{"id":4631,"date":"2026-04-29T07:01:46","date_gmt":"2026-04-29T07:01:46","guid":{"rendered":"https:\/\/hydrathpower.com\/?p=4631"},"modified":"2026-04-29T07:01:46","modified_gmt":"2026-04-29T07:01:46","slug":"comprensione-delle-valvole-di-controllo-della-pressione-idraulica-della-sequenza-di-riduzione-della-pressione-e-dello-scarico","status":"publish","type":"post","link":"https:\/\/hydrathpower.com\/it\/understanding-hydraulic-pressure-control-valves-relief-reducing-sequence-and-unloading\/","title":{"rendered":"Conoscere le valvole di controllo della pressione idraulica: Rilievo, riduzione, sequenza e scarico"},"content":{"rendered":"<h2>Cosa sono le valvole di controllo della pressione?<\/h2>\n<p>Le valvole di controllo della pressione sono presenti in quasi tutti i sistemi idraulici. Esse svolgono molteplici funzioni, dal mantenimento della pressione del sistema al di sotto di un limite superiore desiderato al mantenimento di una pressione fissa in determinate aree di un circuito fluido.<\/p>\n<div class=\"highlight-box\">\n<p>Gli standard industriali guidano le decisioni di progettazione idraulica. Secondo <a href=\"https:\/\/www.iso.org\/standard\/53564.html\" target=\"_blank\" rel=\"nofollow noopener\">ISO 4413:2010<\/a>, I progettisti devono considerare la pressione e la temperatura massime quando dimensionano i componenti. Ci\u00f2 garantisce un funzionamento sicuro e una lunga durata.<\/p>\n<figure id=\"attachment_4632\" aria-describedby=\"caption-attachment-4632\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img fetchpriority=\"high\" decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pressure-Control-Valves-300x256.jpg\" class=\"size-medium wp-image-4632 lazyload\" alt=\"Valvole di controllo della pressione\" width=\"300\" height=\"256\"><figcaption id=\"caption-attachment-4632\" class=\"wp-caption-text\"><noscript><img decoding=\"async\" class=\"size-medium wp-image-4632\" src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pressure-Control-Valves-300x256.jpg\" alt=\"Valvole di controllo della pressione\" width=\"300\" height=\"256\" srcset=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pressure-Control-Valves-300x256.jpg 300w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pressure-Control-Valves-1024x872.jpg 1024w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pressure-Control-Valves-768x654.jpg 768w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pressure-Control-Valves-14x12.jpg 14w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pressure-Control-Valves.jpg 1027w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/noscript> Valvole di controllo della pressione<\/figcaption><\/figure>\n<\/div>\n<p>Le valvole pi\u00f9 comuni per il controllo della pressione sono le seguenti:<\/p>\n<ul>\n<li><strong>Valvole di sicurezza<\/strong><\/li>\n<li><strong>Valvole di riduzione<\/strong><\/li>\n<li><strong>Valvole di sequenza<\/strong><\/li>\n<li><strong>Valvole di controbilanciamento<\/strong><\/li>\n<li><strong>Valvole di scarico<\/strong><\/li>\n<\/ul>\n<h2>Valvole di sicurezza<\/h2>\n<p>La maggior parte dei sistemi di potenza fluida sono progettati per funzionare entro un intervallo di pressione prestabilito. Se non si controllano o si limitano queste forze, i componenti dei sistemi di alimentazione a fluido possono essere danneggiati.<\/p>\n<h3>Valvole di sfioro ad azione diretta<\/h3>\n<p>Le valvole ad azione diretta possono essere costituite da una molla o da una sfera, con un lato esposto alla pressione del sistema e l'altro contrastato da una forza elastica predefinita. Quando la pressione del sistema inizia a superare l'impostazione della molla della valvola, il fluido solleva la sfera o l'otturatore, consentendo a una quantit\u00e0 controllata di liquido di passare al serbatoio e mantenere la pressione del sistema.<\/p>\n<figure id=\"attachment_4633\" aria-describedby=\"caption-attachment-4633\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Direct-Acting-Relief-Valves-300x202.jpg\" class=\"size-medium wp-image-4633 lazyload\" alt=\"Valvole di sfioro ad azione diretta\" width=\"300\" height=\"202\"><figcaption id=\"caption-attachment-4633\" class=\"wp-caption-text\"><noscript><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-4633\" src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Direct-Acting-Relief-Valves-300x202.jpg\" alt=\"Valvole di sfioro ad azione diretta\" width=\"300\" height=\"202\" srcset=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Direct-Acting-Relief-Valves-300x202.jpg 300w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Direct-Acting-Relief-Valves-768x518.jpg 768w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Direct-Acting-Relief-Valves-18x12.jpg 18w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Direct-Acting-Relief-Valves.jpg 869w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/noscript> Valvole di sfioro ad azione diretta<\/figcaption><\/figure>\n<h3>Valvole di sfioro pilotate<\/h3>\n<p>Per le applicazioni che richiedono un rilascio di grande portata con un minimo differenziale di pressione, si utilizzano in genere valvole di sicurezza pilotate. Queste valvole funzionano in due fasi:<\/p>\n<ol>\n<li>Lo stadio pilota \u00e8 costituito da una piccola valvola di sicurezza a molla (di solito incorporata nella valvola di sicurezza principale).