Product Introduction
Hydraulic oil filters. Hydraulic oil filter elements are the core components for contamination control in hydraulic systems. During system circulation, they continuously remove solid particles, metallic wear debris, fibrous impurities, and gelatinous oxidation products, maintaining fluid cleanliness within the allowable contamination levels required by critical components such as servo valves, proportional valves, piston pumps, and hydraulic cylinders. Filter element performance directly determines system reliability, component service life, and overall equipment operating costs.hydraulic oil filters.
Structurally, a hydraulic filter element typically consists of filter media, end caps, an inner support core, an outer protective sleeve, and sealing elements. The filter media-made from high-precision glass fiber, synthetic fibers, or metal wire mesh-are pleated or wound to provide large specific surface area, high dirt-holding capacity, and low flow resistance. End caps and support cores are manufactured from metal or engineering plastics to ensure collapse resistance and structural rigidity under frequent pressure shocks. Seals are chosen from elastomers compatible with the fluid medium (e.g., NBR, FKM, or EPDM) to prevent any internal bypass of unfiltered oil.
In terms of performance grading, hydraulic filter elements are tested in accordance with international standards: ISO 16889 for multi-pass testing to determine filtration ratio β(x) and dirt-holding capacity; ISO 2941 for collapse resistance validation; ISO 2942 for fabrication integrity; and ISO 2943 for material/fluid chemical compatibility. Filtration ratings vary by application, ranging from 1–3 μm (high-precision servo systems) to 25–50 μm (low-pressure return-line coarse filtration). Nominal flow rates cover from tens to over one thousand liters per minute, while operating pressures range from low-pressure return lines (≤1.6 MPa) to high-pressure lines (up to 42 MPa).
Product Parameter
| Parameter | Description / Typical Value |
|---|---|
| Filtration Rating | 3 μm, 5 μm, 10 μm, 20 μm, 50 μm (optional) |
| Nominal Flow Rate | 25 L/min – 1,000 L/min (model dependent) |
| Operating Pressure | 0.6 MPa – 42 MPa (high-pressure versions up to 42 MPa) |
| Burst Pressure | ≥ 21 MPa (depending on media and design) |
| Initial Pressure Drop | ≤ 0.08 MPa (clean condition, at rated flow) |
| Alarm Differential Pressure | 0.3 MPa – 0.5 MPa (recommended change value) |
| Maximum Operating Temperature | -10 °C – +120 °C (seal material dependent) |
| Compatible Fluids | Mineral oils, synthetic hydraulic fluids, water-glycol emulsions, biodegradable oils |
| Filter Media Type | Glass fiber (fine filtration), metal wire mesh (coarse filtration), resin-impregnated fiber |
| End Cap Material | Zinc-plated carbon steel / Stainless steel / Engineering plastic |
company advantage
Invest in a genuine filter to save big. Extend equipment lifespan and reduce costly repairs.
Packaging and transportation
We are pleased to present our comprehensive packaging and transportation solutions tailored specifically for your international trade operations. Our services are designed to ensure that your goods reach their global destinations safely, efficiently, and in full compliance with all relevant customs and shipping regulations.
company profile
Xinxiang Jun Filters and Chemical Co.,Ltd.is a professional manufacturer engaged in the design and production of filters,filtration equipment, purification devices, and oil-water separation devices.The company has gathered a large number of professional, senior engineers and other technological elites, specializing in design research and development manufacturing.
The R&D team is strong, with a high level of professional technology and rich practical experience. The company has advanced production equipment and a complete quality and safety assurance system.
FAQ
Q: How to select the correct filtration rating?
A: It depends on the smallest clearances of critical system components. General guideline: 3–5 μm for servo valve systems, 10 μm for proportional valve systems, and 10–20 μm for general industrial systems. Overly high rating increases pressure drop, while too low rating fails to protect components.
Q: What are the risks of continuing to operate after the differential pressure alarm triggers?
A: The bypass valve opens, allowing unfiltered oil to enter the system and accelerating pump/valve wear. The element may also collapse under excessive pressure, releasing debris into the oil circuit and causing severe equipment damage.
Q: Is new oil clean enough without pre-filtration?
A: New oil is not necessarily clean oil. Drum oil often contains particles introduced during transport and storage. It should be pre-filtered through a separate unit before filling; otherwise, it will quickly contaminate the new element.
Q: Why does the differential pressure remain high after replacement?
A: Possible causes include: excessively high oil viscosity due to low temperature, the housing vent valve not opened, seal misalignment causing internal bypass, or high free particle load in the system. Check each possibility in order.
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