I. Features
- Excellent filtration characteristics, uniformly exhibiting surface filtration characteristics across the entire range of particle size distributions.
- Good corrosion resistance, temperature resistance, impact resistance, and wear resistance.
- Evenly distributed air outlet holes on the coal mine filter element, ensuring precise filtration accuracy.
- High flow rate per unit area of the coal mine filter element.
- The coal mine filter element is suitable for both low and high-temperature environments; it can be reused after cleaning, eliminating the need for replacement.
II. Classification and Installation Positions
Based on installation locations and functions, coal mine filter elements are primarily classified into the following categories:
- Suction Line Oil Filter: Installed on the inlet pipeline from the oil tank to the hydraulic pump, protecting the pump from large particle impurities.
- Pressure Line Oil Filter: Located on the pressure oil line, safeguarding downstream components and serving as the primary oil filter to ensure system oil cleanliness.
- Return Line Oil Filter: Placed on the return oil line, intercepting abrasive particles and other contaminants generated by various components during operation, preventing them from reentering the oil tank and being sucked in by the hydraulic pump.
- Circulating Filtration Filter: Used for continuously filtering oil in hydraulic systems to maintain long-term oil cleanliness.
- Air Filter: Prevents dust, impurities, and other contaminants in the air from entering the hydraulic system.
III. Materials and Structures
The materials and structures of coal mine filter elements are typically designed according to specific requirements, but generally exhibit the following characteristics:
Materials: Commonly used materials include stainless steel, aluminum, and plastics. Stainless steel is widely applied due to its corrosion resistance and high strength. The internal filtration layers often employ materials such as glass fiber filter paper, synthetic fiber filter paper, and sintered felt, which exhibit excellent filtration performance and durability.
Structures: Typically comprise end caps, skeletons, and filtration layers. The end caps connect and secure the filter to the equipment; the skeleton supports and protects the filtration layer; and the filtration layer, composed of multiple layers of filtering material, is the key component for removing impurities. Additionally, some high-end coal mine filters utilize special processes and technologies to enhance filtration efficiency and durability.
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