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Quality automotive filter should have the technical indicators
Quality oil filter to have the technical indicators,
1, the first is: filter oil filter of filter paper is higher than the air cleaner, mainly because the oil temperature changes from 0 to 300 degrees ranging in temperature change dramatically, the oil concentration change, which will affect the flow of filtered oil. High quality oil filter filter paper can be under severe temperature changes, fully filter impurities, ensure adequate flow of oil filter.
2, rubber sealing ring: high quality oil filter sealing ring is made of special rubber, resistant to temperature, salt, anti aging, ensure that 100% does not leak oil.
3, return valve: only the quality of oil filter. When the engine is turned off, it can prevent the engine oil filter from becoming dry; when the engine is re ignited, it immediately generates pressure to supply the engine oil to the engine.
4, overflow valve: only the quality of oil filter in the. When the external temperature is reduced to a certain value or when the oil filter exceeds the normal use period, the overflow valve will be opened under the special pressure, so that the filter oil directly into the engine. In spite of this, the impurities in the oil will enter the engine, but it is much smaller than the loss of oil in the engine. So the relief valve is the key to protect the engine in an emergency.