PLF series pressure pipeline filter Hydraulic system pressure pipeline purification device

The PLF series pressure pipeline filter is a precision pressure pipeline purification device developed for hydraulic systems with multiple pressure levels. It adopts a graded pressure resistance design concept and covers three complete pressure ranges: low pressure, medium pressure, and high pressure. It can be directly connected to the pressure pipeline between the hydraulic pump outlet and precision control components. With high-precision fiberglass filter material, it efficiently intercepts small impurities in the oil and prevents premature wear or jamming of high-precision control components and actuators in automatic control systems and servo systems due to pollution from the source. It is a key protective equipment in various precision hydraulic systems to ensure the cleanliness of the oil circuit and extend the service life of core components. It is suitable f

The PLF series pressure pipeline filter adopts imported glass fiber composite filter material, with filtration ratios of β 3, β 5, β 10, and β 20 not less than 200, and a filtration efficiency of over 99.5%. The accuracy covers the range of 1 μ m to 20 μ m, and the pollutant carrying capacity far exceeds that of ordinary filter cartridges with the same accuracy; The shell is divided into three pressure levels: C, E, and H, corresponding to rated working pressures of 6.3MPa, 16MPa, and 32MPa, respectively. Users can accurately select according to the actual pressure of the system to avoid cost waste caused by performance redundancy; The built-in differential pressure transmitter and bypass valve form a dual protection mechanism. When the filter element is blocked and the pressure difference reaches 0.35MPa, the transmitter automatically sends a warning signal. If the filter element is not replaced in time, the bypass valve will automatically open when the pressure difference further increases, ensuring continuous oil flow in the oil circuit without interruption; The upper cover of the filter cover can rotate 180 degrees as a whole. When the on-site pipeline direction does not match the standard flow direction, there is no need to adjust the installation direction of the filter. Simply remove the four connecting screws and rotate the upper cover to change the direction of the medium flow; The filter replacement provides a dual path design, allowing users to choose between opening the top cover to remove the filter element or unscrewing the bottom shell to remove the filter element from below according to the installation space on site, flexibly adapting to different installation environments.

The PLF series pressure pipeline filter is widely suitable for purifying the middle section of pressure pipelines in various precision hydraulic systems. It can be used in metallurgical continuous casting and rolling servo hydraulic stations, high-precision servo control systems for CNC machine tools, hydraulic power units for automated production lines, precision hydraulic circuits for engineering machinery, high-pressure hydraulic systems for mining comprehensive mining equipment, and hydraulic control devices for ships. It is particularly suitable for automatic control and servo system scenarios that require high oil cleanliness and minimal clearance between components. It can effectively intercept hard particles and gum impurities mixed in the pressure oil circuit, greatly reducing the probability of jamming and abnormal wear of servo valves, proportional valves, precision plunger pumps and other components.

Compared to conventional pressure pipeline filters with a single pressure level, the PLF series pressure pipeline filters adopt a three-stage pressure classification design of C, E, and H, covering the complete pressure range from low pressure to high pressure, with more accurate selection and better overall cost of use; The filtration performance indicators of high-precision fiberglass filter materials meet the internationally recognized hydraulic filtration standards, and the stability of filtration accuracy far exceeds that of conventional filter materials in the same price range. Long term use is not prone to filtration efficiency degradation; The adjustable flow direction design of the rotatable upper cover significantly reduces the cost of on-site pipeline renovation, especially suitable for renovation projects with complex pipeline layouts and limited directions; The dual path core replacement structure allows for flexible selection of maintenance methods based on the installation space around the device, without being limited by top or bottom space, greatly improving maintenance convenience; The overall structure is compact, with a volume reduction of about 30% compared to conventional pipeline filters under the same flow specifications, making it more suitable for use in integrated hydraulic stations with limited space.

The differential pressure transmitter frequently triggers warnings. 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 element has reached its blockage limit. After stopping the machine to release pressure, choose to replace the filter element with a new one of the same precision by opening the top or rotating the bottom shell according to the on-site space to restore normal operation; The on-site pipeline direction does not match the standard flow direction of the filter. There is no need to change the pipeline layout. Remove the four connecting screws on the upper cover, rotate the upper cover 180 degrees, and then tighten it again to change the direction of medium flow and adapt to the existing pipeline; Oil leakage occurs on the connecting surface of the shell. Check whether the sealing components have aged and deformed due to long-term pressure impact. Replace the oil resistant sealing components with the same specifications and tighten the connecting bolts evenly in diagonal order to restore the sealing performance; The system pressure suddenly fluctuates significantly. Check if the bypass valve is stuck in a normally open state due to impurities. After disassembling and cleaning the residual impurities in the bypass valve and reassembling it, the system pressure can be restored to stability.