RFB Series Low-Maintenance Hydraulic Filter Self-Sealing for Tank Mounting
What Is A Direct Back Self Sealing Return Filter?
A: The RFB Series Direct Back Self Sealing Return Filter is a high-performance hydraulic filtration device designed for the fine filtration of return oil in hydraulic systems. It integrates magnetic particle capture, self-sealing maintenance, and system protection features to ensure clean oil and reliable operation of hydraulic components.

Performance and Characteristics
Core Advantages
Dual Filtration Efficiency: Combines mechanical filtration with a built-in permanent magnet to capture ferrous particles ≥1μm, effectively removing metal wear debris and rubber contaminants from return oil.
Self-Sealing Maintenance: When replacing the filter element, the check valve prevents oil from flowing out of the tank, eliminating the need to drain the system and reducing maintenance downtime.
Integrated System Protection: Equipped with a bypass valve that automatically opens at 0.4MPa pressure differential, protecting the filter and system during cold start-ups or when the element is clogged.
Smooth Oil Return: A liquid flow diffuser ensures stable, bubble-free oil return, reducing air re-entry and preventing recontamination of the oil tank.
Condition Monitoring: Features a visual sight gauge and electrical signal transmission (triggered at 0.35MPa) to monitor filter clogging, with an overflow pipe and pollution accumulation cup to collect contaminants.
Flexible Installation: Can be mounted on the top, side, or bottom of the oil tank, with a flange connection for easy installation and filter element replacement.
Function & Application
It is primarily used for:
Hydraulic System Protection: Filtering return oil to remove metal particles and rubber contaminants, protecting pumps, valves, and other critical components from wear and damage.
Oil Cleanliness Maintenance: Ensuring oil returning to the tank remains clean, extending oil service life and reducing system downtime.
Industrial Hydraulic Equipment: Ideal for machine tools, construction machinery, and other hydraulic systems requiring reliable return oil filtration.

Customized product display
OEM, OEM Production services. Independent R&D team, one-stop solution for cleanroom projects.

Related Products
If you also have business in hospitals or clean rooms, you can take a look at these products.
Primary Efficiency Universal Plate Air Filter (G1-G4 Low Resistance & High Efficiency Type) PPS/PTFE High-Temperature Resistant Chemical Fiber Needle-Punched Filter Material Precision Direct Back Hydraulic Return Line Oil Filter
