In the high-pressure oil station system of the coal mill, the cleanliness of the hydraulic oil is one of the key factors to ensure the normal operation of the system. Therefore, it is an important part of equipment maintenance and management to reasonably set the filter level of the hydraulic filter element to achieve the best filtering effect and economic benefits. This article will discuss how to set up efficient filter element filtration levels in the high-pressure oil station of the coal mill, taking the FX-190X10 H filter element as an example.

Graded filtration is the core strategy for optimizing the cleanliness of the hydraulic system. It uses a multi-stage filter element combination based on the difference in the size of pollutants to remove impurities in the oil step by step. This strategy is usually divided into three levels: coarse filtration, medium filtration and fine filtration:

Coarse filter layer: As the first line of defense, the coarse filter layer filter element (such as mesh or large-aperture paper core) is responsible for intercepting large particle pollutants such as iron filings, sand and gravel, etc., to prevent them from entering the deep part of the system and causing damage. The design focus of this level is high capacity and low resistance to ensure continuous operation even under heavy load pollution.

Medium filter layer: On this basis, the medium filter layer further refines the filtration, mainly targeting medium-sized particles. This level can use finer fiber materials or depth filter materials to effectively reduce the amount of impurities entering the fine filter layer and reduce the subsequent filtration pressure.

Fine filter layer: FX-190X10 H filter element usually plays the role of fine filtration, using its fine filtration ability to remove tiny particles in the oil to ensure that the oil quality meets the requirements of precision components inside the hydraulic system. This not only protects expensive hydraulic components, but also extends the service life of the entire system.

In precision filter elements such as FX-190X10 H, the design of the bypass valve is crucial. When the filter element is close to saturation and the pressure difference increases to a certain threshold, the bypass valve automatically opens to ensure uninterrupted oil flow and sends a signal to replace the filter element to avoid the risk of system downtime caused by filter element blockage.

Maintenance and monitoring are the key to ensuring the long-term and efficient operation of the filtration system. Regular oil sampling and analysis, assessment of the degree of contamination, and adjustment of the filtration level and maintenance plan accordingly are important components of preventive maintenance. When selecting a filter element, it is necessary to comprehensively consider its performance, replacement cycle and cost to find the most cost-effective solution. While adding filtration levels can significantly improve oil cleanliness, over-investing in advanced filter media may lead to increased maintenance costs, so it is important to find the balance that best suits the actual needs of the system.
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