 17025.

Software & Data Management

Control and analysis are executed via SUNS TestMaster™ v5.x — a Windows-based, FDA 21 CFR Part 11–ready software platform supporting user role management, electronic signatures, and full audit trail logging. The interface enables programmable test profiles (including multi-segment ramp-hold, cyclic compression, and stress relaxation), real-time curve overlay, automatic peak detection, and export to CSV, PDF, or XML formats. Raw data files include timestamped metadata (operator ID, environmental conditions, calibration certificate IDs) and are stored in encrypted local databases with optional network backup. Software modules support automated report generation aligned with GB/T, ASTM, and ISO template structures—including customizable header/footer fields and integrated pass/fail logic based on user-defined acceptance criteria.

Applications

• Compressive strength evaluation of Portland cement concrete, high-strength concrete, fiber-reinforced concrete, and ultra-high-performance concrete (UHPC).
• Mechanical characterization of precast concrete elements, autoclaved aerated concrete (AAC), and lightweight aggregate blocks.
• Quality assurance testing of structural steel components, cast iron samples, and composite laminates under monotonic compression.
• Research-grade investigation of time-dependent behavior—including sustained load testing for creep compliance and stress relaxation modeling.
• Certification testing for building material suppliers seeking CE marking, CCC certification, or accreditation under CNAS (China National Accreditation Service).

FAQ

What standards does the YAW series support for concrete compression testing?
ASTM C39, C109, ISO 4012, EN 12390-3, GB/T 50081–2002, JIS A 1108, and DIN 1048-2.
Is the system suitable for long-term load-holding applications?
Yes—engineered for continuous load maintenance up to 72 hours with ≤±0.5% deviation from target force.
Can the machine be integrated into an existing LIMS or MES environment?
Yes—TestMaster™ supports OPC UA and RESTful API interfaces for bidirectional data exchange with laboratory information management systems.
What is the typical lead time for factory calibration and installation support?
Standard delivery includes ISO/IEC 17025–traceable calibration certificates; on-site commissioning and operator training are available as optional services.
Does the system meet regulatory requirements for pharmaceutical or medical device material testing?
While primarily designed for construction and metallurgical applications, configurations meeting USP , ISO 13485, and GMP Annex 15 requirements are available upon request with enhanced documentation packages.