{"id":529,"date":"2022-12-27T12:14:31","date_gmt":"2022-12-27T11:14:31","guid":{"rendered":"https:\/\/magazin.hytrade24.com\/knowledge\/hydraulic-valves\/"},"modified":"2023-08-08T16:16:30","modified_gmt":"2023-08-08T14:16:30","slug":"hydraulic-valves","status":"publish","type":"page","link":"https:\/\/hytrade24.com\/hydraulikmagazin\/en\/knowledge\/hydraulic-valves\/","title":{"rendered":"Hydraulic valves &#8211; Everything you need to know"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.19.4&#8243; _module_preset=&#8221;default&#8221; custom_margin=&#8221;-30px||||false|false&#8221; custom_padding=&#8221;||||false|false&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row _builder_version=&#8221;4.19.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.19.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text _builder_version=&#8221;4.19.5&#8243; _module_preset=&#8221;default&#8221; header_2_font_size=&#8221;23px&#8221; header_3_font=&#8221;|700|||||||&#8221; header_3_font_size=&#8221;23px&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h2><b>What is the function of a hydraulic valve?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\"><strong>Hydraulic valves <\/strong>are an important part of hydraulic systems and control or regulate the flow of hydraulic fluid (usually oil). Hydraulic valves control e.g. start, stop and direction as well as pressure or flow of the pressure medium delivered by a hydraulic pump. Valves are important components in hydraulic systems and help to ensure that they operate precisely and reliably.<\/span><\/p>\n<h3><b>How does a hydraulic valve work?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">The operation of a valve depends on the design. Basically, hydraulic valves are divided into so-called spool valves and poppet valves.<\/span><\/p>\n<p><strong>Gate valves<\/strong><span style=\"font-weight: 400;\">  usually have a control piston as a control element. This is moved within the housing bore. Depending on the position of the piston (spool) in the body bore, it either blocks or opens the connection between the channels in the valve body. The spool is guided in the housing with little clearance. The resulting liquid film between the components reduces friction. Spool valves are used, for example, with directional control valves.<\/span><\/p>\n<p>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.19.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p><span style=\"font-weight: 400;\">Compared to spool valves, poppet valves have <\/span><strong>Seat valves<\/strong><span style=\"font-weight: 400;\">  as a control element a ball, a cone or a plate. The control element locks or closes the valve cover by being pressed onto the valve seat by a spring. The channel is opened against the spring force, usually by the hydraulic medium. Compared to gate valves, poppet valves are characterized by high tightness. Seat valves are therefore preferably used where hydraulic circuits have to be shut off without leakage. Examples of shut-off valves are, for example, pressure relief or check valves.<\/span><\/p>\n<p>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.19.5&#8243; _module_preset=&#8221;default&#8221; header_4_font_size=&#8221;23px&#8221; header_5_font_size=&#8221;23px&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h4><b>What are the types of hydraulic valves?<\/b><\/h4>\n<p><span style=\"font-weight: 400;\">Hydraulic systems place high demands on hydraulic valves. Therefore, valves are required in a wide variety of installation methods. Basically, the construction types can be distinguished by the following installation methods:<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\">Panel-mounting valves (e.g. CETOP3)<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Valves for line installation<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Screw-in valves (also called cartridge valves) for block installation<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Intermediate plate valves<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Valves in disc design (also referred to as sandwich design)<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Monobloc