{"id":6258,"date":"2026-01-27T01:42:10","date_gmt":"2026-01-26T17:42:10","guid":{"rendered":"https:\/\/www.onerovalve.com\/?p=6258"},"modified":"2026-02-03T08:52:41","modified_gmt":"2026-02-03T00:52:41","slug":"ball-valve-torque-calculation-actuator-sizing","status":"publish","type":"post","link":"https:\/\/www.onerovalve.com\/it\/blog\/ball-valve-torque-calculation-actuator-sizing\/","title":{"rendered":"Valvola a sfera flottante vs valvola a sfera Trunnion: guida alla coppia e all&#039;attuatore"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Nel settore del controllo dei fluidi, la scelta della corretta architettura delle valvole \u00e8 il primo passo verso un sistema durevole. Per molti ingegneri, il dibattito si concentra spesso su: <a href=\"https:\/\/www.onerovalve.com\/it\/blog\/comparison\/floating-ball-valve-vs-trunnion-8-difference-you-need-to-know\/\">valvola a sfera galleggiante vs valvola a sfera a perno<\/a>. Entrambi i modelli hanno lo stesso scopo di base. Tuttavia, gestiscono le sollecitazioni meccaniche in modo diverso, il che influisce sulla forza necessaria per ruotare la valvola.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Comprendere le differenze meccaniche \u00e8 fondamentale per l&#039;automazione. Questa guida esplora le configurazioni &quot;flottante&quot; e &quot;a perno&quot; e il loro impatto sul calcolo della coppia e sul dimensionamento dell&#039;attuatore.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"571\" src=\"https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/02\/image-1770053755168-139.webp\" alt=\"\" class=\"wp-image-6259\" srcset=\"https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/02\/image-1770053755168-139.webp 1024w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/02\/image-1770053755168-139-500x279.webp 500w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/02\/image-1770053755168-139-300x167.webp 300w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/02\/image-1770053755168-139-768x428.webp 768w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/02\/image-1770053755168-139-18x10.webp 18w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/02\/image-1770053755168-139-135x75.webp 135w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/02\/image-1770053755168-139-480x268.webp 480w, https:\/\/www.onerovalve.com\/wp-content\/uploads\/2026\/02\/image-1770053755168-139-800x446.webp 800w\" sizes=\"auto, (max-width:767px) 480px, (max-width:1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Valvola a sfera galleggiante vs valvola a sfera Trunnion<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La differenza principale tra una valvola a perno e una valvola a sfera flottante \u00e8 il modo in cui la sfera \u00e8 supportata all&#039;interno del corpo.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Comprensione di una valvola a sfera galleggiante<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Una valvola a sfera flottante non ha un sistema di ancoraggio meccanico. Si affida interamente alla pressione del fluido per premere la sfera contro la sede a valle, garantendo una tenuta stagna. In breve, la sfera &quot;galleggia&quot; tra due sedi valvola. Le valvole a sfera flottante sono pi\u00f9 semplici, il che le rende convenienti e adatte ad applicazioni a media pressione.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Comprensione di una valvola a sfera Trunnion<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Una valvola a sfera trunnion presenta una sfera ancorata meccanicamente da un albero (trunnion) sia in alto che in basso. Questo impedisce alla sfera di muoversi all&#039;interno del corpo valvola, rendendole ideali per la gestione di applicazioni ad alta pressione. Inoltre, riduce al minimo i requisiti di coppia, rendendo le valvole a sfera trunnion pi\u00f9 facili da azionare sia manualmente che automaticamente.