<\/li>\n<li>Il pilota agisce come un grilletto per controllare la valvola di sicurezza principale.<\/li>\n<\/ol>\n<p>Poich\u00e9 queste valvole non iniziano ad aprirsi fino a quando il sistema non raggiunge 90% della pressione massima, l'efficienza del sistema \u00e8 protetta perch\u00e9 viene bypassata una quantit\u00e0 minore di olio.<\/p>\n<figure id=\"attachment_4634\" aria-describedby=\"caption-attachment-4634\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pilot-Operated-Relief-Valves-300x202.jpg\" class=\"size-medium wp-image-4634 lazyload\" alt=\"Valvole di sfioro pilotate\" width=\"300\" height=\"202\"><figcaption id=\"caption-attachment-4634\" class=\"wp-caption-text\"><noscript><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-4634\" src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pilot-Operated-Relief-Valves-300x202.jpg\" alt=\"Valvole di sfioro pilotate\" width=\"300\" height=\"202\" srcset=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pilot-Operated-Relief-Valves-300x202.jpg 300w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pilot-Operated-Relief-Valves-768x518.jpg 768w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pilot-Operated-Relief-Valves-18x12.jpg 18w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pilot-Operated-Relief-Valves.jpg 869w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/noscript> Valvole di sfioro pilotate<\/figcaption><\/figure>\n<h2>Valvole di riduzione<\/h2>\n<p>Il componente pi\u00f9 pratico per il mantenimento delle pressioni secondarie e inferiori in un sistema idraulico \u00e8 il <a href=\"\/hydraulic-pressure-reducing-valve\/\">valvola riduttrice<\/a>. Le valvole riduttrici sono valvole a due vie normalmente aperte che si chiudono quando vengono sottoposte alla pressione a valle impostata.<\/p>\n<figure id=\"attachment_4635\" aria-describedby=\"caption-attachment-4635\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Reducing-Valves-300x202.jpg\" class=\"size-medium wp-image-4635 lazyload\" alt=\"Valvole di riduzione\" width=\"300\" height=\"202\"><figcaption id=\"caption-attachment-4635\" class=\"wp-caption-text\"><noscript><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-4635\" src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Reducing-Valves-300x202.jpg\" alt=\"Valvole di riduzione\" width=\"300\" height=\"202\" srcset=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Reducing-Valves-300x202.jpg 300w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Reducing-Valves-768x518.jpg 768w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Reducing-Valves-18x12.jpg 18w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Reducing-Valves.jpg 869w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/noscript> Valvole di riduzione<\/figcaption><\/figure>\n<h3>Valvole riduttrici ad azione diretta<\/h3>\n<p>Una valvola riduttrice ad azione diretta limita la pressione massima disponibile in un circuito secondario, indipendentemente dalle variazioni di pressione del circuito principale. Il segnale di rilevamento della pressione proviene dal lato a valle.<\/p>\n<h3>Valvole riduttrici pilotate<\/h3>\n<p>Nelle valvole riduttrici pilotate, il cursore \u00e8 bilanciato idraulicamente dalla pressione a valle su entrambe le estremit\u00e0. Una leggera molla mantiene la valvola aperta.<\/p>\n<figure id=\"attachment_4636\" aria-describedby=\"caption-attachment-4636\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pilot-Operated-Reducing-Valves-300x202.jpg\" class=\"size-medium wp-image-4636 lazyload\" alt=\"Valvole riduttrici pilotate\" width=\"300\" height=\"202\"><figcaption id=\"caption-attachment-4636\" class=\"wp-caption-text\"><noscript><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-4636\" src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pilot-Operated-Reducing-Valves-300x202.jpg\" alt=\"Valvole riduttrici pilotate\" width=\"300\" height=\"202\" srcset=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pilot-Operated-Reducing-Valves-300x202.jpg 300w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pilot-Operated-Reducing-Valves-768x518.jpg 768w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pilot-Operated-Reducing-Valves-18x12.jpg 18w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pilot-Operated-Reducing-Valves.jpg 869w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/noscript> Valvole riduttrici pilotate<\/figcaption><\/figure>\n<h2>Valvole di sequenza<\/h2>\n<p>Nei circuiti con attuatori multipli, spesso gli attuatori devono essere pilotati in una sequenza definita. Le valvole di sequenza regolano l'ordine in cui si svolgono le varie funzioni.