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Time：2025-03-25 11:38:44 Reading volume：
The rapid increase in differential pressure of the lubricating oil purifier may be caused by the following reasons, which need to be checked one by one according to the actual situation:
1. Serious oil pollution
- A large amount of particulate matter (metal chips, dust, etc.), water or colloid are mixed in the oil, causing the filter element to be blocked quickly.
- Solution: Perform oil testing (particle count, water content, viscosity, etc.), ｒｅｐｌａｃｅ the lubricating oil and strengthen filtration when necessary.
2. Oil oxidation and deterioration
- Long-term high temperature or oxidation causes oil deterioration, generating colloid or sludge, and increasing the burden on the filter element.
- Solution: Monitor oil temperature and control oxidation conditions; add antioxidants or ｒｅｐｌａｃｅ new oil.
1. Improper filter element selection
- The filtration accuracy is too high (the pore size is too small) or the material is incompatible with the oil (such as poor water resistance).
- Solution: ｓｅｌｅｃｔ a filter element with appropriate accuracy (such as β value ≥ 200) and oil-resistant material according to the system pollution level.
2. Filter element quality defects
- The filter material structure is uneven and the support layer is insufficient, resulting in local collapse or damage.
- Solution: ｒｅｐｌａｃｅ the brand-certified filter element to avoid using inferior substitutes.
3. Filter element overdue use
- The filter element is not replaced according to the cycle, and the impurities accumulate beyond its dirt-holding capacity.
- Solution: ｒｅｐｌａｃｅ it in time according to the pressure difference alarm prompt or the manufacturer's recommended cycle.
1. Abnormal oil temperature
- Oil temperature is too low: viscosity is too high, fluidity is poor, and pressure difference increases; oil temperature is too high: oxidation is accelerated and more impurities are generated.
- Solution: Check the heating/cooling system to ensure that the oil temperature is within the recommended range (such as 40~60℃).
2. Flow fluctuation or overload
- The system flow suddenly increases (such as in the startup phase), exceeding the design flux of the filter element.
- Solution: Optimize system design, and add bypass valve or filter in stages.
3. Influence of bubbles or moisture
- Air or free water is mixed into the oil, forming air blockage or emulsion, which hinders the passage of oil.
- Solution: Check the sealing performance and add vacuum dehydration or exhaust device.
1. Bypass valve failure
- The bypass valve is stuck and cannot be closed, causing unfiltered oil to enter the system directly, aggravating pollution.
- Solution: Repair or ｒｅｐｌａｃｅ the bypass valve to ensure its normal opening and closing.
2. Installation or sealing problems
- The filter housing seal is damaged and the filter element is not installed in place, resulting in oil bypass or leakage.
- Solution: Reinstall the filter element and check the integrity of the seal.
3. The source of system pollution has not been removed
- Residual pollutants in the oil tank and pipeline continue to pollute the new oil.
- Solution: Thoroughly clean the system and perform circulating flushing when necessary.
1. Preliminary inspection: record the pressure differential rise rate and observe the appearance of the filter element (whether it is deformed or damaged).
2. Oil detection: analyze the type of pollutants (particles, moisture, oxidation products).
3. Working condition verification: monitor oil temperature, flow rate and system operation stability.
4. Equipment maintenance review: confirm filter element replacement records, bypass valve status and sealing.
If the problem persists, it is recommended to contact the equipment manufacturer or professional maintenance personnel for further diagnosis to avoid filter element rupture or equipment damage due to excessive pressure differential.
