DFF series high-pressure filter hydraulic system pipeline filter

The DFF series high-pressure filter is a stacked precision purification device designed specifically for the end of high-pressure hydraulic system pipelines. It adopts a stacked valve plate integrated installation structure and can be directly stacked on the oil inlet end face of high-pressure valve groups, oil cylinders and other components without occupying additional pipeline layout space. It relies on the installation holes of high-pressure components to achieve oil circuit docking and completes the final stage of high-precision purification before high-pressure oil enters the end execution or control components, avoiding small impurities from scratching the high-precision mating surfaces of valve cores, cylinder barrels and other components from the source. It is an exclusive protective component for end precision components in high-pressure hydraulic systems, suitable for various medium and high-pressure hydraulic systems with stacked valve group layouts and extremely limited installation space.

The DFF series high-pressure filter adopts a high-strength integrated forged shell, which has undergone a pressure burst test at twice the rated working pressure and can withstand high-frequency pressure shocks from high-pressure systems for a long time; Internally, a full flow precision fiberglass filter element without bypass is used, with a filtration accuracy covering the range of 1 μ m to 10 μ m. All high-pressure oil flowing through the end components is 100% intercepted by the filter element, completely preventing unfiltered oil from directly entering downstream components; Equipped with an integrated high-pressure differential transmitter, the transmission contact is directly embedded in the side housing of the filter, without the need for additional external pipelines. When the filter element is blocked and the pressure differential reaches the threshold of 0.2MPa, a warning signal can be directly sent to the system's electronic control unit to remind maintenance personnel to replace the filter element in a timely manner; The import and export completely adopt a stacked standard oil port layout, which matches the installation hole position of conventional stacked valves perfectly. There is no need to weld additional holes on the high-pressure pipeline, and the overall structure is compact without protruding external components after installation.

The DFF series high-pressure filter is widely suitable for purifying the oil inlet of various end components of medium and high-pressure hydraulic systems. It can be used for high-precision servo valve inlet, high-pressure proportional valve group stacking surface, precision cylinder rodless chamber inlet, CNC equipment high-pressure hydraulic valve island, high-precision hydraulic control unit of testing machine, robot hydraulic joint oil circuit and other working conditions. It is particularly suitable for high-pressure operation scenarios with extremely small end component fitting clearance, high requirements for oil cleanliness, and no excess pipeline installation space around. It can effectively intercept small hard particles remaining in the high-pressure oil circuit, avoid common precision component failures such as valve core jamming and cylinder inner wall scratches.

Compared to the DFB series pipeline type high-pressure filter, this DFF series high-pressure filter adopts a stacked integrated installation structure, completely eliminating the external filtering pipeline on the high-pressure side. The overall layout of the system is more compact, and the number of leakage points in the high-pressure oil circuit is greatly reduced, reducing the probability of high-pressure leakage failure from a structural perspective; Full flow non bypass design ensures that all oil entering downstream precision components undergoes high-precision filtration, preventing impurities from bypassing the filter element and directly entering the components. This greatly improves the reliability of end protection; The installation method of directly stacking on the end face of the valve group does not require modification of the original high-pressure pipeline, making replacement or installation extremely convenient and compatible with the vast majority of standard stacking valve installation dimensions; There are no protruding external components as a whole, and it will not be affected by external device collisions and interference, making it more stable for long-term operation.

The system's electronic control unit frequently receives warning signals of filter blockage. First, check whether the system has been operating at an over rated flow rate for a long time. If the flow parameters are stable, it indicates that the filter has reached the blockage limit. After stopping the machine and releasing the pressure, disassemble the stacked end face and replace it with a new filter of the same precision to restore normalcy; Slight oil leakage occurs on the overlapping installation surface. Check if the sealing components on the overlapping surface have been deformed or displaced due to long-term high-pressure impact. Replace the high-pressure resistant O-ring of the same specification and tighten the installation bolts diagonally and evenly according to the specified torque to restore the seal; The end effector has intermittent jamming phenomenon. Check whether the filter element is locally damaged due to long-term use. After replacing the new filter element and cleaning the residual impurities in the downstream oil circuit, the operation of the component can be restored smoothly; The cleanliness of the filtered oil did not meet the expected standard. Check if the filter element was not completely aligned with the center oil port during installation, and if there was a bypass leak. Re position the filter element correctly and confirm that the sealing structure is fully fitted. After that, the filtration accuracy can be restored to the design standard.