hydraulic filtration tanks, as an indispensable part of the hydraulic system, not only keep the fluid in the tank clean, but also prevent dirt particles from the outside, prolong the working cycle and service life of the fluid and components, thus ensuring the normal operation of the hydraulic system. It utilizes a porous medium to remove contaminants from the fluid (liquid or gas), a process that seems simple, but contains a complex filtration mechanism. As the fluid flows through the filter, contaminants are blocked by the screen and clean fluid is discharged smoothly. The removable cartridge design greatly facilitates cleaning and replacement during this process, reducing maintenance costs.
1.Filtration principle
Surface type filtration: This type of filter intercepts large particles of impurities in the fluid directly with the small uniform holes on the surface of the filter element. Line gap type, net type and sheet type are the three main forms of surface-type filters, which are widely used in a variety of hydraulic systems to provide preliminary filtration of the fluid.
Depth type filtration: Different from surface type filtration, the depth type filter element consists of multi-layer porous material, with complex and twisted internal channels. When the fluid flows through the cartridge, large particles are blocked on the outer surface of the cartridge, while small particles are adsorbed in the internal channel of the cartridge due to surface tension. This type of filtration not only has a high filtration capacity, but also effectively extends the service life of the cartridge. Filter elements are available in a variety of materials, including paper core, sintered metal, felt and fiber, providing a rich choice for hydraulic systems with different needs.
Adsorption type filtration: Magnetic filter is the representative of adsorption type filter, which utilizes the magnetic field force to attract the magnetic particles such as iron chips and iron powder in the oil. Magnetic filter cartridges are made of permanent magnets and can efficiently remove magnetic impurities from the oil fluid. However, its scope of application is limited and it is mainly suitable for hydraulic systems containing magnetic particles. In order to improve the filtration effect, the magnetic filter is often used in combination with other forms of filter elements to form a composite filter.
2. Precautions during use
When using hydraulic filtration tanks, a number of precautions must be strictly adhered to in order to ensure optimum performance. Firstly, it is vital to prevent the filters from being fed with oil in the reverse direction. Incorrect connections can lead to oil contamination or equipment damage, so reliable measures must be put in place to ensure that filters are installed correctly.
Secondly, the setup of differential pressure monitoring and alarm systems is equally important. When the cartridge is contaminated, the differential pressure flowing through the filter may increase and even trigger the bypass valve to open. To avoid this, the filter should be equipped with a visual or electrical alarm device to provide accurate instructions for cartridge replacement in a timely manner.
Finally, the replacement and maintenance of the filter element is also a link that cannot be ignored. Filter cartridges, as wearing parts, need to be replaced periodically to maintain the filtration effect. In the design, the convenience of maintenance and replacement should be considered, leaving enough space for replacement. Although the stainless steel cartridge can be reused, the cleanliness after cleaning is difficult to ensure, therefore, it is recommended to use disposable paper cartridges. At the same time, regular cleaning and inspection of the filter is also the key to maintaining its performance.
Reasonable selection and use of filters in the hydraulic system is critical to maintaining fluid cleanliness and stable system operation. Understanding the relevant knowledge, we can better play the role of the filter, extend the service life of the hydraulic system, and improve the reliability and safety of the equipment. If you want to know more about hydraulic filtration tanks, welcome to visit Hanjiu's official website to browse the information, and if you encounter any problems during the browsing process, please contact us, and our staff will reply promptly.
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