1. Understand the working conditions of hydraulic systems
(1) Select the appropriate filter element based on the working pressure of the hydraulic system, ensuring that the filter element can withstand the working pressure of the system and prevent damage due to excessive pressure difference.
(2) Working temperature: The working temperature range of the filter element should match the working temperature of the hydraulic system. Usually, the working temperature range of the filter element should be between -10 ℃ and 100 ℃.
(3) Select the size and type of filter element according to the flow requirements of the system to ensure that the filter element can meet the flow requirements of the system.
(4) Different viscosities of media have varying effects on the filtration efficiency of filter cartridges. Choosing a filter element that is suitable for the viscosity of the medium can improve filtration efficiency.
2. Determine the accuracy level of the filter element
(1) The precision level of the filter element determines its ability to filter impurities. The commonly used accuracy levels include 10 μ m, 25 μ m, and 40 μ m. The selection of the correct accuracy level should be determined based on the requirements and working conditions of the hydraulic system.
(2) The target cleanliness level of the hydraulic system indirectly determines the service life of the filter element. If the cleanliness level is set too high, the filtration accuracy of the filter element will be high, but the frequency of replacing the filter element will also increase. Therefore, it is necessary to balance the service life and replacement cost of the filter element while ensuring the cleanliness of the system.
3. Consider the strength and smoothness of the filter element
(1) Strength: A qualified hydraulic filter element should be able to withstand external installation forces, pressure differentials, and alternating pressure loads.
(2) Smoothness: The filter element has requirements for the smoothness of oil flow to ensure that impurities can be intercepted smoothly without affecting the normal operation of the system.
4. Requirements for high temperature and cold resistance
Hydraulic filter cartridges need to have high temperature and cold resistance to ensure normal use in high-altitude and cold regions.
5. Reference filter lifespan
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