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Filter Elements
Filter elements are the core of every hydraulic filter and are crucial for the protection and efficiency of hydraulic systems. They reliably remove particles and contaminants from the hydraulic fluid, thereby preventing wear, damage, and loss of performance. Learn more...
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In the Hydromot online shop you will find a wide range of filter elements in OEM quality, manufactured from high-quality materials such as stainless steel wire mesh, fiberglass, or cellulose. Different filtration ratings from 3 to 90 µm ensure optimum adaptation to every application. Our filter elements are used in suction, pressure, and return filters and are suitable for industrial hydraulics, mobile hydraulics, and process engineering. Discover high-quality hydraulic filter elements now that extend the service life of your system and ensure maximum operational reliability.
Hydraulic Filter Elements – Frequently Asked Questions
What are filter elements in hydraulic systems and what is their function?
Filter elements are the essential consumables in hydraulic filters. Their task is to remove particles and contaminants from the hydraulic fluid to protect the system against wear, damage, and loss of performance. They extend the service life of system components, increase efficiency, and ensure trouble-free operation. Depending on the application, they are available in different designs and filtration ratings.
What materials are hydraulic filter elements made of and what advantages do they offer?
- Wire mesh: Usually stainless steel, robust, with low flow resistance, washable, and reusable.
- Depth filter media: Multi-layer fiberglass mats, high dirt-holding capacity with low flow resistance (e.g., PS, Sm-N according to ISO 16889).
- Cellulose or polyester-glass fiber layers: Cost-effective, suitable for applications with lower requirements.
What filtration ratings are available for filter elements and why is correct selection important?
Filter elements are available in filtration ratings from approx. 2 µm to 500 µm. Common values are 10, 25, 40, or 60 µm. The correct selection is crucial to reliably remove the relevant particle sizes in the system and optimally protect sensitive components. It depends on:
- System pressure and flow rate
- Sensitivity of components
- Hydraulic fluid and operating temperatures
- ISO standards and manufacturer specifications
What types of hydraulic filters exist and where are they used?
- Suction filters: Installed before the pump, protection against reservoir contamination.
- Pressure filters: Installed after the pump, protection of sensitive components (e.g., proportional valves).
- Return filters: Installed in the return line before the reservoir, cleaning the oil before re-entry into the tank.
Application areas: mobile hydraulics (construction machinery), industrial hydraulics (production equipment), process engineering, test stands.
Why is regular maintenance and replacement of hydraulic filter elements so important?
Filter elements are consumables whose dirt-holding capacity decreases over time. A clogged element causes increased differential pressure, loss of performance, and in the worst case, damage to the system. Hydromot recommends replacement at least once a year or after 1000 operating hours. Regular maintenance preserves filter efficiency and extends the service life of the entire system.
How can you determine the right time for a filter change and what inspection methods are available?
- Maintenance intervals: Replacement at least once a year or after 1000 operating hours.
- Clogging indicators: Signal replacement at a preset differential pressure.
- Visual inspection: Check for damage or clogging.
- Differential pressure measurement: Provides information about the degree of contamination.
- Functional check: Inspect tightness and condition of housing and seals.
Can all filter elements be cleaned and reused?
- Surface filters (e.g., stainless steel wire mesh): Often washable (e.g., ultrasonic bath), reusable up to three times.
- Depth filters (e.g., fiberglass mats): Not cleanable, as dirt is retained throughout the depth. Must be replaced.
What role do ISO standards and manufacturer recommendations play in the selection and maintenance of hydraulic filter elements?
ISO standards and manufacturer recommendations form the basis for the selection and maintenance of filter elements. They define requirements for pressure, flow, filtration rating, and oil compatibility. Selection should be based on expected particle sizes, ISO specifications, and manufacturer guidelines. Specialist suppliers such as Hydromot support the selection and preparation of individual maintenance plans to ensure efficiency and extend the service life of the system. Compliance with these guidelines guarantees operational safety and reliability.