{"id":7795,"date":"2026-05-19T12:26:41","date_gmt":"2026-05-19T10:26:41","guid":{"rendered":"https:\/\/www.cdrpompe.com\/?p=7795"},"modified":"2026-06-24T11:07:30","modified_gmt":"2026-06-24T09:07:30","slug":"centrifugal-positive-displacement-pumps","status":"publish","type":"post","link":"https:\/\/www.cdrpompe.com\/en\/centrifugal-positive-displacement-pumps\/","title":{"rendered":"Difference Between Centrifugal and Positive Displacement Pumps: Technical Guide to Selection"},"content":{"rendered":"<h2><b>Summary<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">This article provides a clear and practical analysis of the difference between centrifugal and positive displacement pumps, two widely used technologies in industrial pumping systems.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The comparison starts from the operating principle: centrifugal pumps, based on energy transfer through an impeller, ensure continuous flow; positive displacement pumps move fixed volumes of fluid, maintaining a constant flow regardless of pressure variations.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The analysis then explores key operational differences, highlighting how flow rate, pressure, efficiency, and fluid type directly influence technology selection. Practical examples illustrate the most suitable applications for each pump type.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A dedicated section compares advantages and limitations, providing a useful framework for technical decision-making. The article concludes with practical guidelines for selecting the most suitable pump, emphasizing the importance of evaluating real operating conditions.<\/span><\/p>\n<h2><b>Operating Principle of Centrifugal Pumps<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Centrifugal pumps belong to the family of rotodynamic machines.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The fluid enters the <a href=\"https:\/\/www.cdrpompe.com\/en\/impeller-for-centrifugal-pumps\/\" target=\"_blank\" rel=\"noopener\">impeller<\/a> eye and is accelerated outward by centrifugal force. Mechanical energy is first converted into kinetic energy and then into pressure energy, allowing the fluid to move along the discharge line.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A key characteristic is <\/span><b>continuous flow<\/b><span style=\"font-weight: 400;\">, which ensures smooth fluid handling.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pump performance depends on the interaction between the pump curve and the system curve, meaning that variations in system resistance directly affect the operating point.<\/span><\/p>\n<h2><b>Operating Principle of Positive Displacement Pumps<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Positive displacement pumps transfer fluid by moving defined volumes within a closed chamber.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Each cycle delivers a <\/span><b>fixed quantity of fluid<\/b><span style=\"font-weight: 400;\">, making flow rate proportional to speed and largely independent of pressure variations.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This makes them ideal for applications requiring <\/span><b>precise flow control<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Main types include:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Diaphragm pumps<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Gear pumps<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Screw pumps<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Lobe and piston pumps<\/span><\/li>\n<\/ul>\n<h3><b>Key Operational Differences<\/b><\/h3>\n<p><b>Flow rate and pressure response<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Centrifugal pumps: flow varies with pressure<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Positive displacement pumps: flow remains constant<\/span><\/li>\n<\/ul>\n<p><b>Fluid type<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Centrifugal pumps: low-viscosity fluids (water, solvents)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Positive displacement pumps: viscous or complex fluids<\/span><\/li>\n<\/ul>\n<p><b>Pressure<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Centrifugal pumps: medium pressures<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Positive displacement pumps: high pressures<\/span><\/li>\n<\/ul>\n<p><b>Efficiency<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Centrifugal: best at BEP<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Positive displacement: stable efficiency<\/span><\/li>\n<\/ul>\n<h3><b>Applications<\/b><\/h3>\n<p><b>Centrifugal pumps<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Water transfer<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Chemical processes<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Cooling systems<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">High flow \/ low viscosity<\/span><\/li>\n<\/ul>\n<p><b>Positive displacement pumps<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Oils, resins, paints<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Food products (syrups, creams)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Slurries and solids<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Dosing systems<\/span><\/li>\n<\/ul>\n<h3><b>Advantages and limitations<\/b><\/h3>\n<p><b>Centrifugal pumps<\/b><\/p>\n<p><b>Advantages<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">High flow rates<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Lower costs<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Simple maintenance<\/span><\/li>\n<\/ul>\n<p><b>Disadvantages<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Sensitive to viscosity<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Limited pressure<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Sensitive to operating point<\/span><\/li>\n<\/ul>\n<p><b>Positive displacement pumps<\/b><\/p>\n<p><b>Advantages<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Constant flow<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">High pressure capability<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Suitable for viscous fluids<\/span><\/li>\n<\/ul>\n<p><b>Disadvantages<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Higher cost<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">More complex design<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Requires safety systems<\/span><\/li>\n<\/ul>\n<h3><b>Selection criteria<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Key parameters:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Fluid type and viscosity<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Required flow rate<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Operating pressure<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Presence of solids<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Process continuity<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">A proper technical evaluation ensures reliable operation and long-term efficiency.<\/span><\/p>\n<h3><b>Conclusion<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">The difference between centrifugal and positive displacement pumps lies in:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">how the fluid is moved<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">how the pump reacts to pressure<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">the ability to manage viscosity<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\"><a href=\"https:\/\/www.cdrpompe.com\/en\/\" target=\"_blank\" rel=\"noopener\">The correct choice<\/a> depends on the<a href=\"https:\/\/www.cdrpompe.com\/en\/contact\/\" target=\"_blank\" rel=\"noopener\"> real process conditions<\/a>, not on general preferences.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Summary This article provides a clear and practical analysis of the difference between centrifugal and positive displacement pumps, two widely&#8230;<\/p>\n","protected":false},"author":4,"featured_media":7626,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[41],"tags":[],"class_list":["post-7795","post","type-post","status-publish","format-standard","has-post-thumbnail","category-news-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Difference between centrifugal and positive displacement pumps<\/title>\n<meta name=\"description\" content=\"Learn about the differences between centrifugal and positive-displacement pumps, how they work, their advantages, and their real-world applications\" \/>\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.cdrpompe.com\/en\/centrifugal-positive-displacement-pumps\/\" 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