The Micro-direct Return Oil Filter is a filtration device used in hydraulic systems, primarily tasked with removing metallic powders generated by wear and tear of various components within the system, as well as rubber impurities from seals, ensuring that the oil returning to the tank remains clean for efficient circulation and reuse within the system. Below is a detailed introduction to the Micro-direct Return Oil Filter:
I. Basic Composition
The Micro-direct Return Oil Filter typically consists of two single-cartridge filters, a reversing valve, a bypass valve, a diffuser (some models may also include a signal transmitter), and other components. This design allows for filter element replacement without shutting down the system, enhancing maintenance efficiency and continuity.
II. Working Principle
As the oil flows back to the tank through the return line in the hydraulic system, the Micro-direct Return Oil Filter intercepts and filters out impurities present in the oil. Over time, the filter element gradually becomes clogged, leading to an increase in the differential pressure between the inlet and outlet. When this pressure differential reaches a preset value (e.g., 0.35MPa), the bypass valve automatically opens to protect the filter element and maintain normal system operation. At this point, the user should promptly replace the filter element to ensure filtration effectiveness and system stability.
III. Features and Advantages
Direct Return Design: Facilitates easy replacement of filter elements or oil filling into the tank by simply unscrewing the filter cover (cleaning cover).
- High-Efficiency Filtration: Equipped with novel synthetic fiber filter materials (such as glass fiber), the filter element boasts high filtration accuracy, large oil flow capacity, low initial pressure loss, and high dirt-holding capacity. Its filtration efficiency often exceeds 99%, complying with ISO standards.
- Smooth Oil Return: The diffuser positioned at the bottom of the return oil tank cylinder ensures a smooth flow of the returned oil into the tank, minimizing bubble formation, thereby reducing air re-entry and mitigating disturbances to deposited contaminants.
- System Protection: When the filter element becomes clogged, the bypass valve automatically opens to safeguard both the system and the filter element from damage.
- Wide Range of Applications: Suitable for precise oil return filtration in hydraulic systems across various industries, including chemicals, light industry, electroplating, metallurgy, and more.
IV. Application Examples
The Micro-direct Return Oil Filter finds extensive application in various hydraulic systems, such as rolling mill and continuous casting machine hydraulic systems in the metallurgical industry; product and intermediate separation and recovery in refining and chemical production processes in the petrochemical industry; purification and uniform filtration of polyester melts during the drawing process in the textile industry; and also in thermal and nuclear power generation, machinery processing equipment, and other fields.
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