DFYF-146 Lubricating Oil Evaporation Loss Tester (Noack Method, SH/T 0059 / ASTM D5800)

DFYF-146 Lubricating Oil Evaporation Loss Tester (Noack Method, SH/T 0059 / ASTM D5800)

1. Customer Pain Point + Solution

Pain Point:

For engine oil, transmission fluid, and industrial lubricant manufacturers, evaporation loss is a key indicator affecting high-temperature performance, fuel economy, and emission characteristics. If evaporation loss is excessive under high-temperature conditions, the following problems arise: increased oil consumption, requiring frequent top-ups; increased engine carbon deposits, affecting combustion efficiency and emissions; increased oil viscosity, degrading low-temperature startability; and poisoning or deactivation of catalytic converters and other after-treatment devices. How can you accurately and reliably determine the evaporation loss of lubricating oils at high temperatures, ensuring your products meet increasingly stringent environmental and performance regulations?

Our Solution:

The DFYF-146 Lubricating Oil Evaporation Loss Tester (Noack Method) is designed and manufactured in strict accordance with SH/T 0059 and ASTM D5800 standards. It adopts metal-bath heating control technology with a split-type structure. The instrument consists of independent units: a metal-bath heating system, a temperature control system, and a constant airflow pressure system — with a clear and logical layout. The evaporation bath is made of high-quality aluminum alloy, ensuring uniform heating and long-term durability. The main unit is equipped with a microcontroller-based precision temperature control system, with a range from ambient to 250°C and accuracy of ±0.5°C. The built-in automatic timer and test completion alarm eliminate the need for operator supervision. The inclined tube pressure is stable at 19 ± 2 Pa, fully meeting the constant airflow requirements of the Noack method and ensuring repeatability and reproducibility of test results.

Customer Value:

You no longer need to tolerate inaccurate evaporation loss data, cumbersome test procedures, or poor result repeatability. The DFYF-146 provides a comprehensive solution featuring split-type structure for convenient operation, uniform heating with an aluminum alloy bath, microcontroller-based precise temperature control, automatic timing with alarm, and stable airflow pressure — making evaporation loss testing simpler, more accurate, and the top choice for lubricant quality control.

2. Technical Parameters Table

3. Product Highlights

Split-Type Structure – Convenient Operation, Easy Maintenance
The instrument consists of independent metal-bath heating, temperature control, and constant airflow pressure systems — each module has a clear layout and well-defined function. Compared to integrated designs, the split-type structure facilitates routine maintenance and inspection. Users can replace or upgrade individual modules as needed, reducing long-term operating costs and maintenance complexity.

Aluminum Alloy Evaporation Bath – Uniform Heating, Long Service Life
The evaporation bath is made of high-quality aluminum alloy. The aluminum heating tape is tightly integrated with the constant-temperature alloy, ensuring uniform heat distribution across the bath. Combined with efficient insulation materials, heat loss is minimised and temperature stability is high, ensuring stable and reliable performance even after long-term use. The excellent thermal conductivity of aluminum alloy enables rapid temperature response, quickly reaching and stabilising at the set temperature.

Microcontroller-Based Precision Temperature Control – ±0.5°C Accuracy with Adjustable Correction
The main unit is equipped with a microcontroller-based control system with a temperature range from ambient to 250°C and accuracy of ±0.5°C. Users can set temperature correction values based on calibration results, achieving even more precise control. Compared to conventional temperature control methods, the microcontroller solution offers stronger anti-interference capability, lower failure rate, and superior long-term stability, ensuring every test is conducted under precise temperature conditions.

Automatic Timing + Test Completion Alarm – No Operator Supervision Required
The instrument features a built-in evaporation bath test timer that automatically starts timing upon test initiation. Upon test completion, an audible and visual alarm automatically alerts the operator. No continuous supervision is required — operators can attend to other tasks during the test, significantly improving laboratory efficiency.

Stable Airflow Pressure – Fully Compliant with Standard Requirements
The Noack method has strict requirements for constant airflow — the inclined tube pressure must be maintained at 19 ± 2 Pa. The DFYF-146's airflow pressure system is precisely designed and rigorously calibrated to ensure constant and stable airflow throughout the entire test, fully meeting the standard's requirements for test conditions and ensuring repeatability and reproducibility of results.

Metal-Bath Heating Technology – Safer and Cleaner than Oil Baths
The DFYF-146 employs metal-bath heating technology as an alternative to traditional oil baths. The metal bath requires no heat transfer oil, eliminating the fumes, leakage, and fire risks associated with oil-bath heating. This results in a cleaner and safer laboratory environment. Additionally, metal baths offer faster heating rates, more precise temperature control, and significantly lower maintenance costs than conventional oil baths.

4. Application Scenarios

Scenario 1: Engine Oil Manufacturer – Quality Control and Formulation Optimisation
A major lubricant producer in East China uses the DFYF-146 for evaporation loss testing on every batch of SN/SP grade gasoline engine oils and CK-4 grade diesel engine oils. Following SH/T 0059 at 250°C for 1 hour, the R&D team successfully reduced evaporation loss from an initial 15% to below 10% across different formulations, meeting the stringent evaporation loss requirements of ACEA and API specifications. The split-type structure and automatic timing with alarm enable the quality control department to prepare multiple batches simultaneously, significantly improving daily testing efficiency.

