How to identify the quality of an oil purifier filter?

Identifying the quality of the oil purifier filter element is the key to ensuring the efficient operation of the oil purifier and the cleanliness of the oil. The following are some methods and standards for judging the quality of the filter element:

1. Appearance inspection

1.1 Filter surface

- Uniformity: The surface of the filter material should be uniform, without damage, cracks or obvious defects.

- Flatness: The surface of the filter element should be flat, without obvious bumps or deformation.

1.2 End caps and seals

- End cap material: The end cap should use corrosion-resistant and high-temperature resistant materials (such as stainless steel or high-strength plastic).

- Sealing: Check whether the sealing ring is intact to ensure that there is no risk of oil leakage.

1.3 Structural integrity

- Welding quality: The welding points of the filter element should be firm, without false welding or leaking welding.

- Support structure: The internal support structure should be strong to prevent the filter element from deforming under high pressure.

2. Filtration accuracy

2.1 Nominal accuracy

- Compliance: The nominal filtration accuracy of the filter element should meet the equipment requirements (such as 1 micron, 5 microns, etc.).

- Consistency: The filtration accuracy of the filter elements of the same batch should be consistent.

2.2 Actual test

- Particle count: Use a particle counter to detect the filtered oil and verify the actual filtration accuracy of the filter element.

- Filtration efficiency: Evaluate the filtration performance of the filter element through filtration efficiency tests (such as β value tests).

3. Flow and differential pressure

3.1 Flow test

- Flow matching: The flow of the filter element should meet the equipment requirements to ensure filtration efficiency.

- Flow attenuation: After long-term use, the flow should not ｄｒｏｐ significantly.

3.2 Differential pressure test

- Initial differential pressure: The initial differential pressure of a new filter element should be within a reasonable range.

- Differential pressure growth: As pollutants accumulate, the differential pressure should increase gradually, but not too fast.

4. Materials and craftsmanship

4.1 Filter material quality

- Corrosion resistance: The filter material should be resistant to chemicals in the oil and not easily corroded.

- High-temperature resistance: The filter material should be able to work stably in a high-temperature environment.

4.2 Process level

- Folding process: The folds of the folded filter element should be uniform, without damage or adhesion.

- Bonding quality: The bonding between the filter material and the end cap should be firm without debonding.

5. Service life

5.1 Pollutant holding capacity

- Pollutant holding capacity: High-quality filter elements should have a higher pollutant holding capacity and extend the replacement cycle.

- Service life: Under the same working conditions, the service life of high-quality filter elements should be significantly longer than that of low-quality filter elements.

5.2 Replacement frequency

- Reasonable replacement: According to the usage, the replacement frequency of the filter element should be within a reasonable range. Too frequent replacement may indicate that the filter element is of poor quality.

6. Brand and certification

6.1 Brand Reputation

- Well-known brand: Choose a brand with a good reputation to ensure the quality of the filter element.

- User evaluation: Refer to the evaluation and feedback of other users.

6.2 Certification and Standards

- Industry certification: The filter element should comply with relevant industry standards (such as ISO 16889, ISO 4572, etc.).

- Quality certification: Choose products that have passed ISO 9001 and other quality certifications.

7. Actual use effect

7.1 Oil cleanliness

- Cleanliness test: Use oil cleanliness detection instruments (such as particle counters) to detect the filtered oil to ensure that it meets the equipment requirements.

- Oil state: Observe the color and transparency of the oil to judge the filtering effect.

7.2 Equipment operation status

- Equipment performance: The operation status of the equipment should be significantly improved after filtration, such as reduced noise and stable temperature.

- Failure rate: High-quality filter elements should be able to effectively reduce the equipment failure rate.

Summary

To identify the quality of the oil purifier filter element, a comprehensive evaluation is required from multiple aspects, including appearance, filtration accuracy, flow and pressure difference, material and process, service life, brand and certification, and actual use effect. Through careful inspection and testing, high-quality filter elements can be selected to ensure the efficient operation of the oil purifier and the cleanliness of the oil.