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Valvola a sfera Trunnion vs valvola a sfera flottante: una tabella comparativa<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Caratteristiche<\/td><td>Valvola a sfera galleggiante<\/td><td>Valvola a sfera Trunnion<\/td><\/tr><tr><td>Progetto<\/td><td>Semplice palla galleggiante<\/td><td>Ancorato con supporto a perno<\/td><\/tr><tr><td>Gestione della pressione<\/td><td>Medio&nbsp;<\/td><td>Alto<\/td><\/tr><tr><td>Esigenze di coppia<\/td><td>Pi\u00f9 alto<\/td><td>Inferiore<\/td><\/tr><tr><td>Le migliori applicazioni<\/td><td>Sistemi a media pressione<\/td><td>Sistemi ad alta pressione o di grandi dimensioni<\/td><\/tr><tr><td>Costo<\/td><td>Conveniente<\/td><td>Costoso<\/td><\/tr><tr><td>Gamma di dimensioni<\/td><td>1-6 pollici<\/td><td>6-48+ pollici<\/td><\/tr><tr><td>Intervallo di pressione&nbsp;<\/td><td>150-1.480 PSI<\/td><td>150-6.000+ PSI<\/td><\/tr><tr><td>Intervallo di temperatura<\/td><td>da -20\u00b0F a 800\u00b0F<\/td><td>da -20\u00b0F a 800\u00b0F<\/td><\/tr><tr><td>Coppia a 600 PSI<\/td><td>300% aumento da bassa pressione<\/td><td>Coerente in tutta la gamma di pressione<\/td><\/tr><tr><td>Ciclo di vita<\/td><td>Oltre 10.000 operazioni<\/td><td>Oltre 25.000 operazioni<\/td><\/tr><tr><td>Classe di perdita<\/td><td>Classe IV-V<\/td><td>Classe VI<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Importanza della coppia nelle valvole&nbsp;<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La coppia \u00e8 la forza di rotazione necessaria per ruotare la sfera. In una valvola a sfera manuale, l&#039;operatore fornisce questa forza manualmente. Invece, nei sistemi automatizzati, come <a href=\"https:\/\/www.onerovalve.com\/it\/blog\/electric-actuated-ball-valve-guide\/\">valvole a sfera azionate elettricamente<\/a>, un motore o un cilindro pneumatico fornisce la forza.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La coppia richiesta \u00e8 molto pi\u00f9 elevata in una valvola a sfera flottante rispetto a una valvola a sfera con perno quando la pressione aumenta.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In una valvola flottante, la pressione della tubazione spinge la sfera nella sede a valle, aumentando l&#039;attrito e la coppia necessaria per ruotarla. Al contrario, una valvola a perno utilizza cuscinetti e un perno a perno per supportare la sfera. Questo assorbe la pressione, riduce al minimo l&#039;attrito nella sede e mantiene bassa la coppia richiesta, anche ad alte pressioni.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Fattori chiave per il calcolo della coppia<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Per calcolare in modo appropriato la coppia di una valvola, gli ingegneri prendono in considerazione diversi fattori:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Coppia di apertura: la forza necessaria per iniziare a muovere la sfera da una posizione completamente chiusa.<\/li>\n<\/ol>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>Coppia di rotazione: la forza necessaria per far s\u00ec che la palla continui a muoversi durante la curva di 90 gradi.<\/li>\n<\/ol>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>Coppia di chiusura: la forza necessaria per \u201cchiudere\u201d la sfera.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Per una valvola a sfera manuale, i produttori solitamente forniscono una tabella di coppia basata sulla pressione differenziale. Tuttavia, per i sistemi automatizzati, \u00e8 necessario aggiungere un fattore di sicurezza o di servizio. Questo di solito \u00e8 pari a 25% - 50% in pi\u00f9 rispetto alla coppia di base per garantire che l&#039;attuatore possa gestire attriti imprevisti causati da detriti o guarnizioni asciutte.