<\/p>\n<p>Le valvole di sequenza sono valvole a due vie normalmente chiuse. Sono simili alle valvole di sicurezza ad azione diretta, ma la camera della molla \u00e8 in genere ventilata esternamente al serbatoio.<\/p>\n<figure id=\"attachment_4637\" aria-describedby=\"caption-attachment-4637\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Sequence-Valves-300x202.jpg\" class=\"size-medium wp-image-4637 lazyload\" alt=\"Valvole di sequenza\" width=\"300\" height=\"202\"><figcaption id=\"caption-attachment-4637\" class=\"wp-caption-text\"><noscript><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-4637\" src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Sequence-Valves-300x202.jpg\" alt=\"Valvole di sequenza\" width=\"300\" height=\"202\" srcset=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Sequence-Valves-300x202.jpg 300w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Sequence-Valves-768x518.jpg 768w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Sequence-Valves-18x12.jpg 18w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Sequence-Valves.jpg 869w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/noscript> Valvole di sequenza<\/figcaption><\/figure>\n<h2>Valvole di controbilanciamento<\/h2>\n<p>Queste valvole normalmente chiuse mantengono principalmente una pressione fissa in una sezione del circuito, in genere per contrastare il peso o le forze esterne.<\/p>\n<p>L'attacco principale si collega all'estremit\u00e0 dello stelo del cilindro, mentre l'attacco secondario si collega alla valvola di controllo direzionale.<\/p>\n<figure id=\"attachment_4638\" aria-describedby=\"caption-attachment-4638\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Counterbalance-Valves-300x202.jpg\" class=\"size-medium wp-image-4638 lazyload\" alt=\"Valvole di controbilanciamento\" width=\"300\" height=\"202\"><figcaption id=\"caption-attachment-4638\" class=\"wp-caption-text\"><noscript><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-4638\" src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Counterbalance-Valves-300x202.jpg\" alt=\"Valvole di controbilanciamento\" width=\"300\" height=\"202\" srcset=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Counterbalance-Valves-300x202.jpg 300w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Counterbalance-Valves-768x518.jpg 768w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Counterbalance-Valves-18x12.jpg 18w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Counterbalance-Valves.jpg 869w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/noscript> Valvole di controbilanciamento<\/figcaption><\/figure>\n<h2>Valvole di scarico<\/h2>\n<p>Queste valvole sono tipicamente utilizzate per lo scarico delle pompe. Quando viene raggiunta la pressione del sistema, dirigono il flusso in uscita dalla pompa direttamente verso la pompa. <a href=\"\/hydraulic-tank\/\">serbatoio<\/a> a bassa pressione.<\/p>\n<figure id=\"attachment_4639\" aria-describedby=\"caption-attachment-4639\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Unloading-Valves-300x202.jpg\" class=\"size-medium wp-image-4639 lazyload\" alt=\"Valvole di scarico\" width=\"300\" height=\"202\"><figcaption id=\"caption-attachment-4639\" class=\"wp-caption-text\"><noscript><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-4639\" src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Unloading-Valves-300x202.jpg\" alt=\"Valvole di scarico\" width=\"300\" height=\"202\" srcset=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Unloading-Valves-300x202.jpg 300w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Unloading-Valves-768x518.jpg 768w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Unloading-Valves-18x12.jpg 18w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Unloading-Valves.jpg 869w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/noscript> Valvole di scarico<\/figcaption><\/figure>\n<figure id=\"attachment_4640\" aria-describedby=\"caption-attachment-4640\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pilot-Operated-Unloading-Valves-300x202.jpg\" class=\"size-medium wp-image-4640 lazyload\" alt=\"Valvole di scarico pilotate\" width=\"300\" height=\"202\"><figcaption id=\"caption-attachment-4640\" class=\"wp-caption-text\"><noscript><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-4640\" src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pilot-Operated-Unloading-Valves-300x202.jpg\" alt=\"Valvole