{"id":3859,"date":"2025-10-17T09:30:16","date_gmt":"2025-10-17T01:30:16","guid":{"rendered":"https:\/\/ballvalves.tw\/?post_type=product&#038;p=3859"},"modified":"2026-07-17T08:47:40","modified_gmt":"2026-07-17T00:47:40","slug":"impugnatura-a-gradini","status":"publish","type":"product","link":"https:\/\/ballvalves.tw\/it\/product\/graduated-handle\/","title":{"rendered":"Manopola graduata per valvola a sfera \u2014 Controllo manuale della portata da 0 a 90\u00b0"},"content":{"rendered":"<h2>Descrizione del prodotto<\/h2>\n<p>A standard ball valve is built for all-or-nothing flow. Fit this <strong>impugnatura a gradini<\/strong> and it becomes a simple <strong>manual flow control ball valve<\/strong>: a scale plate marked from 0\u00b0 to 90\u00b0 in 10\u00b0 increments sits under the handle, and a locking pin secures the handle at the notch you choose \u2014 30\u00b0, 50\u00b0, or any other step.<\/p>\n<p>For simple throttling jobs, this is a far cheaper route than an automated control valve \u2014 one 304 stainless steel accessory instead of an actuator, positioner, and wiring.<\/p>\n<h2>How the Locking Pin Works<\/h2>\n<ul>\n<li><strong>Set:<\/strong> turn the handle to the angle you need and secure the locking pin in the matching notch on the graduated plate.<\/li>\n<li><strong>Hold:<\/strong> with the pin engaged, the handle resists pipeline vibration and flow-induced movement in normal service \u2014 changing the position takes a deliberate release of the pin.<\/li>\n<li><strong>Repeat:<\/strong> operators can note a setting (&#8220;notch 3&#8221;) and return the valve to exactly the same flow after maintenance or flushing.<\/li>\n<\/ul>\n<h2>Specifiche tecniche principali<\/h2>\n<table style=\"width:100%;border-collapse:collapse\">\n<tbody>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;text-align:left;width:38%\">Materiale<\/th>\n<td style=\"border:1px solid #ddd;padding:8px\">ASTM 304 stainless steel<\/td>\n<\/tr>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;text-align:left\">Scale<\/th>\n<td style=\"border:1px solid #ddd;padding:8px\">0\u00b0 \u2013 90\u00b0, in 10\u00b0 increments<\/td>\n<\/tr>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;text-align:left\">Mechanism<\/th>\n<td style=\"border:1px solid #ddd;padding:8px\">Locking pin on a graduated plate<\/td>\n<\/tr>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;text-align:left\">Fits<\/th>\n<td style=\"border:1px solid #ddd;padding:8px\">Our ball valve series \u2014 tell us your valve model when ordering<\/td>\n<\/tr>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;text-align:left\">SKU<\/th>\n<td style=\"border:1px solid #ddd;padding:8px\">HG-304<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Ball Valve + Graduated Handle vs. Control Valve<\/h2>\n<p>This handle suits <strong>manual balancing<\/strong>: jobs where someone sets a flow rate once and the system holds it. If your process needs continuous automatic adjustment, that is control-valve territory \u2014 but for filling, cooling, or mixing lines that just need a repeatable setting, the graduated handle does the job at a fraction of the cost.<\/p>\n<h2>Dove viene utilizzato<\/h2>\n<ul>\n<li><strong>HVAC balancing<\/strong> \u2014 regulating hot and cold water flow to coils.<\/li>\n<li><strong>Mixing lines<\/strong> \u2014 manually setting the ratio between two fluids.<\/li>\n<li><strong>Process control<\/strong> \u2014 holding a constant flow rate for filling or cooling.<\/li>\n<\/ul>\n<h2>Which Handle Do You Need?<\/h2>\n<table style=\"width:100%;border-collapse:collapse\">\n<thead>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;text-align:left\">Manico<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;text-align:left\">Pick it when<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px\"><strong>Graduated handle (this page)<\/strong><\/td>\n<td style=\"border:1px solid #ddd;padding:8px\">You need to throttle flow and lock the valve at a repeatable position.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px\"><a href=\"https:\/\/ballvalves.tw\/it\/prodotto\/maniglia-con-chiusura\/\">Lockable handle<\/a><\/td>\n<td style=\"border:1px solid #ddd;padding:8px\">The valve must be padlocked for lockout\/tagout.