SUNS YAW-2 Electro-Hydraulic Servo Compression Testing Machine with D-Type Fixture

Overview

The SUNS YAW-2 Electro-Hydraulic Servo Compression Testing Machine with D-Type Fixture is a high-capacity, precision-engineered system designed for static compressive strength evaluation of structural and construction materials. Built upon a robust electro-hydraulic servo architecture, it delivers closed-loop force control via real-time feedback from high-stability load cells and proportional servo valves. The system operates on the principle of controlled displacement-driven compression, where hydraulic actuation enables smooth, programmable load application across the full force range—without mechanical range switching. This architecture ensures consistent resolution and linearity from 1% to 100% of full-scale capacity (1000 kN, 2000 kN, or 3000 kN configurations), making it suitable for standardized compressive testing of concrete cylinders, cement mortar prisms, metallic compression specimens, and precast concrete elements under sustained or ramped loading protocols.

Key Features

• Electro-hydraulic servo control with full-force-range, single-resolution force measurement—no manual range switching required.
• Motorized platen adjustment enabling precise, repeatable specimen alignment and rapid setup between test cycles.
• Force-controlled loading mode compliant with ISO 7500-1 Class 1 accuracy requirements; force indication error ≤ ±1% of reading across 1–100% FS.
• D-type fixture configuration optimized for axial compression of cylindrical and cuboidal specimens per ASTM C39/C109, GB/T 50081-2002, EN 12390-3, and JIS A 1108.
• Integrated overload protection, emergency stop circuitry, and hydraulic pressure monitoring for operational safety and system longevity.
• Stiff, cast-iron frame with reinforced crosshead guidance ensures minimal deflection and high rigidity during high-load compression (up to 3000 kN).

Sample Compatibility & Compliance

The YAW-2 accommodates standard compression specimens including concrete cylinders (Ø150 × 300 mm, Ø100 × 200 mm), cement mortar cubes (40 × 40 × 40 mm), steel billets, and ceramic tiles. Its 300 mm platen spacing and 300 × 300 mm platens support both standard and oversized specimens within national and international dimensional limits. The system meets mechanical and metrological requirements of GB/T 50081-2002, ISO 4012, ASTM E9, ASTM C39, ASTM C109, EN 12390-3, and DIN 1048-2. It supports GLP-compliant operation when paired with audit-trail-enabled software and calibrated load cells traceable to NIM (National Institute of Metrology, China) or equivalent national standards bodies.

Software & Data Management

The embedded control software provides intuitive test programming—including multi-step load hold, ramp-hold-ramp sequences, and constant-rate compression—and real-time graphical display of force–displacement curves. All test data are timestamped and stored in CSV and XML formats compatible with LIMS integration. Optional software modules support 21 CFR Part 11 compliance, featuring electronic signatures, user access levels, and immutable audit trails for regulated QA/QC environments. Calibration coefficients, operator IDs, environmental conditions (if sensor-integrated), and pass/fail flags per test are automatically logged.

Applications

• Compressive strength determination of normal-strength and high-performance concrete per GB/T 50081-2002 and ASTM C39.
• Quality assurance testing of precast concrete components in manufacturing facilities.
• Research-grade evaluation of cementitious material behavior under sustained load (creep and long-term deformation studies).
• Mechanical property validation of structural metals, refractory bricks, and geopolymer composites.
• Third-party certification testing for construction material suppliers seeking ISO/IEC 17025 accreditation.

FAQ

What standards does the YAW-2 comply with for concrete compression testing?
It supports GB/T 50081-2002, ASTM C39, EN 12390-3, ISO 4012, and JIS A 1108—covering specimen geometry, loading rate, and reporting requirements.
Can the machine maintain constant load for extended durations?
Yes—its closed-loop servo hydraulics enable high-precision load holding (±0.5% of setpoint over 24 h) for creep and relaxation studies.
Is the D-type fixture interchangeable with other fixture types?
The base frame accepts optional fixtures (e.g., wedge-grip, flexure, or splitting-tension adapters) via standardized mounting interfaces.
What maintenance intervals are recommended for hydraulic system integrity?
Oil filtration and system pressure checks every 500 operating hours; full hydraulic fluid replacement every 2,000 hours or biannually, whichever occurs first.
Does the system support remote diagnostics or firmware updates?
Yes—via Ethernet-connected service port with secure SSH access; updates require authenticated credentials and version-locked validation.