di scarico pilotate\" width=\"300\" height=\"202\" srcset=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pilot-Operated-Unloading-Valves-300x202.jpg 300w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pilot-Operated-Unloading-Valves-768x518.jpg 768w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pilot-Operated-Unloading-Valves-18x12.jpg 18w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/04\/Pilot-Operated-Unloading-Valves.jpg 869w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/noscript> Valvole di scarico pilotate<\/figcaption><\/figure>\n<h3>Circuiti alto-basso<\/h3>\n<p>I circuiti che utilizzano due pompe per l'azionamento e la velocit\u00e0 (clampaggio) si affidano a valvole di scarico per migliorare l'efficienza.<\/p>\n<h2>Valvole di controllo della pressione a confronto<\/h2>\n<table>\n<thead>\n<tr>\n<th>Tipo di valvola<\/th>\n<th>Funzione primaria<\/th>\n<th>Stato normale<\/th>\n<th>Posizione di rilevamento<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Valvola di sicurezza<\/td>\n<td>Limitare la pressione massima del sistema<\/td>\n<td>Normalmente chiuso<\/td>\n<td>Pressione di ingresso<\/td>\n<\/tr>\n<tr>\n<td>Valvola di riduzione<\/td>\n<td>Mantenere la pressione secondaria inferiore<\/td>\n<td>Normalmente aperto<\/td>\n<td>Pressione a valle<\/td>\n<\/tr>\n<tr>\n<td>Valvola di sequenza<\/td>\n<td>Sequenza degli attuatori di controllo<\/td>\n<td>Normalmente chiuso<\/td>\n<td>Pressione a monte<\/td>\n<\/tr>\n<tr>\n<td>Valvola di controbilanciamento<\/td>\n<td>Contrastare il peso del carico<\/td>\n<td>Normalmente chiuso<\/td>\n<td>Pilota interno<\/td>\n<\/tr>\n<tr>\n<td>Valvola di scarico<\/td>\n<td>Reindirizzare il flusso della pompa al serbatoio<\/td>\n<td>Caricato a molla<\/td>\n<td>Pilota esterno<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Come scegliere la giusta valvola di controllo della pressione<\/h2>\n<div class=\"valve-card\">\n<ol>\n<li><strong>\u00c8 necessaria una protezione del sistema?<\/strong> Utilizzare una valvola di sicurezza<\/li>\n<li><strong>\u00c8 necessario abbassare la pressione secondaria?<\/strong> Utilizzare una valvola riduttrice<\/li>\n<li><strong>Attuatori multipli che richiedono una sequenza?<\/strong> Utilizzare valvole di sequenza<\/li>\n<li><strong>Prevenire la caduta libera del carico?<\/strong> Utilizzare valvole di controbilanciamento<\/li>\n<li><strong>Scarico della pompa per l'efficienza?<\/strong> Utilizzare valvole di scarico<\/li>\n<\/ol>\n<\/div>\n<h2>Domande frequenti<\/h2>\n<div class=\"faq-item\">\n<p><strong>D: Qual \u00e8 la differenza tra una valvola di sicurezza e una valvola riduttrice?<\/strong>R: Le valvole di sicurezza limitano la pressione massima del sistema aprendosi quando la pressione supera il valore impostato. Le valvole riduttrici mantengono una pressione secondaria inferiore indipendentemente dalla pressione a monte.<\/p>\n<\/div>\n<div class=\"faq-item\">\n<p><strong>D: Quando \u00e8 necessario utilizzare valvole pilotate invece di valvole ad azione diretta?<\/strong>R: Le valvole pilotate sono ideali per le applicazioni ad alta portata e alta pressione, dove \u00e8 importante ridurre al minimo il differenziale di pressione.<\/p>\n<\/div>\n<div class=\"faq-item\">\n<p><strong>D: Che cos'\u00e8 l'overshoot di pressione nelle valvole di sicurezza?<\/strong>R: L'overshoot di pressione \u00e8 la differenza tra la pressione di cracking e la pressione di pieno flusso.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>What are Pressure Control Valves? Pressure control valves are found in nearly all hydraulic systems. They assist in multiple functions, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4632,"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-4631","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Understanding Hydraulic Pressure Control Valves: Relief, Reducing, Sequence, and Unloading - Hydrath Power<\/title>\n<meta name=\"description\" content=\"Learn how pressure control valves manage hydraulic system pressure. Understand relief valves, reducing valves, sequence valves, and unloading valves with practical diagrams and selection tips.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hydrathpower.com\/it\/comprensione-delle-valvole-di-controllo-della-pressione-idraulica-della-sequenza-di-riduzione-della-pressione-e-dello-scarico\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Understanding Hydraulic Pressure Control Valves: Relief, Reducing, Sequence, and Unloading - Hydrath Power\" \/>\n<meta property=\"og:description\" content=\"Learn how pressure control valves manage hydraulic system pressure. 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