Scenario 2: Third-Party Testing Laboratory – High-Volume Commissioned Testing
A national-level oil testing centre in North China receives over 100 lubricating oil samples per month for evaporation loss testing. The DFYF-146's metal-bath heating technology eliminates the need for oil bath media, avoiding the inconvenience of frequent oil changes and cleaning associated with traditional oil baths, resulting in a cleaner laboratory environment. The uniform heating characteristics of the aluminum alloy evaporation bath and the ±0.5°C temperature accuracy of the microcontroller ensure that every test report meets the standard's repeatability and reproducibility requirements, earning high recognition from clients.

Scenario 3: Transmission Fluid and Industrial Lubricant R&D – High-Temperature Performance Evaluation
A company specialising in automatic transmission fluid (ATF) and industrial gear oil R&D uses the DFYF-146 to evaluate the effect of different base oils and additive combinations on evaporation loss. By comparing evaporation loss data from various formulations at high temperatures, the R&D team precisely identified the base oil combination with optimal oxidation resistance and thermal stability, significantly extending the product's high-temperature service life.

5. Company Strength – Dalian Analytical Instrument Factory

We don't just sell instruments. We provide complete testing solutions with 48-hour technical support response and lifetime remote assistance.

6. Certification & Compliance

Standard Compliance: Fully conforms to SH/T 0059 and ASTM D5800 standards

CE Marking: Available upon request (certificate number can be provided)

Calibration Certificate: Each unit comes with a factory calibration report traceable to national standards

7. FAQ – Frequently Asked Questions

Q1: What is the relationship between SH/T 0059 and ASTM D5800?
A: SH/T 0059 is the Chinese petrochemical industry standard "Determination of Evaporation Loss of Lubricating Oils (Noack Method)", and ASTM D5800 is the ASTM International standard "Standard Test Method for Evaporation Loss of Lubricating Oils by the Noack Method". The two are technically equivalent, both employing the Noack method for determining evaporation loss of lubricating oils. The DFYF-146 fully complies with both standards, making test results mutually recognised worldwide.

Q2: What is the principle of the Noack method?
A: The Noack method involves placing an oil sample in an evaporation crucible and heating it at 250°C (standard test temperature) under a constant airflow (19 ± 2 Pa) for 1 hour. Under high temperature and constant airflow, volatile components in the oil sample evaporate and are carried away by the airflow. The evaporation loss percentage is calculated from the mass difference before and after evaporation. A lower evaporation loss value indicates better high-temperature stability of the oil.

Q3: What are the advantages of a metal bath over a traditional oil bath?
A: Traditional oil baths require heat transfer oil, which poses risks of fumes, leakage, and fire. The oil also needs periodic replacement, resulting in high maintenance costs. The metal bath uses aluminum alloy as the heating medium, requiring no heat transfer oil — offering faster heating rates, more precise temperature control, safer operation, a cleaner environment, and significantly lower long-term maintenance costs than traditional oil baths.

Q4: Why is ±0.5°C temperature accuracy important for Noack testing?
A: Evaporation loss is highly temperature-sensitive — at around 250°C, a 1°C temperature change can cause a 1%–2% variation in evaporation loss values. The ±0.5°C accuracy ensures testing is conducted under strictly constant temperature conditions, with data truly reflecting the oil's high-temperature performance. If temperature fluctuates, results become incomparable across different batches and laboratories.

Q5: What are the practical benefits of the split-type structure?
A: The split-type structure separates the heating system, temperature control system, and airflow pressure system into independent modules, each with a clearly defined function. When a module requires maintenance or calibration, it can be handled individually without disassembling the entire instrument. This reduces maintenance complexity and minimises the risk of complete downtime due to a single point of failure, improving equipment availability and service life.

Q6: Why must the airflow pressure be stabilised at 19 ± 2 Pa?
A: The Noack method is based on the principle of removing volatile components from the oil sample under a constant airflow. If airflow pressure is too high, more volatile materials are carried away (resulting in higher evaporation loss values); if too low, volatile materials are insufficiently removed (resulting in lower evaporation loss values). The stable airflow pressure of 19 ± 2 Pa is a critical condition for ensuring repeatability and reproducibility of test results.

Q7: What is your delivery time?
A: Standard delivery is 20–25 working days after order confirmation. For urgent needs, please contact us to check current stock.

Q8: What is your warranty policy?
A: 12 months from the date of shipment, excluding consumables (evaporation crucibles, etc.). Lifetime technical support is included.

8. Test Method Overview – Building Trust Through Transparency

Per SH/T 0059 / ASTM D5800, here is exactly how the DFYF-146 performs the Noack evaporation loss test:

The entire process — from temperature control to timed alarm — is automated. The metal bath requires no oil medium, making it safer, cleaner, and more efficient.

Summary for Decision Makers

Contact Us

Dalian Analytical Instrument Factory
Carlos Zhang (Overseas Sales Manager)

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