The primary purpose of a hydraulic oil filter is to remove contaminants from the hydraulic fluid, ensuring smooth and efficient operation of the system. Common types of filter elements include hydraulic oil filters, Hedeck filters, Pall filters, and dust filters. In this article, we will explore how a jade hydraulic oil filter works and why it plays a crucial role in maintaining system performance.
The main function of a jade hydraulic oil filter is to clean the hydraulic fluid by capturing various impurities that can enter the system. These impurities may come from multiple sources. For instance, mechanical debris such as rust, casting sand, welding slag, metal shavings, paint particles, and cotton threads can remain in the system after maintenance. Additionally, external contaminants like dust can enter through the fuel filler cap or the dust seal. During operation, impurities can also be generated, such as rubber particles from seals, fine metal powders from moving parts, and colloidal substances like asphaltene and carbon residue.
When these contaminants mix with the hydraulic oil, they circulate throughout the system and cause damage. They can clog small gaps and orifices between moving components, leading to blockages, reduced efficiency, increased internal leakage, and higher operating temperatures. Over time, the oil’s protective film can be compromised, resulting in wear on surfaces, accelerated chemical degradation, and overall oil deterioration. According to industry data, over 75% of hydraulic system failures are caused by contamination in the oil. This highlights the importance of keeping the hydraulic fluid clean and preventing contamination.
Jade filter elements are available in four main types: paper, mesh, wire gap, and chemical fiber. Among these, chemical fiber filters offer superior filtration performance, with higher precision compared to paper filters. However, both paper and chemical fiber filters are difficult to clean once clogged, so they must be replaced when necessary. Some systems, like the return oil filter, are equipped with a differential pressure indicator. When the pressure difference between the inlet and outlet reaches 0.35 MPa due to clogging, the device sends a signal, indicating that the filter needs cleaning or replacement.
Modern jade filters use advanced chemical fiber materials that provide high filtration accuracy, large flow capacity, minimal initial pressure drop, and excellent dirt-holding capacity. These filters are calibrated using absolute filtration standards, with filtration ratios of P3, P5, P10, P20 > 100 and an efficiency of at least 99%, meeting ISO specifications. This ensures reliable performance and long service life for hydraulic systems.
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