The SPX series oil filters mainly operate in the following ways:
1. ** Filtering Impurities ** : When oil containing contaminants enters the SPX series oil filter, the oil will first flow through the filter element. This series of oil filters usually adopt high-precision filter elements, such as glass fiber and other materials. These filter elements have tiny pore diameters and large dirt-holding capacity, which can effectively intercept solid particles, metal powders and other impurities in the oil.
2. ** Sedimentation and Separation of moisture ** : For the possible small amount of moisture in the oil, some SPX series oil filters may have special structures or designs to handle it. For instance, some oil filters are equipped with coalescing layers or special media inside, which can cause the tiny water droplets in the oil to coalesce into larger water droplets. Then, under the effect of gravity, they sink to the bottom of the oil filter, thereby achieving the separation of oil and water.
3. ** Bypass and Safety Protection ** : During the operation of the oil filter, if the filter element is gradually clogged with contaminants, it will lead to an increase in the flow resistance of the oil. To prevent the normal operation of the system from being affected by filter element blockage, the SPX series oil filters are usually equipped with bypass valves [^2^][^3^]. When the pressure difference between the inlet and outlet of the filter element reaches a certain value, the bypass valve will automatically open, allowing some of the unfiltered oil to directly enter the system through the bypass circuit, ensuring that the system can still obtain a certain supply of oil. At the same time, a signal will be sent to prompt the replacement of the filter element [^2^].
4. ** Differential Pressure Indication and Monitoring ** : To facilitate users' understanding of the clogging condition of the filter element, many SPX series oil filters are equipped with differential pressure indicators [^1^]. By observing the changes in the reading on the pressure difference indicator, it is possible to promptly determine whether the filter element needs to be cleaned or replaced, thereby ensuring the normal operation and filtration effect of the oil filter.
In conclusion, the SPX series oil filters work together in multiple ways to effectively remove contaminants from the oil, maintain its cleanliness, extend the service life of various components in the hydraulic system, and enhance the reliability and stability of the system.