DFYF-954 Lubricant Filterability Tester (Touch Screen, 50~200KPa Adjustable, Dry/Wet Dual Modes, Compliant with SH/T 0805-2008)

DFYF-954 Lubricant Filterability Tester (Touch Screen, 50~200KPa Adjustable, Dry/Wet Dual Modes, Compliant with SH/T 0805-2008)

1. Customer Pain Point + Solution

Pain Point:

For the reliable operation of hydraulic systems, engines, and other critical machinery, the cleanliness and filterability of lubricating oils are key factors determining equipment reliability and service life. During storage, transportation, and use, lubricating oils inevitably become contaminated with particulate matter, water, and oxidation by-products — these contaminants circulate with the oil into precision components. If filterability is poor, contaminants accelerate filter clogging, leading to increased system pressure and insufficient flow. More critically, hard particles that pass through the filter directly wear valve spools, pump bodies, and bearings, causing premature equipment failure or even sudden breakdowns. However, traditional filterability assessment methods rely on empirical judgement, lack unified quantitative standards, and test results from different laboratories are difficult to compare. How can you accurately and quantitatively evaluate the filterability of lubricating oils in the laboratory?

Our Solution:

The DFYF-954 Lubricant Filterability Tester is strictly designed and manufactured in accordance with SH/T 0805-2008 Determination of Filterability of Lubricating Oils. It is used to evaluate the filtration performance of mineraloilbased lubricants, particularly hydraulic oils used in hydraulic systems. The instrument passes an oil sample through a standard filter membrane (effective filtration area 1130 ± 60 mm²) under constant pressure. Through a touch screen, it records filtration time and flow rate, and automatically calculates key parameters including stage filterability, permissible deviation *d*, repeatability *r*, and reproducibility R. The maximum air supply pressure is 700KPa, with an adjustable pressure range of 50KPa ~ 200KPa and regulation error ≤ 5KPa. It supports both dry and wet test methods in one unit. The filter cell volume is 350mL with a pressure rating above 300KPa.

Customer Value:

You no longer need to worry about frequent filter clogging, accelerated equipment wear, or the inability to quantify oil quality. The DFYF-954 provides a complete filterability testing solution featuring standard compliance (SH/T 0805-2008), wide adjustable pressure (50~200KPa), smart touch-screen operation, dual test modes, and automatic calculation of key indicators — controlling oil quality at the source and safeguarding long-term equipment reliability.

2. Technical Parameters Table

3. Product Highlights

Compliant with SH/T 0805-2008 – Authoritative and Reliable Data
The DFYF-954 is strictly designed and manufactured in accordance with SH/T 0805-2008 Determination of Filterability of Lubricating Oils. The standard was drafted by the Petrochemical Research Institute of SINOPEC, under the jurisdiction of SINOPEC and the National Development and Reform Commission. It is a modified adoption of ISO 13357-1:2002 and ISO 13357-2:2005, aligning with international standards. It applies to mineraloilbased lubricants, especially hydraulic oils used in hydraulic systems. Test results carry industry credibility and can serve as a basis for quality arbitration.

Wide Adjustable Pressure Range – Simulates Real Operating Conditions
Maximum air supply pressure: 700KPa; adjustable pressure range: 50KPa ~ 200KPa; regulation error ≤ 5KPa. Different hydraulic systems operate at different pressures — from lowpressure lubrication systems to highpressure precision hydraulic systems — the DFYF-954 can simulate the corresponding filtration environment. The pressure regulation accuracy of ±5KPa, together with a precision pressurereducing valve and pressure sensor, effectively prevents filtration rate deviations caused by pressure fluctuations, ensuring data repeatability.

HighPrecision Filter Assembly – Ensures Test Accuracy
Filter cell volume: 350mL; effective filtration area: 1130 ± 60 mm² — fully compliant with SH/T 0805 requirements. The filter cell has a pressure rating above 300KPa and uses a positivepressure filtration design, ensuring safe and reliable operation. The membrane assembly is easy to disassemble and replace, facilitating routine maintenance and cleaning for longterm continuous operation.

Dual Test Modes – Versatile Operation
Supports both dry and wet test methods. The dry method is used to evaluate filterability under waterfree conditions, while the wet method simulates performance in the presence of water. The two modes can be flexibly selected according to actual needs, accommodating different oil types and analytical objectives in a single instrument.

Smart Touch-Screen System – Efficient and User-Friendly
A touch screen interface allows intuitive parameter setting and operation. The multisegment timing function automatically records the entire experiment process. Automatic calculation outputs key indicators — stage filterability, permissible deviation *d*, repeatability *r*, and reproducibility R — eliminating manual calculation, reducing human error, and improving testing efficiency and data reliability.

Dedicated Graduated Cylinder – Clear Volume Reading
Includes a specialised filtrate collection cylinder with 10mL and 300mL graduations, facilitating easy observation and recording of filtrate volume. Clear markings and accurate readings meet the precision requirements of the standard method.

