{"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\/ar\/irrigation-pumps\/specific-speed-calculator\/","title":{"rendered":"\u062d\u0627\u0633\u0628\u0629 \u0627\u0644\u0633\u0631\u0639\u0629 \u0627\u0644\u0645\u062d\u062f\u062f\u0629"},"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=\"\u0641\u062a\u0627\u062a \u0627\u0644\u062e\u0628\u0632\" class=\"rank-math-breadcrumb\"><p><span class=\"last\">\u0628\u064a\u062a<\/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>\u0627\u0644\u0633\u0631\u0639\u0629 \u0627\u0644\u0645\u062d\u062f\u062f\u0629 (\u0646<sub>s<\/sub>) \u0622\u0644\u0629 \u062d\u0627\u0633\u0628\u0629<\/h1>\n<p class=\"bbpSS-lead\">\u0627\u0644\u0633\u0631\u0639\u0629 \u0627\u0644\u0645\u062d\u062f\u062f\u0629 \u0647\u064a \u0627\u0644\u0645\u0624\u0634\u0631 \u0627\u0644\u0630\u064a \u064a\u0642\u0631\u0631 \u0645\u0627 \u0625\u0630\u0627 \u0643\u0646\u062a \u0628\u062d\u0627\u062c\u0629 \u0625\u0644\u0649 \u0645\u0636\u062e\u0629 \u0637\u0631\u062f \u0645\u0631\u0643\u0632\u064a \u0634\u0639\u0627\u0639\u064a\u060c \u0623\u0648 \u062a\u062f\u0641\u0642 \u0645\u062e\u062a\u0644\u0637\u060c \u0623\u0648 \u062a\u062f\u0641\u0642 \u0645\u062d\u0648\u0631\u064a. \u0623\u062f\u062e\u0644 \u0633\u0631\u0639\u0629 \u0627\u0644\u062f\u0648\u0631\u0627\u0646 \u0648\u062a\u062f\u0641\u0642 BEP \u0648\u0627\u0644\u0631\u0623\u0633 \u0644\u0643\u0644 \u0645\u0631\u062d\u0644\u0629\u061b \u062a\u0631\u062c\u0639 \u0627\u0644\u0622\u0644\u0629 \u0627\u0644\u062d\u0627\u0633\u0628\u0629 n<sub>s<\/sub> \u0641\u064a \u0643\u0644 \u0645\u0646 \u0627\u0644\u0627\u062a\u0641\u0627\u0642\u064a\u0627\u062a \u0627\u0644\u0645\u062a\u0631\u064a\u0629 \u0648\u0627\u0644\u0648\u0644\u0627\u064a\u0627\u062a \u0627\u0644\u0645\u062a\u062d\u062f\u0629 \u0648\u062a\u0639\u064a\u064a\u0646\u0647 \u0625\u0644\u0649 \u062e\u0637 \u0625\u0646\u062a\u0627\u062c BBP.<\/p>\n\n<div class=\"bbpSS-row\">\n<div>\n<label for=\"bbpSS-rpm\">\u0633\u0631\u0639\u0629 \u0627\u0644\u062f\u0648\u0631\u0627\u0646 (RPM)<\/label>\n<input type=\"number\" id=\"bbpSS-rpm\" value=\"1450\" min=\"100\" placeholder=\"\u0639\u0644\u0649 \u0633\u0628\u064a\u0644 \u0627\u0644\u0645\u062b\u0627\u0644 1450\">\n<\/div>\n<div>\n<label for=\"bbpSS-flow\">\u0645\u0639\u062f\u0644 \u062a\u062f\u0641\u0642 BEP<\/label>\n<input type=\"number\" id=\"bbpSS-flow\" value=\"500\" min=\"1\" placeholder=\"\u0639\u0644\u0649 \u0633\u0628\u064a\u0644 \u0627\u0644\u0645\u062b\u0627\u0644 500\">\n<\/div>\n<\/div>\n\n<div class=\"bbpSS-row\">\n<div>\n<label for=\"bbpSS-flowUnit\">\u0648\u062d\u062f\u0629 \u0627\u0644\u062a\u062f\u0641\u0642<\/label>\n<select id=\"bbpSS-flowUnit\">\n<option value=\"gpm\">\u062c\u064a \u0628\u064a \u0625\u0645<\/option>\n<option value=\"m3s\">\u0645\u00b3\/\u062b<\/option>\n<option value=\"m3h\">\u0645\u00b3\/\u0633\u0627\u0639\u0629<\/option>\n<\/select>\n<\/div>\n<div>\n<label for=\"bbpSS-head\">\u0631\u0623\u0633 \u0644\u0643\u0644 \u0645\u0631\u062d\u0644\u0629<\/label>\n<input type=\"number\" id=\"bbpSS-head\" value=\"20\" min=\"0.1\" step=\"0.1\" placeholder=\"\u0639\u0644\u0649 \u0633\u0628\u064a\u0644 \u0627\u0644\u0645\u062b\u0627\u0644 20\">\n<\/div>\n<\/div>\n\n<div class=\"bbpSS-row\">\n<div>\n<label for=\"bbpSS-headUnit\">\u0648\u062d\u062f\u0629 \u0627\u0644\u0631\u0623\u0633<\/label>\n<select id=\"bbpSS-headUnit\">\n<option value=\"ft\">\u0642\u062f\u0645<\/option>\n<option value=\"m\" selected>m<\/option>\n<\/select>\n<\/div>\n<div>\n<label for=\"bbpSS-suction\">\u0634\u0641\u0637 \u0627\u0644\u0645\u0643\u0631\u0647<\/label>\n<select id=\"bbpSS-suction\">\n<option value=\"single\" selected>\u0634\u0641\u0637 \u0648\u0627\u062d\u062f<\/option>\n<option value=\"double\">\u0634\u0641\u0637 \u0645\u0632\u062f\u0648\u062c<\/option>\n<\/select>\n<\/div>\n<\/div>\n\n<button type=\"button\" class=\"bbpSS-btn\" onclick=\"bbpSS_calc()\">\u062d\u0633\u0627\u0628 \u0633\u0631\u0639\u0629 \u0645\u062d\u062f\u062f\u0629<\/button>\n\n<div id=\"bbpSS-result\" class=\"bbpSS-result\">\n<h4>\u0646\u062a\u064a\u062c\u0629 \u0633\u0631\u0639\u0629 \u0645\u062d\u062f\u062f\u0629<\/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\">\u062a\u0623\u0643\u064a\u062f \u0627\u0644\u0627\u062e\u062a\u064a\u0627\u0631 \u0628\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0647\u0646\u062f\u0633\u0629 BBP<\/a>\n<\/div>\n\n<p class=\"bbpSS-note\">\u0645\u0631\u062c\u0639 \u0627\u0644\u0635\u064a\u063a\u0629: \u0646<sub>s<\/sub> = \u0646 \u00b7 \u0633<sup>0.5<\/sup> \/\u062d<sup>0.75<\/sup> (\u0627\u0644\u0648\u0644\u0627\u064a\u0627\u062a \u0627\u0644\u0645\u062a\u062d\u062f\u0629) \u0648\u0646<sub>s<\/sub> = \u0646 \u00b7 \u0633<sup>0.5<\/sup> \/\u062d<sup>0.75<\/sup> (\u0645\u062a\u0631\u064a). \u0639\u0627\u0645\u0644 \u0627\u0644\u062a\u062d\u0648\u064a\u0644 51.6 (51.6 \u00b7 \u0646<sub>s<\/sub> = \u0646<sub>s<\/sub>). \u0644\u0643\u0644 ANSI\/HI 14.1\u060c \u064a\u0646\u062e\u0641\u0636 \u062a\u062f\u0641\u0642 \u0627\u0644\u0645\u0643\u0631\u0647 \u0645\u0632\u062f\u0648\u062c \u0627\u0644\u0634\u0641\u0637 \u0625\u0644\u0649 \u0627\u0644\u0646\u0635\u0641 \u0639\u0646\u062f \u062d\u0633\u0627\u0628 \u0633\u0631\u0639\u0629 \u0645\u062d\u062f\u062f\u0629. \u0627\u0644\u0646\u0637\u0627\u0642\u0627\u062a \u0627\u0644\u0645\u0631\u062c\u0639\u064a\u0629 \u0644\u0644\u0645\u0639\u0647\u062f \u0627\u0644\u0647\u064a\u062f\u0631\u0648\u0644\u064a\u0643\u064a: \u0634\u0639\u0627\u0639\u064a 10 \u064835 (\u0645\u062a\u0631\u064a) \/500 \u0645\u062a\u0631 1800 (\u0627\u0644\u0648\u0644\u0627\u064a\u0627\u062a \u0627\u0644\u0645\u062a\u062d\u062f\u0629)\u061b \u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u0645\u062e\u062a\u0644\u0637 35 \u0646\u0633\u0631 160\/1800 \u0646\u0633\u0631 8000\u061b \u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u0645\u062d\u0648\u0631\u064a 160.400\/8.000 \u0646\u0633\u0631 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\/ar\/wp-json\/wp\/v2\/pages\/5058","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bbpmfg.com\/ar\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/bbpmfg.com\/ar\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/bbpmfg.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/bbpmfg.com\/ar\/wp-json\/wp\/v2\/comments?post=5058"}],"version-history":[{"count":0,"href":"https:\/\/bbpmfg.com\/ar\/wp-json\/wp\/v2\/pages\/5058\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/bbpmfg.com\/ar\/wp-json\/wp\/v2\/pages\/2753"}],"wp:attachment":[{"href":"https:\/\/bbpmfg.com\/ar\/wp-json\/wp\/v2\/media?parent=5058"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}