[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-651134-105":59,"doc-detail-651134-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","bearings-in-centrifugal-pumps-application-handbook","Bearings in centrifugal pumps - Application handbook","","Application handbook focused on bearings and related components used with SKF centrifugal pumps, offering design and selection guidance. It explains fundamentals of centrifugal pump operation, including energy conversion, pump classifications, hydraulic performance described by specific speed, and typical pump operating behavior using performance curves. It covers pump structure (hydraulic and mechanical assemblies), key standards for petrochemical pump manufacturing, and operating concepts such as Best Efficiency Point (BEP), NPSHr/NPSHa, and cavitation risks to support reliable bearing and system performance.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/bearings-in-centrifugal-pumps-application-handbook/651134/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/bearings-in-centrifugal-pumps-application-handbook/651134.png","ImageObject",300,407,{"name":92,"@type":93},"Noah","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-24",true,{"@type":102,"interactionType":103,"userInteractionCount":29},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What does the Best Efficiency Point (BEP) mean for centrifugal pump operation?","Question",{"text":112,"@type":113},"BEP is the pump design and operating point where flow experiences the least friction and disturbance. For lowest power consumption, the handbook recommends operating between 80 and 100% of BEP, with common operation between 50 and 120% of BEP.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How are NPSHr and NPSHa used to predict cavitation?",{"text":117,"@type":113},"NPSHr is the suction head required for the pump to draw fluid satisfactorily. If the available NPSHa is less than NPSHr, cavitation occurs and performance is reduced.",{"name":119,"@type":110,"acceptedAnswer":120},"How does the handbook describe centrifugal pump energy transfer?",{"text":121,"@type":113},"A rotating impeller accelerates fluid through its vanes into the pump casing, converting kinetic energy into potential energy at higher pressure. As fluid exits the impeller, more fluid is drawn into the inlet, maintaining continuous flow through the impeller.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},651134,1792920639,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":29,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145},8796095462418,"https://ap-avatar.wpscdn.com/avatar/80000253c1241d02b47?x-image-process=image/resize,m_fixed,w_180,h_180&k=1778826106357471780","Bearings in   \ncentrifugal pumps  \nApplication handbook  \nTable of contents  \n2 Preface  \n3 General  \n8 Pump bearings  \n19 Ball bearings in centrifugal pumps  \n28 Roller bearings in centrifugal pumps  \n33 Bearing technologies for the next generation pump  \n35 Bearing installation  \n1  \nPreface  \nThis application handbook is one of a series of application handbooks designed to provide specific application recommendations for SKF® customers when used with the SKF General Catalog.  \nIt is not possible, in the limited space of this handbook, to present all the information necessary to cover every application in detail. SKF application engineers should be contacted for specific bearing recommendations. The higher the technical demands of an application and the more limited the available experience, the more advisable it is to make use of SKF’s engineering service.  \nWe hope you find this handbook interesting and useful.  \nGeneral  \nPrinciples of centrifugal pumps  \nA pump is a device for lifting, transferring, or moving fluids by suction or pressure from one position to another.  \nThe centrifugal pump is a type of pump that uses the kinetic energy of a rotating impeller to impart motion to the fluid, see figure 1.1. The rotating impeller accelerates the fluid through its vanes and into the pump casing where the kinetic energy  \nof the moving fluid is converted to potential energy at higher pressure. As the fluid leaves the impeller through the pump discharge, more fluid is drawn into the pump inlet where the pressure is lowest. This fluid passes through the impeller as still more fluid enters the impeller.  \nThere are three classifications of centrifugal pumps: radial flow, mixed flow and axial  \nFigure 1.3  \n'MPX SBUF \\#&1  \nflow based on the direction the fluid enters the inlet (eye) of the impeller, see figure 1.2. Radial and mixed flow pumps are either single or double suction designs.  \nA centrifugal pump produces head, Has a function of the rate of fluid flow, Q through the impeller, see figure 1.3. Head is the energy content in the pumped fluid, expressed in meters, m (ft) .  \nFigure 1.2  \nClasses of centrifugal pumps  \nRadial flow  \nMixed flow  \nAxial flow  \nThe hydraulic performance of a centrifugal pump is characterized by the mechanical shape and size of the impeller, using an index number called specific speed, ns, see figure 1.4.  \nThe specific speed number of a pump is calculated by the following equation:  \nn Q1/2  \nns = H3/4  \nwhere  \nns = specific speed  \nn = pump rotational speed, r/min  \nQ = pump flow rate, m3/s (US gallons/min) at best efficiency point, BEP  \nH = pump total head, m(ft) at the BEP *US units are in parenthesis  \nThe characteristics of a pump based on specific speed are approximately as according to the table.  \nPump characteristics  \n\n| Specific\u003Cbr>speed | ns | Characteristic |\n| --- | --- | --- |\n\nlow  \nmedium  \nhigh  \nhighest  \n10-35 (500-1750)  \n35-85  \n(1750-4250)  \n85-160 (4250-8000)  \n160-300 (8000-15000)  \nlow flow high head  \nmedium flow  \nmedium head  \nhigh flow low head  \nmaximum flow minimum head  \nA centrifugal pump consists of a hydraulic assembly and a mechanical assembly, see figure 1.5. The components of the hydraulic assembly are the impeller, casing (volute), inlet and discharge piping, and shaft seal. The components of the mechanical assembly are the shaft and bearings, pump frame and housing seals, baseplate, and drive coupling or belt sheaves.  \nFor petrochemical applications, the pump industry has developed standards for the manufacture and supply of centrifugal pumps. Two important standards are the ASME/ANSI B73 .1 for chemical process pumps and API 610 for general refinery service pumps. These standards define the minimum technical requirements for the mechanical design of the pumps and bearings etc. Because of the strong American influence on petrochemical plant engineering, these standards have worldwide implications.  \nThe centrifugal pump impeller is most typically sup","cbCaifIzPoS50Kqb","https://ap.wps.com/l/cbCaifIzPoS50Kqb","pdf",1437226,38,"English","# Preface\n# General\n## Principles of centrifugal pumps\n## Pump operation and performance\n## Pump assemblies (hydraulic and mechanical)\n## Standards for petrochemical applications\n# Pump bearings\n# Ball bearings in centrifugal pumps\n# Roller bearings in centrifugal pumps\n# Bearing technologies for the next generation pump\n# Bearing installation","[{\"question\":\"What does the Best Efficiency Point (BEP) mean for centrifugal pump operation?\",\"answer\":\"BEP is the pump design and operating point where flow experiences the least friction and disturbance. For lowest power consumption, the handbook recommends operating between 80 and 100% of BEP, with common operation between 50 and 120% of BEP.\"},{\"question\":\"How are NPSHr and NPSHa used to predict cavitation?\",\"answer\":\"NPSHr is the suction head required for the pump to draw fluid satisfactorily. If the available NPSHa is less than NPSHr, cavitation occurs and performance is reduced.\"},{\"question\":\"How does the handbook describe centrifugal pump energy transfer?\",\"answer\":\"A rotating impeller accelerates fluid through its vanes into the pump casing, converting kinetic energy into potential energy at higher pressure. As fluid exits the impeller, more fluid is drawn into the inlet, maintaining continuous flow through the impeller.\"}]","Bearings in centrifugal pumps - Application handbook | PDF",1792864878,96]