RFB series direct return self sealing magnetic oil return filter

The RFB series direct return self sealing magnetic return oil filter is an integrated self sealing purification device developed for the return oil pipeline of medium and low pressure hydraulic systems. It adopts a direct return layout with the top exposed and the cylinder fully immersed in the oil tank. The oil flows directly into the filter from the system return oil pipeline, and after purification, it returns directly to the oil tank without the need for additional external transition pipelines, greatly simplifying the oil circuit layout logic of the hydraulic station. At the same time, relying on the built-in self sealing structure, the oil can be automatically intercepted during maintenance, with no risk of overflow throughout the process, and is suitable for the installation space and usage requirements of the return oil end of most standard hydraulic systems.

The RFB series direct return self sealing magnetic oil return filter is equipped with a ring-shaped strong magnetic component, which can adsorb ferromagnetic metal particles flowing through the oil in all directions. Paired with foldable filter elements of different filtration accuracies, it forms a dual purification path of "strong magnetic coarse interception+precision fine filtration", effectively improving the overall pollutant holding capacity; A self sealing valve group is installed at the top. When the filter cartridge housing is rotated to replace the filter element, the self sealing valve at the inlet will automatically close, blocking the flow of oil from the upstream pipeline without the need to drain the pipeline oil in advance; Equipped with a built-in bypass valve, the opening pressure is set to 0.3MPa. When the filter element is blocked, causing the pressure difference between the front and rear to exceed the limit, or when the oil viscosity is too high in a low-temperature environment, the bypass valve will automatically open to prevent the filter element from being broken by high pressure and causing secondary pollution; Equipped with a 0.3MPa differential pressure transmitter as standard, it can issue a warning in a timely manner when the filter element reaches the rated blockage capacity, reminding operation and maintenance personnel to replace the filter element; A simple exhaust valve is installed at the top of the filter head, which can quickly discharge the accumulated air inside during the initial operation of the system, avoiding cavitation and cavitation.

The RFB series direct return self sealing magnetic return oil filter is widely applicable to various industrial low-pressure hydraulic systems for oil purification scenarios. It can be used in general machine tool hydraulic stations, light industry automation equipment hydraulic circuits, engineering machinery auxiliary hydraulic systems, plastic molding oil circuits, mining small lubrication systems, agricultural machinery hydraulic power units and other working conditions. It is particularly suitable for operating environments that require frequent maintenance of filter elements and require on-site cleanliness. It can effectively reduce the wear rate of various hydraulic valves, plunger pumps, and actuator cylinders, and extend the service life of hydraulic oil and core components.

Compared to conventional return oil filters, the direct return flow channel design of the RFB series direct return self sealing magnetic return oil filter significantly shortens the residence path of oil in the filter, reduces unnecessary pressure loss, and improves system operating energy efficiency; The self sealing structure completely solves the problem of oil splashing and leakage during core replacement, and a single person can quickly complete maintenance operations without the need for additional oil receiving tools; Compared to single point magnetic blocks, the circular fully wrapped strong magnetic layout increases the adsorption efficiency of ferromagnetic particles by more than 40%, effectively extending the service life of precision filter cartridges and reducing long-term usage costs; The overall design adopts modular standard interface, which can directly replace conventional return oil filters of the same specifications without the need to modify the original pipelines, making it more adaptable.

The differential pressure transmitter triggers an alarm in advance. First, check whether there is a short-term flow shock in the system. If the flow is stable, it indicates that the impurity content in the oil is high. Replace the new filter element to restore normal use; After replacing the core, there is a small amount of oil leakage. Check whether there are metal impurities attached to the sealing surface of the self sealing valve, clean the impurities, and then close the valve group again to restore the sealing performance; If there is abnormal noise during the initial operation of the system, open the exhaust valve at the top of the filter head to discharge the accumulated air inside, and the abnormal noise can be eliminated; The oil return rate significantly slows down in low-temperature environments, which is a normal phenomenon of increased oil viscosity. After the system runs for a period of time and the oil temperature rises, the oil return rate will naturally return to the normal range.