Xufeng OS-F6 Petroleum Product Oxidation Stability Tester

Overview

The Xufeng OS-F6 Petroleum Product Oxidation Stability Tester is an engineered benchtop instrument designed for accelerated oxidation testing of hydrocarbon-based fluids under controlled thermal, oxidative, and flow conditions. It operates on the principle of forced-air oxidation in a thermostatically stabilized bath, where samples are subjected to elevated temperature, regulated oxygen flow, and defined pressure to simulate long-term aging mechanisms. The system complies with internationally recognized standard test methods—including SH/T 0175 (China), ASTM D2274 (distillate fuel oils), ISO 12205 (fuel oil stability), GB/T 12581 (inhibited mineral oils), and ASTM D943 (oxidation induction time for turbine oils)—ensuring data comparability across global laboratories and regulatory submissions.

Key Features

• Triple-integrated architecture: independent thermostatic bath, light-shielded oxidation chamber, and microprocessor-controlled electrical cabinet—each constructed from electropolished 316 stainless steel for corrosion resistance and cleanability.
• High-precision temperature regulation: PID-controlled heating system with immersion-style heater inside a circulation cylinder ensures uniform heat transfer; combined with forced vertical/horizontal fluid mixing, it achieves ±0.1°C temperature fluctuation and uniformity across the 500 × 190 × 424 mm bath volume.
• Dual-flow calibration capability: configurable with either domestic or imported mass-flow meters—enabling selection between broad-range (1.0–4.0 L/h) or high-resolution (5–50 mL/min) oxygen delivery, optimized for either fuel stability screening or precision turbine oil evaluation.
• Automated water level management: float-switch–actuated solenoid valve maintains consistent bath fill level; overflow drains directly to waste line, eliminating manual top-up and minimizing operator intervention during multi-day tests.
• Robust failure-response protocol: integrated triple-failure detection (power loss, water depletion, gas supply interruption) triggers immediate shutdown and logs event timestamp; upon restoration, the system resumes operation from last valid state without user reconfiguration.
• Comprehensive diagnostics and traceability: real-time display of setpoint/actual temperature, cumulative test duration, start/interruption dates, and fault codes—including sensor open/short, heater open-circuit, and low-pressure alerts—supporting GLP-compliant recordkeeping.

Sample Compatibility & Compliance

The OS-F6 accommodates diverse petroleum product classes requiring oxidation assessment per industry-standard protocols. Its dual-mode configuration supports both mineral-oil-based lubricants (e.g., turbine oils, hydraulic fluids, circulating oils) per GB/T 12581 and ASTM D943, as well as distillate fuels (diesel, jet fuel, heating oil) per SH/T 0175 and ASTM D2274. The six-position oxidation tube rack allows parallel testing under identical environmental conditions, enhancing throughput and inter-sample reproducibility. All wetted surfaces contact only stainless steel or fluoropolymer components, preventing catalytic degradation or leaching. The instrument meets mechanical and electrical safety requirements per IEC 61010-1 and is suitable for installation in ISO/IEC 17025-accredited testing laboratories performing routine QC, R&D validation, or regulatory submission testing.

Software & Data Management

The OS-F6 employs embedded firmware—not PC-dependent software—to execute all control logic, timing, and alarm handling. All operational parameters (temperature setpoint, flow rate, pressure, elapsed time) are stored in non-volatile memory with battery-backed clock, ensuring uninterrupted logging during power outages. Event-driven data capture records timestamps for test initiation, interruptions, recovery, and completion. Exportable log files (via USB interface) contain ASCII-formatted entries compatible with LIMS integration and audit-ready documentation. While not FDA 21 CFR Part 11–certified out-of-the-box, the system’s deterministic behavior, immutable event logging, and hardware-enforced access controls provide foundational elements for laboratory-specific Part 11 compliance implementation—including electronic signature workflows and audit trail review procedures.

Applications

• Evaluation of antioxidant package efficacy in turbine oils and industrial lubricants.
• Comparative stability ranking of diesel fuel formulations prior to field deployment.
• Quality conformance testing of new batches against specification limits per ASTM D2274 or SH/T 0175.
• Research into oxidation kinetics under variable temperature/pressure/oxygen partial pressure conditions.
• Supporting root-cause analysis of field failures linked to premature sludge formation or acid number rise.
• Secondary use as a precision constant-temperature bath for kinematic viscosity measurements (ASTM D445) or other ASTM-defined bath-dependent tests.

FAQ

What standards does the OS-F6 fully support?
The OS-F6 is designed and verified to meet the apparatus requirements of SH/T 0175, ASTM D2274, ISO 12205, GB/T 12581, and ASTM D943—including dimensional tolerances, temperature stability, flow accuracy, and pressure control specifications.
Can the OS-F6 be used for both fuel and lubricant testing?
Yes—the instrument’s modular dark chamber, adjustable oxygen flow range, and dual-standard temperature profile capability enable seamless transition between distillate fuel (SH/T 0175) and inhibited mineral oil (GB/T 12581) test protocols without hardware modification.
Is the flowmeter calibration traceable to national standards?
Imported flowmeters are supplied with manufacturer-provided NIST-traceable calibration certificates; domestic units are calibrated in-house using master rotameters verified annually against certified reference standards.
Does the OS-F6 include data export functionality?
Yes—test logs and event histories are saved internally and exportable via USB flash drive in plain-text CSV format, supporting automated ingestion into laboratory information management systems (LIMS) or statistical process control (SPC) platforms.
What maintenance intervals are recommended?
Quarterly verification of temperature uniformity and flowmeter accuracy is advised; annual inspection of stainless-steel bath integrity, solenoid valve function, and pressure regulator response is recommended for sustained compliance with standard method repeatability requirements.