{"id":5058,"date":"2026-04-30T09:44:44","date_gmt":"2026-04-30T09:44:44","guid":{"rendered":"https:\/\/bbpmfg.com\/?page_id=5058"},"modified":"2026-04-30T09:46:33","modified_gmt":"2026-04-30T09:46:33","slug":"specific-speed-calculator","status":"publish","type":"page","link":"https:\/\/bbpmfg.com\/pt\/irrigation-pumps\/specific-speed-calculator\/","title":{"rendered":"calculadora de velocidade espec\u00edfica"},"content":{"rendered":"<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-635b94f\" data-block-id=\"635b94f\"><style>.stk-635b94f {margin-bottom:0px !important;}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-635b94f-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-00aa628\" data-v=\"4\" data-block-id=\"00aa628\"><style>.stk-00aa628-container{margin-top:var(--stk--preset--spacing--50, 1.5rem) !important;margin-right:var(--stk--preset--spacing--50, 1.5rem) !important;margin-bottom:var(--stk--preset--spacing--50, 1.5rem) !important;margin-left:var(--stk--preset--spacing--50, 1.5rem) !important;}<\/style><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-00aa628-container stk--no-background stk--no-padding\"><div class=\"has-text-align-center stk-block-content stk-inner-blocks stk-00aa628-inner-blocks\"><div class=\"ct-breadcrumbs\" data-source=\"rankmath\" ><nav aria-label=\"p\u00e3o ralado\" class=\"rank-math-breadcrumb\"><p><span class=\"last\">Casa<\/span><\/p><\/nav><\/div><\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-74a7619\" data-block-id=\"74a7619\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-74a7619-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-81226dd\" data-v=\"4\" data-block-id=\"81226dd\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-81226dd-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-81226dd-inner-blocks\">\n<!-- BBP Specific Speed Calculator \u2014 Tool 3 -->\n<!-- WordPress Gutenberg Custom HTML compatible -->\n\n<style>\n.bbpSS-wrap{max-width:680px;margin:24px auto;padding:24px;background:#f5f7fa;border-radius:8px;border-top:4px solid #1848C0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica,Arial,sans-serif;color:#1a2332}\n.bbpSS-wrap h1{margin:0 0 8px;font-size:1.3em;color:#1848C0}\n.bbpSS-wrap p.bbpSS-lead{margin:0 0 18px;color:#6b7280;font-size:.95em;line-height:1.5}\n.bbpSS-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:12px}\n.bbpSS-row label{display:block;font-size:.9em;font-weight:600;margin-bottom:6px;color:#1a2332}\n.bbpSS-row input,.bbpSS-row select{width:100%;padding:10px 12px;border:1px solid #d0d5dc;border-radius:6px;font-size:1em;background:#fff;box-sizing:border-box}\n.bbpSS-row input:focus,.bbpSS-row select:focus{outline:none;border-color:#1848C0;box-shadow:0 0 0 3px rgba(24,72,192,.15)}\n.bbpSS-btn{display:block;width:100%;padding:12px 20px;background:#F0C018;color:#1a1a1a;border:none;border-radius:6px;font-weight:700;font-size:1.05em;cursor:pointer;margin-top:8px;transition:transform .15s}\n.bbpSS-btn:hover{transform:translateY(-1px)}\n.bbpSS-result{margin-top:18px;padding:18px 22px;background:#fff;border-left:4px solid #1848C0;border-radius:0 6px 6px 0;display:none}\n.bbpSS-result.bbpSS-show{display:block}\n.bbpSS-result h4{margin:0 0 10px;color:#1848C0;font-size:1.05em}\n.bbpSS-result p{margin:0 0 6px;font-size:.95em;line-height:1.5}\n.bbpSS-result strong{color:#1a2332}\n.bbpSS-cta{display:inline-block;margin-top:12px;padding:8px 16px;background:#1848C0;color:#fff;border-radius:5px;text-decoration:none;font-size:.92em;font-weight:600}\n.bbpSS-note{margin-top:14px;font-size:.82em;color:#6b7280;line-height:1.45}\n<\/style>\n\n<div class=\"bbpSS-wrap\">\n<h1>Velocidade Espec\u00edfica (n<sub>s<\/sub>) Calculadora<\/h1>\n<p class=\"bbpSS-lead\">Velocidade espec\u00edfica \u00e9 o \u00edndice que decide se voc\u00ea precisa de uma bomba centr\u00edfuga radial, de fluxo misto ou de fluxo axial Insira a velocidade de rota\u00e7\u00e3o, o fluxo BEP e a cabe\u00e7a por est\u00e1gio; a calculadora retorna n<sub>s<\/sub> nas conven\u00e7\u00f5es m\u00e9tricas e dos EUA e mapeia-o para a linha de produtos BBP.