High-pressure filters with 20L/min flow
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High-pressure filters 20 l/min universal hydraulic filters for pressure lines
High-pressure filters with flow rates up to 20 l/min (complete pressure filters mounted directly on the discharge line, including compact FHM, FHP, FMM series and dedicated glass microfiber elements) are specialized filtration devices designed for operation in precise power hydraulics circuits. Mounted on the pressure line behind the supply pump and directly before delicate proportional valves, servo valves, valve blocks, and actuators, they provide absolute protection against mechanical contamination. This category includes complete rigid filters made of ductile iron or forged steel, miniature housings, and replaceable filter elements adapted to operate at a maximum working pressure from 280 bar to 420 bar and a nominal flow of 20 l/min (for oil with a viscosity of 30 cSt / HL 30 class). The availability of versions with a bypass valve (e.g., 6 bar) and options without a bypass (with elements with increased crush resistance Δp = 210 bar) guarantees reliable cleanliness of the working medium in hydraulic micro-systems, industrial machines, vacuum-test stations, and small power units.
Application and technical characteristics of high-pressure filters 20 l/min
Compact high-pressure hydraulic filters with a capacity of up to 20 l/min are used in applications where high operating pressure is combined with a low oil flow rate. Their main task is to capture microscopic abrasive particles generated by the hydraulic pump before they reach precise control gaps in valves and motors.
- High pressure resistance (280–420 bar): Massive steel and cast iron housings easily withstand shocks, pulsations, and sudden pressure spikes in the discharge circuit.
- Exceptional filtration accuracy (10 µm – 25 µm): Inorganic Microfiber elements trap contaminants of microscopic diameters, ensuring a βx ≥ 200 ratio.
- Protection of micro-hydraulics and servo valves: High oil cleanliness class according to ISO 4406 (e.g., 16/14/13) prevents sticking of directional valve spools and seizing of mounting elements.
- Options with clogging indicator: Integrated sockets on the head allow for the installation of an optical (visual) or electrical differential indicator signaling element clogging.
- Compact dimensions and standardized connections: Small body sizes with 3/8" BSP or 1/4" BSP threads enable installation in tight machine spaces.
Why choose high-pressure filters 20 l/min at the HYDRON store?
All high-pressure filters 20 l/min distributed by the HYDRON store meet the rigorous quality criteria of ISO 9001 standards and CE pressure directives. They are characterized by 100% hydraulic tightness and full resistance to mineral and synthetic oils, and HFD-type hydraulic fluids. Pressure filters work in the most difficult zone of the circuit, therefore using proven housings prevents leaks and catastrophic component failures. For comprehensive construction and service of compact pressure systems, we recommend selecting other compatible products from our offer, such as efficient piston hydraulic pumps, flexible high-pressure hydraulic hoses, precise hydraulic directional control valves and reliable 700 bar hydraulic valves.
Technical specification
Technical parameter | Value / Description |
|---|---|
Product category | High-pressure filters (flow up to 20 l/min / pressure line filters) |
Maximum nominal flow | 20 l/min (for oil with 30 cSt viscosity / HL 30 class) |
Operating pressure range | from 280 bar to 420 bar (28 – 42 MPa / 6000 PSI) |
Housing and head material | Ductile iron / steel head, forged steel bowl |
Bypass valve versions | With built-in 6 bar bypass or without bypass (element resistance Δp = 210 bar) |
Element filtration accuracy | 10 µm, 25 µm (glass microfiber / stainless steel mesh) |
Clogging indicator ports | Designed for optical indicator or electrical differential indicator (5 bar) |
Compatible series and replacements | MP Filtri FHP 010 / FHM 010 / FMM 050, Hydac, Parker, AHC, Hydrolider |
Frequently Asked Questions (FAQ)
Where are 20 l/min high-pressure filters used?
High-pressure 20 l/min filters are installed on the pressure line after the main pump, and directly before precise proportional valves, servo valves, clamping systems, and hydraulic motors in small power packs and micro-systems.
Why are filters without bypass used in systems with servo valves?
A filter without a bypass valve does not allow even a single drop of unfiltered oil to reach the consumer even after the element is clogged. In such cases, elements with increased collapse pressure resistance (Δp = 210 bar) are used, which absolutely protects expensive servo valves from seizing.
Which filter elements provide the best fluid cleanliness?
The highest efficiency in trapping particles is provided by multi-layer glass microfiber (Inorganic Microfiber) elements with 10 µm accuracy, which feature a high filtration ratio βx ≥ 200.
How to check the wear status of the element in a pressure filter?
The element status is verified using an optical or electrical differential indicator mounted in the filter head, which signals an increase in pressure drop after exceeding a set threshold (usually 5 bar).