Hydraulic oil filter element is a component used in filters for filtration purposes. It can filter lubricating oil and industrial liquids, and is typically installed at the inlet end of the hydraulic system's filtration system. Its function is to remove metal particles and contaminating impurities from the liquid medium, thereby safeguarding the normal operation of machinery and equipment. When hydraulic oil passes through the filter element, impurities and particles larger than its pore size are retained on the surface of the filter element, while particles smaller than the pore size pass through the filter element and enter the system.
I.Fuction
Filtering Impurities: Removes metallic particles, contaminants, and other impurities from the fluid medium, maintaining the cleanliness of the oil.
Protecting Equipment: Prevents impurities from entering hydraulic components, reducing wear and tear on components, and safeguarding critical parts such as pumps and valves.
Enhancing System Efficiency: Maintains stable oil performance, improving the operational efficiency and reliability of the hydraulic system.
II.Classification and Installation Locations
Hydraulic system oil filters are primarily classified based on their installation locations and functions, as follows:
Suction Line Oil Filter: Installed on the inlet pipeline from the oil tank to the hydraulic pump, protecting the pump from damage caused by large particulate impurities. Its filtration accuracy typically ranges from 100 to 180μm, depending on the pump's self-priming capability.
Pressure Line Oil Filter: Mounted on the pressure oil line, safeguarding downstream components and serving as the primary filter to ensure the cleanliness of the system's oil. It boasts a higher filtration accuracy, usually between 5 and 10μm, and endures significant pressure and vibration.
Return Line Oil Filter: Positioned on the return oil line, it intercepts abrasive particles and other contaminants generated by various components during operation, preventing them from recirculating into the oil tank and being re-ingested by the hydraulic pump. Its filtration accuracy is determined specifically by the required oil cleanliness level.
Circulating Filtration Filter: Utilized for continuously filtering the oil in the hydraulic system to maintain its long-term cleanliness.
Air Filter: Prevents dust, impurities, and other contaminants in the air from entering the hydraulic system.
III.Materials and Structure
Hydraulic system oil filters are primarily constructed from materials such as stainless steel woven mesh, sintered mesh, and iron woven mesh. The filtration materials include glass fiber filter paper, synthetic fiber filter paper, and wood pulp filter paper. The filter element's structure consists of single or multiple layers of metal mesh combined with filter media, with the specific number of layers and mesh size determined by various operating conditions and applications.
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