valves<\/span><\/li>\n<\/ul>\n<h5><b>Hydraulic valves for the plate assembly<\/b><\/h5>\n<p><span style=\"font-weight: 400;\">Valves of this type can be screwed onto a sub-base (valve base plate) or manifold plate as individual valves. They can also be used as the top component of an elevator linkage (e.g. for hydraulic power packs). Plate-mounting valves are usually so-called  <\/span><a href=\"https:\/\/www.cetop.org\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">CETOP<\/span><\/a><span style=\"font-weight: 400;\">  Valves. These have standardized connection holes and a standardized plate structure, which enables extremely space-saving installation. The standardized connection dimensions for the individual CETOP valve sizes can be found in ISO 4401.<\/span><\/p>\n<p>[\/et_pb_text][et_pb_image src=&#8221;http:\/\/magazin.hytrade24.com\/wp-content\/uploads\/2022\/12\/4-3-wegeventil-scaled.jpg&#8221; alt=&#8221;4\/3 directional valve hydraulics picture&#8221; title_text=&#8221;4\/3 directional valve hydraulics&#8221; align=&#8221;center&#8221; _builder_version=&#8221;4.19.4&#8243; _module_preset=&#8221;default&#8221; width=&#8221;60%&#8221; custom_margin=&#8221;||50px|||&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][et_pb_text _builder_version=&#8221;4.19.5&#8243; _module_preset=&#8221;default&#8221; header_6_font_size=&#8221;20px&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h6><b>Valves for in-line installation (pipeline valves)<\/b><\/h6>\n<p><span style=\"font-weight: 400;\">Inline valves are installed directly in the hydraulic line and serve as intermediate elements. Hydraulic valves of this type are provided with threaded connections. Screw-in fittings are used for connection to hydraulic pipes or hose lines.<\/span><\/p>\n<p>[\/et_pb_text][et_pb_image src=&#8221;https:\/\/hytrade24.com\/hydraulikmagazin\/\/wp-content\/uploads\/2022\/12\/Rueckschlaventil-Rohrleitung.jpg&#8221; alt=&#8221;Check valve in pipeline design&#8221; title_text=&#8221;Check valve pipeline&#8221; align=&#8221;center&#8221; _builder_version=&#8221;4.19.4&#8243; _module_preset=&#8221;default&#8221; width=&#8221;40%&#8221; custom_margin=&#8221;||50px|||&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][et_pb_text _builder_version=&#8221;4.19.5&#8243; _module_preset=&#8221;default&#8221; header_6_font_size=&#8221;20px&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h6><b>Screw-in valves (cartridge valves) for block installation<\/b><\/h6>\n<p><span style=\"font-weight: 400;\">Screw-in valves are mounted directly in the screw-in bore of a control block or housing. The screw-in bore (many block manufacturers also refer to this as cavity) contains the central mounting thread and the holes for the hydraulic connections. It also provides appropriate sealing surfaces, depending on the valve design.<\/span><\/p>\n<p>[\/et_pb_text][et_pb_image src=&#8221;https:\/\/hytrade24.com\/hydraulikmagazin\/\/wp-content\/uploads\/2022\/12\/Einschraubventil-Hydraulik.jpg&#8221; alt=&#8221;Screw-in valve Cartridge valve Hydraulics&#8221; title_text=&#8221;Screw-in valve hydraulics&#8221; align=&#8221;center&#8221; _builder_version=&#8221;4.19.4&#8243; _module_preset=&#8221;default&#8221; width=&#8221;50%&#8221; custom_margin=&#8221;||50px|||&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][et_pb_text _builder_version=&#8221;4.19.5&#8243; _module_preset=&#8221;default&#8221; header_6_font_size=&#8221;20px&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h6><b>Intermediate plate valves<\/b><\/h6>\n<p><span style=\"font-weight: 400;\">For sandwich plate valves, both the top and bottom surfaces form the mating surfaces. Both the connection and mounting holes are routed through the valves. For this reason, several valves can be built. Intermediate plate valves are usually used for vertical stacking.  <\/span><\/p>\n<p>[\/et_pb_text][et_pb_image src=&#8221;https:\/\/hytrade24.com\/hydraulikmagazin\/\/wp-content\/uploads\/2022\/12\/Zwischenplatte-Mengenregler.jpg&#8221; alt=&#8221;Intermediate plate valve flow regulator hydraulics&#8221; title_text=&#8221;Intermediate plate flow regulator&#8221; align=&#8221;center&#8221; _builder_version=&#8221;4.19.4&#8243; _module_preset=&#8221;default&#8221; width=&#8221;50%&#8221; custom_margin=&#8221;||50px|||&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][et_pb_text _builder_version=&#8221;4.19.5&#8243; _module_preset=&#8221;default&#8221; header_6_font_size=&#8221;20px&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h6><b>Hydraulic valves in sandwich or disc design<\/b><\/h6>\n<p><span style=\"font-weight: 400;\">With this design of hydraulic valves, individual functions can be flexibly combined with each other. Each &#8220;slice&#8221; contains the corresponding functionality required for the various control circuits. The individual valve discs are mounted or braced with the aid of tie rods.<\/span><\/p>\n<p>[\/et_pb_text][et_pb_image src=&#8221;https:\/\/hytrade24.com\/hydraulikmagazin\/\/wp-content\/uploads\/2022\/12\/Plattenventil-sandwichbauweise.jpg&#8221; alt=&#8221;Sandwich type hydraulic valve&#8221; title_text=&#8221;Hydraulic valve sandwich design&#8221; align=&#8221;center&#8221; _builder_version=&#8221;4.19.4&#8243; _module_preset=&#8221;default&#8221; width=&#8221;50%&#8221; custom_margin=&#8221;||50px|||&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][et_pb_text _builder_version=&#8221;4.19.5&#8243; _module_preset=&#8221;default&#8221; header_6_font_size=&#8221;20px&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h6><b>Monobloc valves<\/b><\/h6>\n<p><span style=\"font-weight: 400;\">In this design, the functions of several control circuits are contained in one housing. The advantage over sandwich valves is the smaller number of sealing surfaces. In addition, there are no restrictions due to tie rod forces. As a rule, the production of monoblock valves only makes sense for larger quantities. However, there are many standard designs that are also available in small quantities.<\/span><\/p>\n<p>[\/et_pb_text][et_pb_image src=&#8221;https:\/\/hytrade24.com\/hydraulikmagazin\/\/wp-content\/uploads\/2022\/12\/Monoblockventil-hydraulik.jpg&#8221; alt=&#8221;Monobloc valve hydraulics&#8221; title_text=&#8221;Monobloc valve hydraulics&#8221; align=&#8221;center&#8221; _builder_version=&#8221;4.19.4&#8243; _module_preset=&#8221;default&#8221; width=&#8221;55%&#8221; custom_margin=&#8221;||50px|||&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][et_pb_text _builder_version=&#8221;4.19.5&#8243; _module_preset=&#8221;default&#8221; header_6_font_size=&#8221;20px&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h6><strong>What is the symbol of the hydraulic valve?<\/strong><\/h6>\n<p><span style=\"font-weight: 400;\">The circuit symbols for hydraulic components are standardized in DIN ISO 1219:2012. Some examples of hydraulic valves can be found in the table:<\/span><\/p>\n<p>&nbsp;<\/p>\n<p>[\/et_pb_text][dvmd_table_maker tbl_row_header_count=&#8221;0&#8243; tbl_image_ids=&#8221;426,429,428,427&#8243; tbl_tcell_cell_color=&#8221;RGBA(255,255,255,0)&#8221; tbl_chead_cell_color=&#8221;#e7007e&#8221; _builder_version=&#8221;4.19.4&#8243; _module_preset=&#8221;default&#8221; tbl_chead_text_text_color=&#8221;#FFFFFF&#8221; tbl_chead_text_font_size=&#8221;16px&#8221; border_color_all_tbl_tcell_cell_border=&#8221;#000000&#8243; box_shadow_style_tbl_tcell_cell_shadow=&#8221;preset1&#8243; box_shadow_vertical_tbl_tcell_cell_shadow=&#8221;1px&#8221; box_shadow_blur_tbl_tcell_cell_shadow=&#8221;8px&#8221; global_colors_info=&#8221;{}&#8221;][dvmd_table_maker_item col_content=&#8221;Ventilart<br \/>\nWegeventile<br \/>\nDruckbegrenzungsventile<br \/>\nStromregelventil<br \/>\nSperrventil&#8221; col_column_max_width=&#8221;1fr&#8221; col_tcell_cell_align_vert=&#8221;center&#8221; _builder_version=&#8221;4.19.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dvmd_table_maker_item][dvmd_table_maker_item col_content=&#8221;Funktion<br \/>\nDas Ventil in disem Beispiel besitzt 3 Schaltstellungen. In der Mittelstellung wird das Hydraulik\u00f6l direkt von der Hydraulikpumpe zur\u00fcck in den Tank gef\u00fchrt (%22druckloser Umlauf%22). Bei der linken Schaltstellung (parallel) wird das Druck\u00f6l zu Anschluss A gef\u00fchrt, der %22R\u00fccklauf%22 geht von Anschluss %22B%22 zur\u00fcck in den Tank. In der rechten Schaltstellung wird das Druck\u00f6l zu Anschluss B gef\u00fchrt, Anschluss A geht zur\u00fcck in den Tank. 4\/3 Wegeventile werden z.B. zu Steuerung von Hydraulikzylindern verwendet.