High-Efficiency Metal Particle Removal Filter (RF Series) – Hydraulic System Protection
What Is A Direct Back Return Line Filter?
A: The RF Series Direct Back Return Line Filter is a high-precision hydraulic filtration component designed for fine filtration of return oil in hydraulic systems. It removes metal particles and rubber contaminants to maintain oil cleanliness, protecting critical components from wear and extending system life.
High Filtration Precision: The filter element is made of glass fiber, with advantages such as high filtration accuracy, large oil passing capacity, small original pressure loss, and large contaminant holding capacity. The filtration accuracy is calibrated with absolute filtration accuracy, and the filtration ratio β3.5, 10, 20 > 100, with filtration efficiency η ≥ 99% meeting ISO standards.
Flexible Installation: This filter can be installed directly on the oil tank cover plate or through a pipe, adapting to diverse system layouts.
Reliable Contamination Control: It is used for fine filtering of the return oil in the hydraulic system, filtering out metal particles generated by the wear of components in the hydraulic system and rubber impurities in seals, etc., to keep the oil flowing back to the tank clean.
Performance and Characteristics
Core Advantages
Diverse Materials & Efficiency Ranges: Outer frame options (galvanized steel plate, plastic); filter materials (ultra-fine polypropylene/glass fiber paper) support medium, sub-high, and high filtration efficiency.
High Air Volume & Cost Efficiency: Compared to ordinary high-efficiency filters, fewer units are needed for the same air volume-reducing costs, installation space, and setup time.
High Dust Capacity & Low Resistance: Partitionless design with thermoplastic rubber separators ensures uniform fold spacing. This maximizes filter material utilization, enabling large dust holding capacity while maintaining small airflow resistance.
Durable Materials: Made of ultra-fine, moisture-proof, fire-resistant glass fiber, ensuring stability in diverse environments.
Function & Application
It is primarily used for:
Hydraulic System Protection: Installed in the return line to protect pumps, valves, and cylinders from abrasive contaminants, reducing component wear and failure.
Oil Cleanliness Maintenance: Ensures consistent oil quality, extending the service life of hydraulic oil and reducing the need for frequent oil changes.
Industrial Hydraulic Equipment: Ideal for machine tools, construction machinery, and factory automation systems where high filtration accuracy and reliability are critical.

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