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px\"><a href=\"https:\/\/ballvalves.tw\/it\/prodotto\/maniglia-ovale-rivestita-in-vinile-per-valvole-a-sfera-in-acciaio-inossidabile-304\/\">Oval handle<\/a><\/td>\n<td style=\"border:1px solid #ddd;padding:8px\">You want a comfortable, glove-friendly grip for frequent operation, or a replacement handle.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px\"><a href=\"https:\/\/ballvalves.tw\/it\/prodotto\/manico-allungato\/\">Manico allungato<\/a><\/td>\n<td style=\"border:1px solid #ddd;padding:8px\">The valve sits on insulated pipe and the grip has to clear the insulation.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px\"><a href=\"https:\/\/ballvalves.tw\/it\/prodotto\/manico-a-farfalla\/\">Butterfly handle<\/a><\/td>\n<td style=\"border:1px solid #ddd;padding:8px\">You prefer a compact stainless T-shaped grip.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Domande frequenti<\/h2>\n<h3>Una valvola a sfera pu\u00f2 davvero essere utilizzata per il controllo della portata?<\/h3>\n<p>Per una semplice regolazione manuale della portata, s\u00ec. La piastra graduata consente di impostare un\u2019apertura parziale e di bloccarla con il perno di bloccaggio. Per i processi che richiedono una regolazione continua e automatica, \u00e8 consigliabile utilizzare una valvola di controllo dedicata: questa manopola rappresenta la soluzione economica per le applicazioni \u201cimposta e mantieni\u201d.<\/p>\n<h3>Quali sono gli incrementi della scala?<\/h3>\n<p>The plate is marked from 0\u00b0 to 90\u00b0 in 10\u00b0 increments, so the valve locks at any of the ten positions.<\/p>\n<h3>Su quali valvole \u00e8 compatibile?<\/h3>\n<p>Our own ball valve series. The handle is made to match our valve stems, so we do not guarantee fit on other brands&#8217; valves \u2014 include your valve model when ordering.<\/p>\n<h3>\u00c8 la stessa cosa di un \u201cmemory stop\u201d?<\/h3>\n<p>It covers the same need and more. A memory stop limits the handle to one preset position; the graduated handle locks at any 10\u00b0 step and lets you return to a recorded setting whenever you want.<\/p>\n<h3>Le vibrazioni potrebbero modificare la posizione della valvola?<\/h3>\n<p>Il perno di bloccaggio fissa la maniglia nell'incavo della piastra, in modo che il dispositivo resista alle vibrazioni della conduttura e alla pressione di flusso durante il normale funzionamento. Per modificarne la posizione, l'operatore deve sbloccare intenzionalmente il perno.<\/p>\n<h3>Come posso conoscere il prezzo?<\/h3>\n<p>Indicateci la quantit\u00e0 e il modello della valvola a cui \u00e8 destinata la manopola. Rispondiamo a ogni richiesta entro 24 ore.<\/p>\n<p><a href=\"https:\/\/ballvalves.tw\/it\/contatto\/\" style=\"display:inline-block;background:#c62828;color:#ffffff !important;font-size:16px;font-weight:700;padding:14px 26px;border-radius:6px;text-decoration:none\">Richiedi un preventivo \u2014 risposta entro 24 ore \u2192<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Acciaio inossidabile 304 <strong>impugnatura a gradini<\/strong> that turns a standard on\/off ball valve into a <strong>manual flow control valve<\/strong> \u2014 set the opening anywhere from 0\u00b0 to 90\u00b0 in 10\u00b0 steps and secure it with the locking pin.<\/p>\n<p><strong>Fits our own ball valve series<\/strong> \u2014 tell us your valve model when ordering.<\/p>\n<p>ISO 9001 \u00b7 CE \u00b7 Produttore dal 1999<\/p>\n<p><a href=\"https:\/\/ballvalves.tw\/it\/contatto\/\" style=\"display:inline-block;background:#c62828;color:#ffffff !important;font-size:16px;font-weight:700;padding:14px 26px;border-radius:6px;text-decoration:none\">Richiedi un preventivo \u2014 risposta entro 24 ore \u2192<\/a><\/p>","protected":false},"featured_media":4003,"template":"","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-4)","background-image":"","background-repeat":"repeat","background-position":"center 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