Familles communes :<\/p>\n
- \n
- Pompes<\/a>Le cercle avec la fl\u00e8che vers l'ext\u00e9rieur ; la fl\u00e8che inclin\u00e9e indique un d\u00e9placement variable ; les deux fl\u00e8ches indiquent un d\u00e9placement bidirectionnel.
\n\n\t\t\t \n\t\t\t\t![\"Symboles](\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2025\/11\/Hydraulic-Hand-Pump-Symbols.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tSymboles des pompes \u00e0 main hydrauliques\n\t\t\t\t<\/figcaption><\/figure> \n\t\t\t \n\t\t\t\t![\"Symbole](\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2025\/11\/Unidirectional-fixed-displacement-hydraulic-pump-symbol.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tSymbole de la pompe hydraulique unidirectionnelle \u00e0 cylindr\u00e9e fixe\n\t\t\t\t<\/figcaption><\/figure> \n\t\t\t \n\t\t\t\t![\"Symbole](\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2025\/11\/Bidirectional-fixed-displacement-hydraulic-pump-symbol.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tSymbole de la pompe hydraulique bidirectionnelle \u00e0 cylindr\u00e9e fixe\n\t\t\t\t<\/figcaption><\/figure> \n\t\t\t \n\t\t\t\t![\"Symbole](\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2025\/11\/Unidirectional-variable-displacement-hydraulic-pump-symbol.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tSymbole de la pompe hydraulique unidirectionnelle \u00e0 cylindr\u00e9e variable\n\t\t\t\t<\/figcaption><\/figure> \n\t\t\t \n\t\t\t\t![\"Symbole](\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2025\/11\/Bidirectional-variable-displacement-hydraulic-pump-symbol.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tSymbole de la pompe hydraulique bidirectionnelle \u00e0 cylindr\u00e9e variable\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n<\/li>\n - Moteurs<\/a>cercle avec fl\u00e8che vers l'int\u00e9rieur ; la ligne variable indique un d\u00e9placement r\u00e9glable ; bidirectionnel avec double fl\u00e8che.
\n\n\t\t\t \n\t\t\t\t![\"Symbole](\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2025\/11\/Electric-motor-symbol.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tSymbole du moteur \u00e9lectrique\n\t\t\t\t<\/figcaption><\/figure> \n\t\t\t \n\t\t\t\t![\"Symbole](\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2025\/11\/Internal-Combustion-Engine-motor-symbol.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tSymbole du moteur \u00e0 combustion interne\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n<\/li>\n - Cylindres<\/a>Le syst\u00e8me d'alimentation en eau potable : rectangle avec piston et tige ; simple effet ou double effet en fonction de la disposition des orifices et des ressorts.
\n\n\t\t\t \n\t\t\t\t![\"Symboles](\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2025\/11\/Hydraulic-Cylinder-Symbols.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tSymboles des v\u00e9rins hydrauliques\n\t\t\t\t<\/figcaption><\/figure> \n\t\t\t \n\t\t\t\t![\"Cylindre](\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2025\/11\/Double-acting-cylinder.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tCylindre \u00e0 double effet\n\t\t\t\t<\/figcaption><\/figure> \n\t\t\t \n\t\t\t\t![\"V\u00e9rin](\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2025\/11\/Single-acting-Cylinder-with-Spring-Symbol.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tV\u00e9rin \u00e0 simple effet avec symbole de ressort\n\t\t\t\t<\/figcaption><\/figure> \n\t\t\t \n\t\t\t\t![\"V\u00e9rin](\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2025\/11\/Double-acting-Cylinder-with-a-Double-Rod.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tV\u00e9rin \u00e0 double effet avec double tige\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n<\/li>\n - Vannes<\/a>Les \u00e9l\u00e9ments suivants sont repr\u00e9sent\u00e9s : bo\u00eetes par position, orifices par canaux ; actionnement par ressorts, sol\u00e9no\u00efdes, leviers ; les fl\u00e8ches internes indiquent le d\u00e9bit.
\n\n\t\t\t \n\t\t\t\t![\"Contr\u00f4le](\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2025\/11\/Hydraulic-Flow-Control-Variable-Two-way-Valve.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tContr\u00f4le du d\u00e9bit hydraulique Valve \u00e0 deux voies variable\n\t\t\t\t<\/figcaption><\/figure> \n\t\t\t \n\t\t\t\t![\"R\u00e9gulateur](\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2025\/11\/Three-way-Hydraulic-Compensated-Flow-Regulator-Valve.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tR\u00e9gulateur de d\u00e9bit hydraulique compens\u00e9 \u00e0 trois voies\n\t\t\t\t<\/figcaption><\/figure> \n\t\t\t \n\t\t\t\t![\"Clapet](\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2025\/11\/Hydraulic-Calibrated-Check-Valve.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tClapet anti-retour hydraulique calibr\u00e9\n\t\t\t\t<\/figcaption><\/figure> \n\t\t\t \n\t\t\t\t![\"Clapet](\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2025\/11\/Hydraulic-check-valve-without-spring-symbol.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tClapet anti-retour hydraulique sans symbole de ressort\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n<\/li>\n - Lignes et raccordements : lignes pleines de pression\/travail, lignes pointill\u00e9es de pilotage, lignes fines ou pointill\u00e9es de drainage ; les jonctions et croisements utilisent des marques distinctes.