<br \/>\nDruckbegrenzungsventile begrenzen den Betriebsdruck in der Hydraulikanlage oder den Arbeitsdruck von Verbrauchern. Das Ventil \u00f6ffnet, sobald der Betriebsdruck die Federkraft \u00fcbersteigt.<br \/>\nEin Stromregelventil steuert den Volumenstrom und dient damit zur Geschwinidigkeitsregelung von hydraulischen Verbrauchern wie z.B. Hydromotoren oder Hydrozylindern. Im Beispiel handelt es sich um ein 3-Wege-Stromregelventil. Die \u00d6lmenge wird von A nach B gereglt, das %22\u00fcbersch\u00fcssige%22 \u00d6l wird in den Tank gef\u00fchrt.<br \/>\nSperrventile sperren den Volumenstrom in eine Richtung. In die entgegengesetzte Richtung wird dieser frei gegeben. Im Beispiel ist ein hydraulisch entsperrbares R\u00fccklagventil dargestellt. Durchgang ist von A nach B, von B nach ist der Durchfluss gesperrt. Au\u00dfer die Steuerleitung (%22X%22 gestrichelt) wird mit \u00d6l beaufschlagt. Dann kann auch der Durchgang von B nach A erfolgen.&#8221; col_column_max_width=&#8221;2.2fr&#8221; col_tcell_cell_align_vert=&#8221;center&#8221; _builder_version=&#8221;4.19.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dvmd_table_maker_item][dvmd_table_maker_item col_content=&#8221;Schaltbild<br \/>\n<image>3<\/image><br \/>\n<image>2<\/image><br \/>\n<image>4<\/image><br \/>\n<image>1<\/image>&#8221; col_image_scale=&#8221;contain&#8221; _builder_version=&#8221;4.19.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dvmd_table_maker_item][\/dvmd_table_maker][et_pb_text _builder_version=&#8221;4.19.5&#8243; _module_preset=&#8221;default&#8221; header_6_font_size=&#8221;22px&#8221; custom_padding=&#8221;50px||||false|false&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h2>Hydraulic valves contributions<\/h2>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8221;4.19.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.19.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_blog fullwidth=&#8221;off&#8221; posts_number=&#8221;6&#8243; include_categories=&#8221;15&#8243; show_more=&#8221;on&#8221; show_date=&#8221;off&#8221; module_class=&#8221;blog&#8221; _builder_version=&#8221;4.19.5&#8243; _module_preset=&#8221;default&#8221; header_level=&#8221;h3&#8243; global_colors_info=&#8221;{}&#8221;][\/et_pb_blog][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.19.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What is the function of a hydraulic valve? Hydraulic valves are an important part of hydraulic systems and control or regulate the flow of hydraulic fluid (usually oil). Hydraulic valves control e.g. start, stop and direction as well as pressure or flow of the pressure medium delivered by a hydraulic pump. Valves are important components [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":522,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"difl_page_category":[],"class_list":["post-529","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/hytrade24.com\/hydraulikmagazin\/en\/wp-json\/wp\/v2\/pages\/529","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hytrade24.com\/hydraulikmagazin\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/hytrade24.com\/hydraulikmagazin\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/hytrade24.com\/hydraulikmagazin\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hytrade24.com\/hydraulikmagazin\/en\/wp-json\/wp\/v2\/comments?post=529"}],"version-history":[{"count":36,"href":"https:\/\/hytrade24.com\/hydraulikmagazin\/en\/wp-json\/wp\/v2\/pages\/529\/revisions"}],"predecessor-version":[{"id":1387,"href":"https:\/\/hytrade24.com\/hydraulikmagazin\/en\/wp-json\/wp\/v2\/pages\/529\/revisions\/1387"}],"up":[{"embeddable":true,"href":"https:\/\/hytrade24.com\/hydraulikmagazin\/en\/wp-json\/wp\/v2\/pages\/522"}],"wp:attachment":[{"href":"https:\/\/hytrade24.com\/hydraulikmagazin\/en\/wp-json\/wp\/v2\/media?parent=529"}],"wp:term":[{"taxonomy":"difl_page_category","embeddable":true,"href":"https:\/\/hytrade24.com\/hydraulikmagazin\/en\/wp-json\/wp\/v2\/difl_page_category?post=529"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}