<\/p>\n\n<div class=\"bbpSS-row\">\n<div>\n<label for=\"bbpSS-rpm\">Velocidade de Rota\u00e7\u00e3o (RPM)<\/label>\n<input type=\"number\" id=\"bbpSS-rpm\" value=\"1450\" min=\"100\" placeholder=\"por exemplo, 1450\">\n<\/div>\n<div>\n<label for=\"bbpSS-flow\">Taxa de fluxo BEP<\/label>\n<input type=\"number\" id=\"bbpSS-flow\" value=\"500\" min=\"1\" placeholder=\"por exemplo, 500\">\n<\/div>\n<\/div>\n\n<div class=\"bbpSS-row\">\n<div>\n<label for=\"bbpSS-flowUnit\">Unidade Fluxo<\/label>\n<select id=\"bbpSS-flowUnit\">\n<option value=\"gpm\">GPM<\/option>\n<option value=\"m3s\">m\u00b3\/s<\/option>\n<option value=\"m3h\">m\u00b3\/h<\/option>\n<\/select>\n<\/div>\n<div>\n<label for=\"bbpSS-head\">Cabe\u00e7a por est\u00e1gio<\/label>\n<input type=\"number\" id=\"bbpSS-head\" value=\"20\" min=\"0.1\" step=\"0.1\" placeholder=\"por exemplo, 20\">\n<\/div>\n<\/div>\n\n<div class=\"bbpSS-row\">\n<div>\n<label for=\"bbpSS-headUnit\">Unidade Chefe<\/label>\n<select id=\"bbpSS-headUnit\">\n<option value=\"ft\">p\u00e9s<\/option>\n<option value=\"m\" selected>m<\/option>\n<\/select>\n<\/div>\n<div>\n<label for=\"bbpSS-suction\">Suc\u00e7\u00e3o Impulsor<\/label>\n<select id=\"bbpSS-suction\">\n<option value=\"single\" selected>Suc\u00e7\u00e3o \u00fanica<\/option>\n<option value=\"double\">Suc\u00e7\u00e3o dupla<\/option>\n<\/select>\n<\/div>\n<\/div>\n\n<button type=\"button\" class=\"bbpSS-btn\" onclick=\"bbpSS_calc()\">Calcular Velocidade Espec\u00edfica<\/button>\n\n<div id=\"bbpSS-result\" class=\"bbpSS-result\">\n<h4>Resultado Espec\u00edfico de Velocidade<\/h4>\n<p id=\"bbpSS-resultNs\"><\/p>\n<p id=\"bbpSS-resultNus\"><\/p>\n<p id=\"bbpSS-resultClass\"><\/p>\n<p id=\"bbpSS-resultBBP\"><\/p>\n<a href=\"#ct-popup-820\" class=\"bbpSS-cta\">Confirme a Sele\u00e7\u00e3o com BBP Engineering<\/a>\n<\/div>\n\n<p class=\"bbpSS-note\">Refer\u00eancia da f\u00f3rmula: N<sub>s<\/sub> = n \u00b7 Q<sup>0.5<\/sup> \/H<sup>0.75<\/sup> (EUA) e n<sub>s<\/sub> = n \u00b7 Q<sup>0.5<\/sup> \/H<sup>0.75<\/sup> (m\u00e9trica).Fator de convers\u00e3o 51,6 (51,6 \u00b7 n<sub>s<\/sub> =N<sub>s<\/sub>). Por ANSI\/HI 14.1, o fluxo do impulsor de dupla suc\u00e7\u00e3o \u00e9 reduzido pela metade quando a velocidade espec\u00edfica. Instituto Hidr\u00e1ulico de refer\u00eancia: radial 1035 (m\u00e9trico) 5001,800 (US) fluxo misto 3 160 \/1.800 8.000; fluxo axial 16.000 \/8.000 20.000.<\/p>\n<\/div>\n\n<script>\nfunction bbpSS_calc(){\n  var rpm=parseFloat(document.getElementById(\"bbpSS-rpm\").value);\n  var flowVal=parseFloat(document.getElementById(\"bbpSS-flow\").value);\n  var flowUnit=document.getElementById(\"bbpSS-flowUnit\").value;\n  var headVal=parseFloat(document.getElementById(\"bbpSS-head\").value);\n  var headUnit=document.getElementById(\"bbpSS-headUnit\").value;\n  var suction=document.getElementById(\"bbpSS-suction\").value;\n  if(isNaN(rpm) || isNaN(flowVal) || isNaN(headVal) || rpm<=0 || flowVal<=0 || headVal<=0){\n    alert(\"Please enter positive values for RPM, flow, and head.