\n\n\t\t\t \n\t\t\t\t![\"Symbole](\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2025\/11\/Mainline-symbol.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tSymbole de la ligne principale\n\t\t\t\t<\/figcaption><\/figure> \n\t\t\t \n\t\t\t\t![\"Symboles](\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2025\/11\/Pilot-Line-symbols.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tSymboles de la ligne pilote\n\t\t\t\t<\/figcaption><\/figure> \n\t\t\t \n\t\t\t\t![\"Symboles](\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2025\/11\/Crossing-Line-symbols.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tSymboles de la ligne de croisement\n\t\t\t\t<\/figcaption><\/figure> \n\t\t\t \n\t\t\t\t![\"Symboles](\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2025\/11\/Drain-Line-Symbols.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tSymboles de la ligne de vidange\n\t\t\t\t<\/figcaption><\/figure> \n\t\t\t \n\t\t\t\t![\"Symboles](\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2025\/11\/Flexible-Hose-Line-Pipe-Symbols.jpg\")
<\/a>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\tSymboles de tuyaux flexibles\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n<\/li>\n - P (pression), T (r\u00e9servoir\/retour), A\/B (actionneur) : P (pression), T (r\u00e9servoir\/retour), A\/B (actionneur), X (alimentation du pilote), Y (vidange du pilote).<\/li>\n<\/ul>\n
Comment lire un sch\u00e9ma hydraulique<\/h3>\n
- \n
- Trouver la pompe : identifier la source d'alimentation et le sens de sortie.<\/li>\n
- Trace de P : suivre la conduite de pression jusqu'\u00e0 la soupape de s\u00e9curit\u00e9 et au primaire. vannes directionnelles<\/a>.<\/li>\n
- D\u00e9coder la valve : compter les positions et les orifices, noter l'actionnement et l'\u00e9tat du centre.<\/li>\n
- Identifier l'actionneur : v\u00e9rins ou moteurs sur A\/B ; confirmer la diff\u00e9rence entre v\u00e9rins simples et v\u00e9rins doubles. double effet<\/a>.<\/li>\n
- V\u00e9rifier les retours et les vidanges : Conduites en T et tous les tuyaux d'\u00e9vacuation externes en Y.<\/li>\n
- Commande du pilote d'examen : lignes X\/Y en pointill\u00e9s pour la commande \u00e0 distance ou \u00e9lectro-hydraulique.<\/li>\n
- V\u00e9rifier la protection : d\u00e9charge, contr\u00f4le, contr\u00f4le du d\u00e9bit et filtres ; s'assurer que ISO 4413<\/a> les fonctions de s\u00e9curit\u00e9.<\/li>\n<\/ol>\n
Notes sur les symboles ISO et ANSI<\/h3>\n
- \n
- Les symboles sont largement similaires ; les r\u00e9gions de projet diff\u00e8rent en ce qui concerne les valeurs par d\u00e9faut et les habitudes de dessin.<\/li>\n
- Pour les travaux globaux, fournir une l\u00e9gende avec les lettres de port et les types de lignes ; \u00e9viter les croisements ambigus.<\/li>\n<\/ul>\n
Tableau rapide : types de lignes et ports<\/h3>\n
- \n
- Ligne continue : travail\/pression<\/li>\n
- Ligne en pointill\u00e9 : contr\u00f4le du pilote<\/li>\n
- Ligne fine\/pointill\u00e9e : \u00e9coulement ou fuite<\/li>\n
- P : pression de la pompe ; T : r\u00e9servoir\/retour ; A\/B : actionneur ; X : alimentation du pilote ; Y : vidange du pilote<\/li>\n<\/ul>\n
Avantages et pi\u00e8ges courants<\/h3>\n
- \n
- Avantages : communication pr\u00e9cise, d\u00e9pannage plus rapide, examens plus faciles entre les \u00e9quipes.<\/li>\n
- Pi\u00e8ges : m\u00e9langer les normes, mal interpr\u00e9ter les positions centrales, ignorer les drains externes et les lignes pilotes.<\/li>\n<\/ul>\n
Recommandation : conserver une l\u00e9gende des symboles sur chaque sch\u00e9ma et faire correspondre les symboles des vannes aux fiches techniques.<\/p>\n
Questions fr\u00e9quemment pos\u00e9es<\/h3>\n
- \n
- Que signifient P et T ?
\nP est la pression de la pompe, T est le r\u00e9servoir\/retour au r\u00e9servoir. Sur une vanne directionnelle, P alimente la vanne, T prend le d\u00e9bit de retour.<\/li>\n - Combien de positions de soupape ai-je ?
\nComptez les cases. Une vanne 4\/3 a quatre orifices et trois positions ; la condition centrale d\u00e9finit le comportement neutre.<\/li>\n - Que repr\u00e9sentent X et Y sur une vanne ?
\nX est la pression d'alimentation du pilote, Y est la pression de vidange du pilote. Le pilote externe am\u00e9liore la stabilit\u00e9 avec certains collecteurs.<\/li>\n - Comment distinguer un cylindre \u00e0 simple effet d'un cylindre \u00e0 double effet ?
\nLes orifices indiquent qu'un c\u00f4t\u00e9 ou les deux c\u00f4t\u00e9s sont sous pression ; les ressorts ou le retour par gravit\u00e9 marquent le simple effet.<\/li>\n - Quelle est la ligne pilote ?
\nLes lignes en pointill\u00e9 indiquent les circuits de commande des pilotes ; utiliser des drains s\u00e9par\u00e9s s'ils sont marqu\u00e9s Y.<\/li>\n<\/ul>\n<\/code><\/pre>","protected":false},"excerpt":{"rendered":"What are hydraulic symbols? Hydraulic symbols are standardized graphics defined in ISO 1219\u20111 that describe component functions and circuit logic. […]<\/p>\n","protected":false},"author":1,"featured_media":4247,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4383","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"\n
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- Que signifient P et T ?
- Moteurs<\/a>cercle avec fl\u00e8che vers l'int\u00e9rieur ; la ligne variable indique un d\u00e9placement r\u00e9glable ; bidirectionnel avec double fl\u00e8che.