{"id":2913,"date":"2024-03-06T16:14:39","date_gmt":"2024-03-06T15:14:39","guid":{"rendered":"https:\/\/www.bf-hydraulik.com\/encyclopedia\/high-pressure-filters\/"},"modified":"2026-04-15T11:54:25","modified_gmt":"2026-04-15T09:54:25","slug":"high-pressure-filters","status":"publish","type":"encyclopedia","link":"https:\/\/www.bf-hydraulik.com\/en\/high-pressure-filters\/","title":{"rendered":"High-pressure filters"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"2913\" class=\"elementor elementor-2913 elementor-543\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-735b55f8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"735b55f8\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-2820cb8b\" data-id=\"2820cb8b\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9fb9997 elementor-widget elementor-widget-text-editor\" data-id=\"9fb9997\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h1>Comparison of high-pressure and medium-pressure filters<\/h1><p><a href=\"https:\/\/www.bf-hydraulik.com\/en\/high-pressure-filters\/\" target=\"_self\" title=\"Comparison of high-pressure and medium-pressure filtersHigh-pressure filters are primarily used in high-pressure circuits of hydraulic systems with alternating flow directions. The two most important performance characteristics are wear protection and&hellip;\" class=\"encyclopedia\">High-pressure filters<\/a> are primarily used in high-pressure circuits of <a href=\"https:\/\/www.bf-hydraulik.com\/en\/hydraulic-system\/\" target=\"_self\" title=\"Hydraulic system: design &amp; applications explained simplyA hydraulic system is used to apply large forces in a targeted manner over a defined distance with minimal effort. The underlying hydraulic principle&hellip;\" class=\"encyclopedia\">hydraulic system<\/a>s with alternating flow directions. The two most important performance characteristics are wear protection and functional protection. Wear protection is achieved through filter elements that meet the highest requirements for the respective cleanliness class during full-flow filtration.  <\/p><p>The filter fineness typically varies between 5 &micro;m and 30 &micro;m. This relatively coarse filter fineness is due to the fact that <a href=\"https:\/\/www.bf-hydraulik.com\/en\/high-pressure-filters\/\" target=\"_self\" title=\"Comparison of high-pressure and medium-pressure filtersHigh-pressure filters are primarily used in high-pressure circuits of hydraulic systems with alternating flow directions. The two most important performance characteristics are wear protection and&hellip;\" class=\"encyclopedia\">high-pressure filters<\/a> are mainly used as pure protective filters. <a href=\"https:\/\/www.bf-hydraulik.com\/en\/high-pressure-filters\/\" target=\"_self\" title=\"Comparison of high-pressure and medium-pressure filtersHigh-pressure filters are primarily used in high-pressure circuits of hydraulic systems with alternating flow directions. The two most important performance characteristics are wear protection and&hellip;\" class=\"encyclopedia\">High-pressure filters<\/a> are among the most expensive filters in hydraulics. These filters are therefore precisely adapted to the maximum flow rate of the <a href=\"https:\/\/www.bf-hydraulik.com\/en\/hydraulic-system\/\" target=\"_self\" title=\"Hydraulic system: design &amp; applications explained simplyA hydraulic system is used to apply large forces in a targeted manner over a defined distance with minimal effort. The underlying hydraulic principle&hellip;\" class=\"encyclopedia\">hydraulic system<\/a>.    <\/p><h2>High-pressure filters with reversing control<\/h2><p>In high-quality <a href=\"https:\/\/www.bf-hydraulik.com\/en\/high-pressure-filters\/\" target=\"_self\" title=\"Comparison of high-pressure and medium-pressure filtersHigh-pressure filters are primarily used in high-pressure circuits of hydraulic systems with alternating flow directions. The two most important performance characteristics are wear protection and&hellip;\" class=\"encyclopedia\">high-pressure filters<\/a>, a so-called Graetz circuit is integrated into the filter head. This circuit ensures that the hydraulic medium used is filtered in both flow directions. This high-quality class of <a href=\"https:\/\/www.bf-hydraulik.com\/en\/high-pressure-filters\/\" target=\"_self\" title=\"Comparison of high-pressure and medium-pressure filtersHigh-pressure filters are primarily used in high-pressure circuits of hydraulic systems with alternating flow directions. The two most important performance characteristics are wear protection and&hellip;\" class=\"encyclopedia\">high-pressure filters<\/a> is characterized by a filter material formed in a star-pleated design.  <\/p><p>This results in several advantages, such as:<\/p><ul><li>Very long maintenance intervals (especially when using <br>an optical or electrical clogging indicator)<\/li><li>Low pressure losses<\/li><li>Large filter surfaces<\/li><li>High dirt-holding capacities<\/li><\/ul><h3>General information on medium-pressure filters<\/h3><p>Medium-pressure filters are characterized by the same structural design. Only their versatile application in the medium pressure range (around 40 bar) distinguishes them from <a href=\"https:\/\/www.bf-hydraulik.com\/en\/high-pressure-filters\/\" target=\"_self\" title=\"Comparison of high-pressure and medium-pressure filtersHigh-pressure filters are primarily used in high-pressure circuits of hydraulic systems with alternating flow directions. The two most important performance characteristics are wear protection and&hellip;\" class=\"encyclopedia\">high-pressure filters<\/a>. Conventional applications for medium-pressure filters include:  <\/p><ul><li><a href=\"https:\/\/www.bf-hydraulik.com\/en\/hydraulic-system\/\" target=\"_self\" title=\"Hydraulic system: design &amp; applications explained simplyA hydraulic system is used to apply large forces in a targeted manner over a defined distance with minimal effort. The underlying hydraulic principle&hellip;\" class=\"encyclopedia\">Hydraulic system<\/a>s in the medium pressure range<\/li><li>Pressure lubrication<\/li><li>Use in feed pumps of hydrostatic travel drives<\/li><\/ul><p>The filter head of standard medium-pressure filters with a bypass valve consists of anodized aluminum, which yields at a burst pressure of 300 bar. Similar to <a href=\"https:\/\/www.bf-hydraulik.com\/en\/high-pressure-filters\/\" target=\"_self\" title=\"Comparison of high-pressure and medium-pressure filtersHigh-pressure filters are primarily used in high-pressure circuits of hydraulic systems with alternating flow directions. The two most important performance characteristics are wear protection and&hellip;\" class=\"encyclopedia\">high-pressure filters<\/a>, filter elements made of microfiber or wire mesh are frequently used materials. When configuring the intended properties, particular attention is paid to high efficiency in the separation of solid particles in this filter design.  <\/p><p>Typical application areas for medium-pressure filters include mounting on control blocks and installation in various pipelines in hydraulic medium-pressure systems. This type of filter is used for the direct protection of control and regulation units (servo valves, <a href=\"https:\/\/www.bf-hydraulik.com\/en\/proportional-valve\/\" target=\"_self\" title='Proportional ValveProportional valves in hydraulics are used for precise and controlled regulation of hydraulic pressure. These valves do not merely \"open\" and \"close\" but also enable all other pressure states&hellip;' class=\"encyclopedia\">proportional valve<\/a>s). Low pressure loss in the filters is achieved through a flow-optimized design of the components. Further objectives in the design of these medium-pressure filters include high differential pressure stability, high dirt-holding capacity of the elements, and service-friendly handling.   <\/p><h3>Comparison of high-pressure and medium-pressure filters<\/h3><p>The essential components of medium- and <a href=\"https:\/\/www.bf-hydraulik.com\/en\/high-pressure-filters\/\" target=\"_self\" title=\"Comparison of high-pressure and medium-pressure filtersHigh-pressure filters are primarily used in high-pressure circuits of hydraulic systems with alternating flow directions. The two most important performance characteristics are wear protection and&hellip;\" class=\"encyclopedia\">high-pressure filters<\/a> differ only slightly in appearance. The filter element, filter head, filter bowl, clogging indicator, and bypass valve differ only in the choice of material and the dimensioning or design. The housing (of <a href=\"https:\/\/www.bf-hydraulik.com\/en\/high-pressure-filters\/\" target=\"_self\" title=\"Comparison of high-pressure and medium-pressure filtersHigh-pressure filters are primarily used in high-pressure circuits of hydraulic systems with alternating flow directions. The two most important performance characteristics are wear protection and&hellip;\" class=\"encyclopedia\">high-pressure filters<\/a>?) is characterized by a significantly higher wall thickness.  <\/p><p>Medium- and <a href=\"https:\/\/www.bf-hydraulik.com\/en\/high-pressure-filters\/\" target=\"_self\" title=\"Comparison of high-pressure and medium-pressure filtersHigh-pressure filters are primarily used in high-pressure circuits of hydraulic systems with alternating flow directions. The two most important performance characteristics are wear protection and&hellip;\" class=\"encyclopedia\">high-pressure filters<\/a> can be designed as switchable duplex filters. This allows for uninterrupted continuous operation of the machine or system, and the filter can be maintained or replaced at leisure. Special forms of these filters for the effective protection of particularly sensitive components are inline filters or so-called last-minute filters.  <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-17578f6\" data-id=\"17578f6\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-18d5d30 elementor-widget elementor-widget-sidebar\" data-id=\"18d5d30\" data-element_type=\"widget\" data-widget_type=\"sidebar.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div style=\"display:none;\">Search<\/div><form role=\"search\" method=\"get\" class=\"encyclopedia search-form\" action=\"https:\/\/www.bf-hydraulik.com\/en\/encyclopedia\/\">\n    \n    \n    <label class=\"screen-reader-text\" 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