4. Application Scenarios

Scenario 1: Hydraulic Oil Manufacturer – Quality Control
A major hydraulic oil producer in East China uses the DFYF-954 for filterability testing on every batch of HM hydraulic oils. Following SH/T 0805-2008 at a constant pressure of 100KPa, the oil sample is passed through a 0.8μm standard filter membrane, and the time required for different volumes of filtrate to pass is recorded. The touch screen automatically records multisegment timing data and calculates stage filterability indicators. The hydraulic oils consistently meet filterability requirements, significantly reducing customer complaints related to system failures caused by filter clogging.

Scenario 2: Construction Machinery Oil Supplier – InService Oil Condition Monitoring
A construction machinery rental company in North China uses the DFYF-954 for regular filterability monitoring of hydraulic oil in inservice hydraulic excavators. As oil service time increases, oxidation byproducts and wear particles gradually accumulate, causing filterability to decline. Through the dry/wet dual-mode testing, the maintenance team can separately evaluate oil filterability under waterfree and watercontaining conditions, detect oil degradation trends in time, and develop scientific oil change and filter replacement schedules.

Scenario 3: Third-Party Testing Laboratory – Commissioned Testing Services
A nationallevel oil testing centre in South China receives large numbers of hydraulic oil and gear oil samples for filterability testing each month. The DFYF-954's wide adjustable pressure range (50~200KPa) allows flexible test pressure settings according to different oils and client requirements. The touchscreen operation and automatic calculation functions enable efficient batch testing. The automatically output repeatability *r* and reproducibility R data provide strong data support for test reports, earning high recognition from CMA assessors.

Scenario 4: Lubricant R&D Laboratory – Formulation Screening and Optimisation
A lubricant R&D institution uses the DFYF-954 to evaluate the effect of different additive combinations on filterability during the development of new hydraulic oil formulations. By comparing filterability indicators of different formulations under both dry and wet modes, the R&D team precisely identified additive solutions that exhibit excellent filterability under both conditions. The automatically calculated stage filterability data provide a quantitative basis for formulation optimisation, accelerating the product development process.

5. Company Strength – Dalian Analytical Instrument Factory

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

6. Certification & Compliance

Standard Compliance: Fully conforms to SH/T 0805-2008 (modified adoption of ISO 13357-1:2002 / ISO 13357-2:2005)

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 oils does SH/T 0805-2008 apply to?
A: SH/T 0805-2008 Determination of Filterability of Lubricating Oils applies to mineraloilbased lubricants, particularly hydraulic oils used in hydraulic systems. It is applicable to oils with a viscosity grade not exceeding VG 100 according to the GB/T 3141 viscosity classification. It does not apply to other base fluids (such as fireresistant fluids), nor to hydraulic oils containing insoluble or partially soluble additives or special macromolecular substances.

Q2: What is the difference between filterability testing and cleanliness testing?
A: Cleanliness testing (e.g., ISO 4406, NAS 1638) evaluates the content and size distribution of solid particulate contaminants in the oil, reflecting the current contamination level. Filterability testing (SH/T 0805-2008) evaluates the ability of the oil to pass through a standard filter membrane under constant pressure, reflecting the tendency of contaminants in the oil to clog filters. The two complement each other — cleanliness testing tells you "how much dirt is present," while filterability testing tells you "whether that dirt will clog the filter."

Q3: What are the respective applications of the dry and wet test methods?
A: The dry method (corresponding to ISO 13357-2) evaluates filterability under waterfree conditions, suitable for hydraulic systems with strict moisture control. The wet method (corresponding to ISO 13357-1) evaluates filterability under watercontaining conditions, simulating actual service conditions where oil may be contaminated with water. Studies show that oils with good filterability under wet conditions do not necessarily perform equally well under dry conditions — the two modes complement each other to provide a comprehensive evaluation of oil filterability.

Q4: What is the practical significance of the 50~200KPa adjustable pressure range?
A: Different hydraulic systems operate at different pressures. 50KPa simulates lowpressure lubrication systems, 100KPa simulates conventional hydraulic systems, and 200KPa simulates highpressure precision hydraulic systems. The wide adjustable pressure range of the DFYF-954 enables laboratories to select the most appropriate test pressure according to the oil's actual application, making test results more engineeringrelevant.

Q5: What indicators does the touchscreen automatic calculation function output?
A: The system automatically calculates and outputs stage filterability (the filtration time ratio for different filtrate volumes), permissible deviation *d*, repeatability *r* (precision within the same laboratory and operator), and reproducibility R (precision between different laboratories). These indicators are key parameters for evaluating oil filterability and laboratory testing capability.

Q6: How is the filter cell membrane assembly maintained?
A: The filter cell membrane assembly features a removable design. After each test, the filter membrane can be replaced, and the filter cell body can be cleaned with solvent for reuse. The easytodisassemble membrane components facilitate routine maintenance, ensuring that every test is conducted under clean filtration conditions.

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 (standard filter membranes, etc.). Lifetime technical support is included.

8. Test Method Overview – Building Trust Through Transparency

Per SH/T 0805-2008, here is the typical procedure for lubricant filterability testing using the DFYF-954:

Dry/wet dual modes for flexible switching; 50~200KPa wide adjustable pressure; touchscreen multisegment timing + automatic calculation — the DFYF-954 provides a complete filterability testing solution from sample to report.

Summary for Decision Makers

Contact Us

Dalian Analytical Instrument Factory
Carlos Zhang (Overseas Sales Manager)

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