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Filter element of high precision oil purifier
Dnme ultra precision filter element 1. The filter element is made of special long fiber, deep filtration structure and high-density high-pressure treatment. 2. High performance filter element with deep crepe structure. 3. Strong adsorption and hydrophilicity, high filtration accuracy, long service cycle and convenient replacement. 4. It is suitable for filtering hydraulic oil, lubricating oil, turbine oil, insulating oil and other oil products. |
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Water glycol filter element
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Dnwg ultra precision filter element WG ultra precision filter element is the same as me ultra precision filter element in terms of production process. The difference in performance is that WG ultra precision filter element only removes impurities and does not remove water. It belongs to the special filter element for fire-resistant hydraulic fluid such as water glycol. |
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By observing the overall and surface shape of the filter element and the types of pollutants on the surface, the damaged parts of the machine and the state of oil can be predicted, so as to prevent mechanical accidents. Please refer to the following table for mechanical protection.
Change of filter element |
Take countermeasures |
Overall shape |
Surface shape |
1. Dust, oil residue and other pollutants accumulate on the surface | When dust, oil residue and a small amount of metal powder can be seen on the filter element, it can be said that the machine and oil are in normal state. If the filter element turns black or yellow obviously, please check the total acid value. |
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2. A large amount of metal powder is deposited on the surface | When there is a large amount of metal powder on the filter element, it is caused by the wear of components with the same metal. Please check it as soon as possible. |
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3. Cracks appear on the surface of filter element (very soft with fingers) | It can be considered that a large amount of water is mixed in the oil. Please check the water content and find out the cause. Please repair it before use. |
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4. Cracks appear on the surface of the filter element (very hard with fingers) | It indicates that the filter element is saturated. Please replace the filter element as soon as possible. |
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5. filter element sinking | The reason is that the pressure in the oil purifier is too high. Please check the connecting pipe and pressure on the outlet side. When the filter element is soft, it is mixed with excessive water. |
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6. The filter element becomes smaller as a whole | As the captured oil contamination exceeds the allowable amount, the internal pressure of the oil purifier increases, resulting in the deformation of the filter element. Please replace the filter element as soon as possible |
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NAS grade is a commonly used standard for measuring the degree of pressure oil pollution. The grade of oil pollution can be determined by comparing the multiple of pollution with the following chart.
Contaminated particle |
NAS Grade(Nos,in100ml) |
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00level |
0level |
1level |
2level |
3level |
4level |
5level |
6level |
7level |
8level |
9level |
10level |
11level |
12level |
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5-15μ |
125 |
250 |
500 |
1000 |
2000 |
4000 |
8000 |
16000 |
32000 |
64000 |
128000 |
256000 |
512000 |
1024000 |
15-25μ |
22 |
44 |
89 |
178 |
356 |
712 |
1425 |
2850 |
5700 |
11400 |
22800 |
45600 |
91000 |
182400 |
25-50μ |
4 |
8 |
16 |
32 |
63 |
126 |
253 |
506 |
1012 |
2025 |
4050 |
8100 |
16200 |
32400 |
50-100μ |
1 |
2 |
3 |
6 |
11 |
22 |
45 |
90 |
180 |
360 |
720 |
1440 |
2880 |
5760 |
100μ |
0 |
0 |
1 |
1 |
2 |
4 |
8 |
16 |
32 |
64 |
128 |
256 |
512 |
1024 |
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Filtered grade |
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New oil grade |
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