Raw Materials:
Filter Media: Commonly used filter materials include glass fiber, stainless steel mesh, copper mesh, or polymeric materials (such as polyester fiber). These materials possess excellent filtering efficiency and corrosion resistance, effectively removing impurities and particles from the oil to ensure its cleanliness.
Housing Material: The filter housing is typically made of cast iron, stainless steel, or aluminum alloy, which provide high structural strength and corrosion resistance, enabling them to withstand the working pressure and harsh environments of hydraulic systems.
Sealing Material: To ensure the filter's sealing performance and prevent oil leakage, rubber, silicone, or other polymeric sealing materials are employed.
Technical Specifications:
| Technical Specification | Description/Range |
|---|---|
| Filtration Accuracy | Typically ranging from a few microns to several tens of microns, depending on the filter model and application scenario. Higher filtration accuracy results in better filtering but may also increase filtering resistance. |
| Nominal Flow Rate | Indicates the maximum flow rate allowed by the filter under rated working pressure, usually measured in L/min. This varies widely from tens of L/min for small equipment to thousands of L/min for large equipment, depending on the filter model and specifications. |
| Nominal Pressure | Indicates the maximum pressure the filter can withstand under normal operating conditions, typically measured in MPa. Direct-return self-sealing oil return filters generally have high nominal pressures to meet the pressure requirements of hydraulic systems. |
| Operating Temperature | Refers to the temperature range within which the filter can operate normally. Standard hydraulic oil operates between -30°C and 110°C, and the filter design must comply with this requirement. Wider temperature ranges may be necessary for specific applications. |
| Connection Type | Common connection types include threaded connections and flange connections. The specific type chosen depends on the filter's installation location and system requirements. |
| Filter Medium | Direct-return self-sealing oil return filters are primarily used to filter oil in hydraulic systems, including standard hydraulic oil, water-glycol mixtures, etc. The specific medium depends on system requirements. |
| Additional Features | Some direct-return self-sealing oil return filters are equipped with accessories such as senders and bypass valves, enabling automatic alarms, online cleaning, or preventing system pressure surges caused by clogged filter elements. |
It is essential to note that the above technical specifications are general ranges, and specific values need to be determined based on the model and brand of the direct-return self-sealing oil return filter. When selecting and using these filters, it is crucial to consult product manuals and related technical data to ensure they meet the system's requirements. Regular inspection and maintenance of the filters are also necessary to ensure their proper operation and extended service life.
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