\");\n    return;\n  }\n  var qGpm,qM3s,qPerImpeller;\n  if(flowUnit===\"gpm\"){\n    qGpm=flowVal;\n    qM3s=flowVal\/15850.32;\n  } else if(flowUnit===\"m3s\"){\n    qM3s=flowVal;\n    qGpm=flowVal*15850.32;\n  } else {\n    qM3s=flowVal\/3600;\n    qGpm=flowVal*4.4029;\n  }\n  if(suction===\"double\"){\n    qGpm=qGpm\/2;\n    qM3s=qM3s\/2;\n  }\n  var hM,hFt;\n  if(headUnit===\"m\"){\n    hM=headVal;\n    hFt=headVal*3.281;\n  } else {\n    hFt=headVal;\n    hM=headVal*0.3048;\n  }\n  var Nus=rpm*Math.sqrt(qGpm)\/Math.pow(hFt,0.75);\n  var ns=rpm*Math.sqrt(qM3s)\/Math.pow(hM,0.75);\n  var className,classDesc,bbpRec,bbpUrl;\n  if(ns < 35){\n    className=\"Radial Centrifugal\";\n    classDesc=\"Best for low flow, high head. Closed radial impeller geometry.\";\n    bbpRec=\"BBP Q-Series Agricultural Centrifugal\";\n    bbpUrl=\"https:\/\/bbpmfg.com\/irrigation-pumps\/agriculture-pump\/\";\n  } else if(ns < 160){\n    className=\"Mixed Flow\";\n    classDesc=\"Semi-axial impeller. Best for high flow at moderate head, with stable power curve.\";\n    bbpRec=\"BBP Mixed Flow Series (BBP-MFH)\";\n    bbpUrl=\"https:\/\/bbpmfg.com\/irrigation-pumps\/mixed-flow-pump\/\";\n  } else if(ns < 400){\n    className=\"Axial Flow Propeller\";\n    classDesc=\"Axial impeller. Best for very high flow at low head; cooling water and large-volume canal lift.\";\n    bbpRec=\"BBP Axial Flow AHW Series\";\n    bbpUrl=\"https:\/\/bbpmfg.com\/irrigation-pumps\/axial-flow-pump\/\";\n  } else {\n    className=\"Beyond axial-flow envelope\";\n    classDesc=\"Specific speed above 400 metric is unusual. Application engineering review recommended.\";\n    bbpRec=\"Custom AHW-H or specialty design\";\n    bbpUrl=\"https:\/\/bbpmfg.com\/irrigation-pumps\/axial-flow-pump\/\";\n  }\n  document.getElementById(\"bbpSS-resultNs\").innerHTML=\"<strong>n<sub>s<\/sub> (metric):<\/strong> \"+ns.toFixed(1);\n  document.getElementById(\"bbpSS-resultNus\").innerHTML=\"<strong>N<sub>s<\/sub> (US):<\/strong> \"+Math.round(Nus).toLocaleString();\n  document.getElementById(\"bbpSS-resultClass\").innerHTML=\"<strong>Pump class:<\/strong> \"+className+\" \u2014 \"+classDesc;\n  document.getElementById(\"bbpSS-resultBBP\").innerHTML=\"<strong>BBP recommendation:<\/strong> \"+bbpRec;\n  document.getElementById(\"bbpSS-result\").classList.add(\"bbpSS-show\");\n}\n<\/script>\n\n<\/div><\/div><\/div>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Specific Speed (ns) Calculator Specific speed is the index that decides whether you need a radial centrifugal, mixed-flow, or axial-flow pump. Enter the rotational speed, BEP flow, and head per stage; the calculator returns ns in both metric and US conventions and maps it to the BBP product line. Rotational Speed (RPM) BEP Flow Rate [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":2753,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_gspb_post_css":"","footnotes":""},"class_list":["post-5058","page","type-page","status-publish","hentry"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/bbpmfg.com\/pt\/wp-json\/wp\/v2\/pages\/5058","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bbpmfg.com\/pt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/bbpmfg.com\/pt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/bbpmfg.com\/pt\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/bbpmfg.com\/pt\/wp-json\/wp\/v2\/comments?post=5058"}],"version-history":[{"count":0,"href":"https:\/\/bbpmfg.com\/pt\/wp-json\/wp\/v2\/pages\/5058\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/bbpmfg.com\/pt\/wp-json\/wp\/v2\/pages\/2753"}],"wp:attachment":[{"href":"https:\/\/bbpmfg.com\/pt\/wp-json\/wp\/v2\/media?parent=5058"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}