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Dimensionamento e selezione dell&#039;attuatore<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Una volta calcolata la coppia, si pu\u00f2 procedere al dimensionamento dell&#039;attuatore. Le scelte pi\u00f9 comuni includono valvole a sfera ad azionamento pneumatico, idraulico o elettrico.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Valvole a sfera azionate elettricamente<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sono molto diffusi in luoghi remoti dove l&#039;aria compressa non \u00e8 disponibile. Utilizzano un motore e un riduttore per ruotare la valvola. Quando si dimensiona un attuatore elettrico, assicurarsi sempre che la coppia di funzionamento e di stallo del motore superi la coppia massima richiesta dalla valvola.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Considerazioni sulla valvola a sfera manuale<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Per una valvola a sfera manuale, il dimensionamento dipende dalla lunghezza della maniglia o dal rapporto di trasmissione del volantino. Se la coppia \u00e8 troppo elevata per consentire a una persona di ruotare agevolmente, viene aggiunto un riduttore per ridurre lo sforzo aggiuntivo.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Conclusione<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La scelta tra una valvola a sfera flottante e una valvola a sfera trunnion dipende in larga misura dai requisiti di pressione e dalle esigenze di automazione. Le valvole flottanti sono convenienti per i sistemi a bassa pressione, ma costose da automatizzare per dimensioni maggiori. Le valvole a sfera trunnion offrono un&#039;alternativa robusta, utilizzando supporti fissi per ridurre l&#039;attrito e semplificare il dimensionamento dell&#039;attuatore.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Calcolando correttamente la coppia e comprendendo le differenze meccaniche sopra discusse, \u00e8 possibile garantire un sistema di controllo del flusso efficiente e duraturo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Onero Valve produce valvole conformi a <a href=\"https:\/\/www.onerovalve.com\/it\/quality\/\">Standard API 607 e ISO 9001<\/a>, compresi entrambi <a href=\"https:\/\/www.onerovalve.com\/it\/product\/floating-ball-valve\/\">valvola a sfera galleggiante<\/a> E <a href=\"https:\/\/www.onerovalve.com\/it\/product\/trunnion-ball-valve\/\">valvola a sfera a trunnion<\/a> opzioni. Garantiamo che ogni valvola venga testata per specifiche di coppia precise, rendendo il dimensionamento dell&#039;attuatore pi\u00f9 semplice e meno dispendioso in termini di tempo per i nostri clienti.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Che abbiate bisogno di una valvola a sfera manuale standard o di una soluzione completamente automatizzata, Onero Valve ha le competenze ingegneristiche necessarie per supportare la vostra infrastruttura. Scoprite di pi\u00f9 sulle nostre competenze tecniche sul nostro sito web.<\/p>\n\n\n\n<style>\n  \/* Onero Custom CTA Card - Narrower Version *\/\n  .cta-banner-card {\n    position: relative;\n    \/* \u5e03\u5c40\u4e0e\u5c3a\u5bf8\u8c03\u6574 *\/\n    display: block;\n    margin: 40px auto; \n    width: 95%; \n    max-width: 750px; \/* \u3010\u4fee\u6539\u70b9\u3011\u5bbd\u5ea6\u53d8\u7a84\uff0c\u4ece850px\u6539\u4e3a750px *\/\n    height: 280px;    \/* \u3010\u4fdd\u6301\u4e0d\u53d8\u3011\u9ad8\u5ea6\u4fdd\u6301280px *\/\n    \n    border-radius: 12px;\n    overflow: hidden; \n    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\n    box-shadow: 0 4px 15px rgba(0,0,0,0.1);\n    cursor: pointer;\n    text-align: center;\n    background-color: #000;\n    text-decoration: none; \n  }\n  \n  \/* \u80cc\u666f\u56fe\u7247\u5c42 *\/\n  .cta-banner-bg {\n    width: 100%;\n    height: 100%;\n    \/* \u80cc\u666f\u56fe *\/\n    background-image: url('https:\/\/www.onerovalve.com\/wp-content\/uploads\/2024\/08\/B-34-1-2.jpg');\n    background-size: cover;\n    background-position: center;\n    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94); \n  }\n\n  \/* \u60ac\u505c\u4ea4\u4e92\uff1a\u80cc\u666f\u653e\u5927 *\/\n  .cta-banner-card:hover .cta-banner-bg {\n    transform: scale(1.08);\n  }\n\n  \/* \u906e\u7f69\u5c42 & \u5185\u5bb9\u5e03\u5c40 *\/\n  .cta-banner-overlay {\n    position: absolute;\n    top: 0;\n    left: 0;\n    width: 100%;\n    height: 100%;\n    background: rgba(0, 0, 0, 0.6); \n    \n    display: flex;\n    flex-direction: column;\n    justify-content: center;\n    align-items: center;\n    padding: 0 20px;\n  }\n\n  .cta-banner-content {\n    width: 100%;\n    max-width: 600px; \/* \u5185\u5bb9\u533a\u57df\u4e5f\u76f8\u5e94\u5fae\u8c03 *\/\n    z-index: 2;\n    text-align: center;\n  }\n\n  .cta-banner-title {\n    color: #ffffff;\n    font-size: 32px;\n    font-weight: 700;\n    margin-bottom: 12px;\n    line-height: 1.2;\n    text-shadow: 0 2px 8px rgba(0,0,0,0.7);\n  }\n\n  .cta-banner-desc {\n    color: #f0f0f0;\n    font-size: 16px;\n    margin-bottom: 24px;\n    line-height: 1.5;\n    font-weight: 400;\n  }\n\n  \/* \u84dd\u8272\u6309\u94ae\u6837\u5f0f *\/\n  .cta-banner-btn {\n    display: inline-block;\n    padding: 12px 30px;\n    background-color: #083e89; \n    color: #ffffff !important; \n    font-size: 16px;\n    font-weight: bold;\n    text-decoration: none !important;\n    border-radius: 6px;\n    transition: all 0.3s ease;\n    border: 1px solid #083e89;\n  }\n\n  \/* \u6309\u94ae\u60ac\u505c\u6837\u5f0f *\/\n  .cta-banner-btn:hover {\n    background-color: #062e63; \n    border-color: #062e63;\n    transform: translateY(-2px);\n    box-shadow: 0 4px 12px rgba(0,0,0,0.3);\n  }\n\n  \/* \u79fb\u52a8\u7aef\u9002\u914d *\/\n  @media (max-width: 767px) {\n    .cta-banner-card {\n      height: 300px; \/* \u79fb\u52a8\u7aef\u9ad8\u5ea6\u4fdd\u6301\u539f\u6709\u9002\u914d\u903b\u8f91 *\/\n    }\n    .cta-banner-title {\n      font-size: 24px;\n    }\n    .cta-banner-desc {\n      font-size: 14px;\n    }\n  }\n<\/style>\n\n<div class=\"cta-banner-card\">\n  <div class=\"cta-banner-bg\"><\/div>\n  \n  <div class=\"cta-banner-overlay\">\n    <div class=\"cta-banner-content\">\n      <div class=\"cta-banner-title\">Standard di produzione avanzati<\/div>\n      <p class=\"cta-banner-desc\">Scoprite i nostri rigorosi controlli di qualit\u00e0 e gli impianti di produzione all&#039;avanguardia, progettati per soddisfare la domanda energetica globale.<\/p>\n      <a href=\"https:\/\/www.onerovalve.com\/it\/manufacturing\/\" class=\"cta-banner-btn\" target=\"_blank\">Visualizza il processo di produzione<\/a>\n    <\/div>\n  <\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>In the fluid control industry, choosing the correct valve architecture is the primary step toward a durable system. For many engineers, the debate often centers on<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":6259,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-6258","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Automation Guide: Floating vs Trunnion Ball Valve Selection<\/title>\n<meta name=\"description\" content=\"High torque costs money. Learn why the choice between a floating ball valve vs trunnion ball valve is critical for cost-effective automation and pressure handling.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.onerovalve.com\/it\/blog\/ball-valve-torque-calculation-actuator-sizing\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Automation Guide: Floating vs Trunnion Ball Valve Selection\" \/>\n<meta property=\"og:description\" content=\"High torque costs money. 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