Is your pumping system the core of your process or production? If it is underperforming, you may not reach your operational objectives, which can ultimately effect your business’ bottom line.
Global Pumps understand how critical consistent pump performance is - which is why in this blog we discuss improvement opportunities that you can implement right now!
What is the best efficiency point (BEP) of a pump?
The BEP shows where your pump is performing most efficiently. This point is generally provided by the pump manufacturer. If your pump is operating at other points on the pump curve, you may experience lower efficiency.
In the video below, Amos discusses BEP:
Preferred Operating Region (POR)
When your pumping system is working at maximum reliability, it is in the Preferred Operating Region (POR). As the pump operates within this range, the flow within the pump is relatively uniform, it suits the pump’s hydraulic geometry, and has minimal flow separation within the impeller. As the pump operates in the POR, the service life of the pump will not be affected by the internal hydraulic load or flow induced vibrations - thus increasing your site’s success.
For centrifugal type rotodynamic pumps, the POR is between 70% and 120% of the Best Efficiency Point (BEP). However, this will be narrower for higher specific speed pumps in the mixed and axial flow types.
For those pumping systems handling high concentrations of abrasive solids, the POR is primarily determined by wear considerations, and may be narrower than for most rotodynamic pumps.
Tip #1: To immediately improve your reliability, ensure your pumping system is operating within this POR - 70% - 120%. If you meet the criteria of higher specific speed or high concentrations of abrasive solids, consider a narrower POR.
Tip #2: Investigate whether a condition monitoring device can be installed to monitor pump performance. These devices will allow you to track your pump's output and ensure it is within the POR.
Allowable Operating Region (AOR)
If you are unable to maintain the flow within the POR, Global Pumps recommend ensuring your pump is within the Allowable Operating Region (AOR). This AOR refers to the range of flow rates recommended by the pump manufacturer and is verified based on the system’s operating conditions (Net Positive Suction Head).
When you operate your pump outside the POR, the bearing life will be reduced, and noise, vibration and component stresses will be increased.
Tip #3: Due to the reduced bearing life, as well as other consequences, Global Pumps recommends your pump is within the POR. However in some circumstances this is not possible. Therefore, our team suggest discussing your pump's performance with an expert to optimise it specifically for your application. There may be accessorese suitable to ensure optimal performance.
Global Pumps recommend discussing the POR and AOR with your pump supplier or the manufacturer. By understanding these regions and where your pump is operating within them, will ensure your pump’s performance is consistent. It is also important to consider that the POR and AOR will depend on the pump's application and/or pumped product - which is why professional guidance is highly advised.
With over 40 years' experience, Global Pumps can assist you in ensuring your pumping system is reliable, efficient and performing to the best of its capabilities. Get in touch today!
