{"id":3329,"date":"2025-09-23T08:59:04","date_gmt":"2025-09-23T08:59:04","guid":{"rendered":"https:\/\/dolka.tr\/the-priceless-truth-the-most-expensive-pump-is-often-the-cheapest\/"},"modified":"2025-10-02T19:01:41","modified_gmt":"2025-10-02T19:01:41","slug":"the-priceless-truth-the-most-expensive-pump-is-often-the-cheapest","status":"publish","type":"post","link":"https:\/\/www.dolka.tr\/en\/the-priceless-truth-the-most-expensive-pump-is-often-the-cheapest\/","title":{"rendered":"The Priceless Truth: The Most Expensive Pump Is Often the Cheapest"},"content":{"rendered":"

When you think of the cost of a pump, what comes to mind first?<\/p>\n

Most likely, the initial investment cost. Yet, this is only the beginning of the story. When it comes to industrial pumps, the largest cost factor is not the purchase itself, but the energy the pump consumes throughout its entire lifetime<\/strong>.<\/p>\n<\/div>

So, what are the components of a pump\u2019s Total Cost of Ownership (TCO) over its entire lifetime?<\/h6><\/div>

\"\"<\/p>\n<\/div>

Surprising but true: a full 85% of a pump\u2019s TCO comes from energy costs.<\/strong> This proves just how much of a difference the right pump selection and operational strategies can make in the long run.<\/p>\n<\/div>

The Two Golden Rules of Efficiency: BEP Optimization and the Use of VFDs<\/h2><\/h5><\/div>

To boost energy efficiency and eliminate hidden costs, we need to focus on these two golden rules. Let\u2019s take a closer look at them together\u2026<\/p>\n<\/div>

BEP (Best Efficiency Point)<\/h3><\/h6><\/div>

All pumps are designed to perform optimally around a specific duty point (a combination of flow rate and pressure). This point, where the pump operates at its highest efficiency, is called the Best Efficiency Point (BEP).<\/b><\/p>\n<\/div>

\"\"<\/p>\n<\/div>

BEP Cone<\/h3><\/h6><\/div>

The BEP cone is the hydraulically stable and highly efficient operating range defined around the BEP on the pump\u2019s characteristic curve, typically covering a flow range of \u00b110\u201315%.<\/p>\n<\/div>

\"\"<\/p>\n<\/div>

Operating a pump far from its BEP leads to energy losses, hydraulic instability, and severe failures.<\/p>\n

Regions outside the BEP cone are where the pump\u2019s hydraulic balance is disrupted;<\/p>\n

    \n
  • High temperature<\/li>\n
  • Cavitation<\/li>\n
  • Vibration and noisy operation<\/li>\n
  • Backflow & recirculation<\/li>\n
  • Reduced seal and bearing life<\/li>\n<\/ul>\n

    These are inefficient operating zones where failures and energy losses increase.<\/p>\n<\/div>

    \"\"<\/p>\n<\/div>

    Therefore, from every perspective, keeping the pump\u2019s operating point as close as possible to the BEP is the optimal choice for equipment longevity, product quality, and process safety.<\/strong><\/p>\n<\/div>

    Using VFDs (Variable Frequency Drives)<\/h2><\/h5><\/div>

    Throttle Valve or VFD? The Right Choice for Energy Savings\u2026<\/h3><\/h6><\/div>

    One of the traditional methods for flow control, throttle valves, unfortunately leads to significant energy waste. Let\u2019s examine the use of a throttle valve versus a VFD for a given duty together.<\/p>\n<\/div>

    Duty: 50,000 L\/h \u2013 5.0 bar \u2013 No VFD \/ Power Consumption: 10.8 kW<\/h6><\/div>

    First, we selected our pump for this duty, and now let\u2019s look at our alternatives when a lower flow rate is needed.<\/p>\n<\/div>

    \"\"<\/p>\n<\/div>

    Alternative 1 (Using a Throttle Valve)<\/h3><\/h6><\/div>

    In a scenario without a VFD, the only way to reduce a pump\u2019s flow is by increasing the pressure.<\/em><\/p>\n

    The way to do this is by installing a \u201cthrottle valve<\/strong>\u201d at a point on the pump\u2019s discharge line, decreasing the flow area to increase the pump\u2019s head, and throttling until the desired flow is reached on the pump\u2019s characteristic curve.<\/p>\n<\/div>

    Result: 40,000 L\/h \u2013 5.2 bar \u2013 No VFD \/ Power Consumption: 9.60 kW<\/strong><\/h3><\/h6><\/div>

    \"\"<\/p>\n<\/div>

    Alternative 2 (Using a VFD)<\/h3><\/h6><\/div>

    In a scenario using a VFD, adjusting the frequency via the VFD will achieve the same task.<\/p>\n

      \n
    • When 50 TPH \u27a1\ufe0f 40 TPH;;<\/li>\n
    • 50Hz \u27a1\ufe0f 40Hz<\/li>\n<\/ul>\n

