Xiwangcun Industrial Park, Muye District, Xinxiang, Henan, China [email protected]
The DC series moisture absorbing air filter is a specialized ventilation and protection device for hydraulic oil tanks, gearboxes, and oil storage containers, replacing traditional ordinary ventilation caps and integrating dual functions of dehumidification and particle filtration. The transparent shell is equipped with a color changing silicone moisture absorbing layer and a stainless steel filter screen, which synchronously intercepts moisture and impurities in the air when the device breathes. The moisture absorption saturation state can be visually observed. The standard threaded interface is directly compatible with most device ventilation ports and can be installed without modification, avoiding oil emulsification and particle pollution from the source.
The DC series moisture absorbing air filter is an integrated air purification and protection device developed specifically for various oil storage containers, lubrication equipment, and hydraulic systems. It integrates dual functions of air drying, dehumidification, and solid particle filtration, and is directly installed at the ventilation port of oil tanks, gearboxes, oil storage tanks, and other equipment, replacing traditional ordinary ventilation caps. It can synchronously intercept moisture and solid impurities in the air entering the system during the equipment breathing process, and prevent lubricating oil and hydraulic oil from being affected by moisture, emulsification, and particle pollution from the source. It is a key peripheral protective component in various closed oil storage and lubrication systems to ensure oil quality and extend equipment service life.
| Product brand | DFFILTRI |
| Model | DC |
| Moisture absorbing medium | Color changing silicone gel (blue to powder after saturation) |
| Adaptation scenarios | Hydraulic oil tank, gearbox, oil storage tank vent |
The DC series moisture absorbing air filter adopts a high-strength polycarbonate transparent shell, filled with high adsorption capacity color changing silicone gel as the core moisture absorbing medium, and equipped with multiple layers of stainless steel sintered filter screen as the solid particle filter layer. When the equipment performs breathing action, the external moist and dusty air first passes through the particle filter screen to intercept solid impurities, and then flows through the silicone moisture absorbing layer to deeply remove water vapor from the air. The dry and clean air enters the interior of the equipment, and the secondary filtration can be completed synchronously when the internal air of the equipment is discharged; The transparent shell allows for intuitive observation of the moisture absorption and color change status of silicone, making it easy for maintenance personnel to timely grasp the timing of consumable replacement. The bottom is equipped with standardized threaded connection interfaces, which can directly adapt to the installation positions of most conventional fuel tanks and gearboxes' ventilation ports. Different flow requirements can be directly selected with corresponding models without the need for additional customized adapter structures.



The DC series moisture absorbing air filter is widely suitable for ventilation and protection scenarios in various industrial oil storage and lubrication systems. It can be used for ventilation and dehumidification protection of hydraulic oil tanks, modification of gearbox respirators, purification of breathing ports in large oil storage tanks, air drying and filtration of transformer oil pillows, and interception of impurities at the ventilation end of lubricating oil stations. It is particularly suitable for production scenarios with high requirements for oil moisture content and cleanliness, and high environmental humidity where equipment is located. It can effectively delay the speed of oil emulsification and deterioration caused by moisture, reduce the frequency of oil replacement, and lower the risk of corrosion and wear of downstream hydraulic and lubrication components.



Compared to traditional ordinary ventilation caps, the DC series moisture absorbing air filter has dual functions of dehumidification and particle filtration, no longer just a single particle interception. It can significantly reduce the moisture content of the air entering the system from the source, and the oil emulsion deterioration cycle can be extended by more than twice; The fully transparent visual shell allows operation and maintenance personnel to directly observe the saturation state of silicone moisture absorption without dismantling the equipment. The timing of consumable replacement is intuitive and clear, avoiding waste caused by excessive use or early replacement; Silicone moisture absorbing media can be regenerated or replaced separately, without the need to replace the entire shell, resulting in lower long-term operation and maintenance costs; The standardized multi specification threaded interface covers the vast majority of industrial equipment ventilation ports, with strong installation adaptability, and can be quickly replaced without any modification to the original equipment structure.
The outer shell of the respirator has condensation and the discoloration speed of the silicone gel is much faster than expected. First, check whether the operating environment of the equipment has been in a high humidity state for a long time. A pre coarse filter can be added to the intake side of the respirator to reduce the direct contact of large volume water vapor and debris with the moisture absorbing medium, which can effectively delay the saturation speed of the silicone gel; After installation, if there is oil leakage at the ventilation port position, check whether the internal ventilation channel of the respirator is completely blocked by impurities, which leads to poor breathing and pressure relief inside the equipment. After stopping the machine to relieve pressure, remove and clean the blocked debris or directly replace the filter element to restore normal ventilation; The shell has slight cracking. Check if the threads are tightened during installation. When replacing the new shell and installing it, control the tightening force to ensure that the seal is in place. Do not tighten it forcefully; It is difficult to replace silicone after it becomes saturated with moisture. You can simply unscrew the top end cap to remove the moisture absorbing core and replace it with a new silicone medium. Maintenance can be quickly completed without disassembling the overall structure.