The TF series external self sealing oil suction filter is designed specifically for hydraulic systems, with exposed filter heads and oil immersed cylinder bodies. It comes with a self sealing valve for leak free maintenance. Filtering accuracy of 10-180 μ m, adaptable to multiple scenarios, integrated bypass protection and pollution warning, effectively extending equipment life and reducing maintenance costs.
The TF series external self sealing oil suction filter is a core filtration equipment designed specifically for hydraulic systems. By intercepting solid particles, metal debris, rubber impurities and other pollutants in the oil, it protects the oil pump, hydraulic valve and actuating components from the source, extends equipment life and improves system reliability. Its innovative "self sealing outside the tank" structure immerses the oil suction cylinder below the liquid level of the tank, exposes the filter head outside the tank, and integrates three core devices: self sealing valve, bypass valve, and pollution transmitter, achieving the dual goal of "maintaining zero leakage and high reliability operation".
| Brand Name | DFFILTRI |
| Filter model | TF |
| Connection method | threaded connection or flange connection |
| Filtration accuracy(μm) | 80 100 180 |
1. Self sealing valve
When it is necessary to replace or clean the filter element, simply unscrew the filter end cover, the self sealing valve will automatically close, isolate the oil circuit, and completely prevent the oil tank from overflowing. This design eliminates the need for traditional filters to empty the fuel tank and install shut-off valves, reducing maintenance time by over 60%. For example, in the hydraulic system of a steel rolling mill in the metallurgical industry, there is no need to stop and release pressure when replacing the filter element. The operation can be directly completed while the equipment is in operation, avoiding production losses caused by shutdown.
2. Bypass valve and pollution transmitter
Pollution warning: When the filter element is blocked and the vacuum degree at the oil outlet rises to 0.018MPa, the pollution transmitter triggers an audible and visual alarm, prompting timely replacement of the filter element.
Emergency protection: If not dealt with in a timely manner, when the vacuum degree reaches 0.02MPa, the bypass valve will automatically open, allowing oil to bypass the filter element and directly enter the system, avoiding equipment damage caused by oil pump suction. This mechanism provides a critical buffer period for downtime maintenance, ensuring the continuous operation of the system.
The TF series external self sealing oil suction filter has become the preferred filtration solution in the following fields due to its wide flow range, multi-media compatibility, and flexible installation method:
1. Metallurgical industry
Lubrication and filtration of hydraulic systems for rolling mills and continuous casting machines, effectively intercepting iron oxide scales and metal debris generated in high-temperature environments.
2. Petrochemical field
oilfield water injection system, natural gas particle separation, resistant to corrosive media, filtration accuracy up to 10 μ m.
Energy equipment: Purification of lubricating system oil for thermal power/nuclear electrical turbines to ensure stable operation of equipment in high temperature and high pressure environments.
3. Precision manufacturing
hydraulic systems for injection molding machines and die-casting machines to avoid mold wear caused by impurities and improve product yield.
4. Electronic pharmaceuticals
reverse osmosis water pretreatment, glucose solution filtration, meeting the strict requirements of clean room for oil cleanliness.
1. Structural innovation: Simplify pipelines and reduce overall costs
The TF series external self sealing oil suction filter adopts a "filter head exposed+oil suction cylinder immersed" design, and the oil outlet is directly integrated with a pipe or flange interface, eliminating the need for additional shut-off valves and fittings. The pipeline layout is simplified by 40%, and the installation cost is reduced by 30%. For example, in ship hydraulic systems, compact design saves valuable engine room space while reducing the risk of oil leakage.
2. Durable material: Suitable for harsh working conditions
The TF series self sealing oil suction filter head is made of aviation grade aluminum material, which has strong corrosion resistance; The filter element is made of stainless steel metal mesh, with a compressive strength of 1.6MPa and a lifespan 2-3 times longer than traditional paper filters. In the vibration environment of mining machinery, the impact resistance of metal filters is significantly better than that of paper filters, reducing maintenance costs for frequent replacement.
1. Frequent blockage of filter element
Reason: Severe hydraulic oil pollution, improper selection of filter element accuracy, and unfiltered system return oil.
Solution: Regularly check the cleanliness of the oil and select the filtration accuracy that matches the system requirements; Install a return oil filter in the return oil pipeline to form a dual filtration system of "oil suction+return oil".
2. Self sealing valve failure
Reason: Aging of seals, impurities stuck, improper installation.
Solution: Replace the seals every 5000 hours; Clean the self sealing valve seat when replacing the filter element; Ensure that the installation level error of the filter is ≤ 0.5 °.
3. Incorrect opening of bypass valve
Reason: System pressure fluctuations, deviation from vacuum setting value.
Solution: Use a pressure gauge to calibrate the working pressure of the system, ensuring that it is within the rated range of the filter; Contact the manufacturer to reset the opening pressure of the bypass valve (default 0.02MPa).
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