      For the same conditions, the line pressure drop: 5 bar \u27a1\ufe0f 3.3 bar (This is not possible with a throttle valve; the pump operates along its own curve).<\/p>\n

        \n
      • 10,8kW \u27a1\ufe0f 4,9kW<\/li>\n<\/ul>\n

        An incredible energy saving.<\/b><\/em><\/p>\n<\/div>

        \"\"<\/p>\n<\/div>

        So, the result\u2026<\/h3><\/h6><\/div>

        \"\"<\/p>\n<\/div>

        \n

         <\/p>\n<\/div>

        BONUS<\/h3><\/h6><\/div>

        Let\u2019s consider two different duties (e.g., long-term low-flow production and short-term high-flow CIP cleaning<\/em>).<\/p>\n

          \n
        • Duty 1: 70,000 L\/h \u2013 5bar<\/strong><\/li>\n
        • Duty 2: 45,000 L\/h \u2013 2bar<\/strong><\/li>\n<\/ul>\n

          For such an application;<\/p>\n

            \n
          • Can we handle it with the same pump?<\/strong><\/li>\n
          • What kind of pump should we choose?<\/strong><\/li>\n<\/ul>\n

            So, when selecting a pump\u2026<\/p>\n

              \n
            1. Should we select it based on the maximum capacity?<\/strong><\/li>\n
            2. Or should we select it based on the minimum capacity?<\/strong><\/li>\n<\/ol>\n<\/div>

              Let\u2019s first select it based on the maximum capacity.<\/h3><\/h6><\/div>
                \n
              • Duty 1: 70,000 L\/h \u2013 5bar<\/strong><\/li>\n
              • Result: VFD:50 Hz \/ Power consumption 13.85 kW<\/strong><\/li>\n<\/ul>\n<\/div>

                \"\"<\/p>\n<\/div>

                  \n
                • Duty 2: 45,000 L\/h \u2013 2bar<\/strong><\/li>\n
                • Result: VFD:32 Hz \/ Power consumption 3.64 kW<\/strong><\/li>\n<\/ul>\n<\/div>

                  \"\"<\/p>\n<\/div>

                  Result: Selection 1 (Based on Maximum Capacity)<\/h3>\n
                  \n
                  \n
                  \n
                  <\/div>\n<\/div>\n<\/figure>\n<\/div><\/h6><\/div>

                  \"\"<\/p>\n<\/div>

                  Now, let\u2019s select it based on the minimum capacity.<\/h3><\/h6><\/div>
                    \n
                  • Duty 1: 70,000 L\/h \u2013 5bar<\/strong><\/li>\n
                  • Result: VFD:60 Hz \/ Power consumption 13.62 kW<\/strong><\/li>\n<\/ul>\n<\/div>

                    \"\"<\/p>\n<\/div>

                      \n
                    • Duty 2: 45,000 L\/h \u2013 2bar<\/strong><\/li>\n
                    • Result: VFD:38 Hz \/ Power consumption 3.50 kW<\/strong><\/li>\n<\/ul>\n<\/div>

                      \"\"<\/p>\n<\/div>

                      So, the result\u2026<\/h3><\/h6><\/div>

                      \"\"<\/p>\n<\/div>

                      The Sharp Intersection of Efficiency, Profitability, and Sustainability<\/h2><\/h5><\/div>

                      In centrifugal pump systems, the steps to reduce TCO and increase operational efficiency are quite clear:<\/p>\n

                        \n
                      • Analyze your operational requirements and select the pump model closest to the BEP.<\/li>\n
                      • Prefer VFDs over throttle valves for flow control.<\/li>\n<\/ul>\n

                        Remember, technology and the right engineering approach are the most effective ways to optimize your operating costs. The cheapest pump is the one that consumes the least energy and operates most efficiently.<\/strong><\/p>\n

                        So, what steps are you taking in your operation to reduce these energy costs?<\/p>\n<\/div>

                        Contact us to learn more and discover tailored solutions for your company.<\/h3><\/h6><\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":3337,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[111,105],"tags":[109,108,107,106,110],"class_list":["post-3329","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-energy","category-pump","tag-bep-en","tag-efficiency","tag-energy","tag-pump","tag-vfd-en"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.dolka.tr\/en\/wp-json\/wp\/v2\/posts\/3329","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dolka.tr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dolka.tr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dolka.tr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dolka.tr\/en\/wp-json\/wp\/v2\/comments?post=3329"}],"version-history":[{"count":0,"href":"https:\/\/www.dolka.tr\/en\/wp-json\/wp\/v2\/posts\/3329\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.dolka.tr\/en\/wp-json\/wp\/v2\/media\/3337"}],"wp:attachment":[{"href":"https:\/\/www.dolka.tr\/en\/wp-json\/wp\/v2\/media?parent=3329"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dolka.tr\/en\/wp-json\/wp\/v2\/categories?post=3329"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dolka.tr\/en\/wp-json\/wp\/v2\/tags?post=3329"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}