The function of No. 46 anti-wear hydraulic oil purifier

Given the filtering needs of No. 46 anti-wear hydraulic oil, the selection of a suitable filter needs to consider the oil characteristics, pollution control standards and working conditions. The following are key points and recommended solutions:

Key factors for filter selection

- Oil viscosity: The kinematic viscosity of No. 46 hydraulic oil at 40°C is about 46 cSt, and a filter device suitable for medium-viscosity oil needs to be selected.

- Pollution level: The target cleanliness is usually ISO 4406 16/14/11 or higher (such as NAS 1638 level 6), which needs to be determined according to system requirements.

- Flow matching: The filter flow (L/min) should meet the circulation requirements of the system tank volume (recommended 1-2 cycles per hour).

- Filtration accuracy:

- Primary filtration: 10-20μm (remove larger particles and protect pump valves).

- Fine filtration: 1-5μm (to achieve high cleanliness, high-efficiency filter elements with β≥200 are recommended).

- Compatibility: The filter material must be resistant to hydraulic oil (such as glass fiber, stainless steel mesh), and the seal must be fluororubber or nitrile rubber.

Recommended filter types

(1) Portable hydraulic oil filter (offline filtration)

- Applicable scenarios: regular maintenance, small oil tanks, or mobile equipment.

- Model examples:

- Gear pump type: flow rate 20-100 L/min, pressure 0.6MPa, optional 3μm fine filtration.

- Coalescing and dehydration type: also removes moisture (target ≤100ppm), suitable for humid environments.

- Advantages: flexible, low cost, suitable for intermittent filtration.

(2) Online circulation filtration system

- Applicable scenarios: large hydraulic stations, key equipment for continuous operation.

- Configuration suggestions:

- Dual filter: one for use and one for backup, filter element replacement without stopping the machine.

- With heating function: reduce viscosity when starting at low temperature (optional 40-60℃ heater).

(3) Vacuum dehydration oil filter

- Applicable scenarios: Severely water-containing or oxidized oil (preferred when the water content is greater than 500ppm).

- Parameters: Vacuum degree ≤-0.095MPa, can simultaneously remove water to less than 50ppm.

Precautions

- Filter element certification: ｓｅｌｅｃｔ filter elements that meet the ISO 16889 standard to ensure that the β value (filtration ratio) meets the standard.

- Pressure difference monitoring: Install a pressure difference alarm to indicate that the filter element is blocked (ΔP>0.3MPa needs to be replaced).

- Compatibility test: Before the new oil filter is used for the first time, it is necessary to perform a material compatibility test with No. 46 oil.

Maintenance recommendations

- Regular inspection: Take samples every 500 hours to test the particle contamination and water content.

- Filter element replacement: ｒｅｐｌａｃｅ immediately when the pressure difference exceeds the standard or the contamination increases to avoid opening the bypass valve.

For more specific model recommendations, please provide the following information:

- Tank volume or system flow.

- Current contamination level/target level.

- Whether moisture or oxidation is a problem.