Measuring Volatility with The Lubricating Oil Evaporation Loss Tester

Measuring Volatility with the Lubricating Oil Evaporation Loss Tester

Introduction
In high‑temperature applications such as engine crankcases and industrial gearboxes, lubricant volatility can lead to oil consumption, deposit formation, and changes in viscosity. The Lubricating Oil Evaporation Loss Tester from Changsha Friend Experimental Analysis Instrument Co., Ltd. quantifies the mass loss of a lubricant sample under controlled thermal and airflow conditions, providing a clear indicator of its resistance to evaporation.

Testing Principle
A precisely weighed oil sample (typically 10 g) is placed in a temperature‑regulated chamber—often set to 250 °C—through which a metered stream of dry air flows at a constant rate (e.g., 10 mL/min). Over a standardized duration (commonly 60 minutes), volatile fractions evaporate. Post‑test, the sample is re‑weighed; the percentage mass loss represents evaporation loss per ASTM D5800 or equivalent standards.

Technical Design Features

• Precision Temperature Control: A ceramic heating block with PID regulation maintains temperature within ±0.2 °C, ensuring consistent test conditions.

• Calibrated Airflow System: Mass‑flow controllers deliver a stable air stream, preventing fluctuations that could skew results.

• Integrated Analytical Balance: Positioned beneath the test chamber, it records initial and final weights without manual transfers.

• User‑Friendly Interface: A touchscreen guide walks operators through test setup, displays real‑time temperature and flow data, and exports results in digital reports.

Industry Applications

• Automotive R&D: Compare base‑oil blends and additive packages to minimize evaporation under engine conditions.

• Industrial Lubricant Certification: Verify batch compliance before market release.

• Marine and Power Generation: Assess turbine and compressor oils for long‑term service in high‑temperature environments.

Best Practices

1. Sample Pre‑Conditioning: Dry samples at 105 °C for 1 hour to remove moisture prior to testing.

2. Air Quality Maintenance: Use particle‑ and moisture‑free compressed air to prevent contamination.

3. Chamber Cleaning: Remove residual carbon deposits after each run to maintain heat transfer efficiency.

4. Routine Calibration: Verify balance accuracy and airflow calibration at regular intervals for reliable data.