ADVERTORIALS


TECHNOLOGY IN ACTION


TWO HIGH FLOW SELF-PRIMING PUMPS TO BOOST WATER PRESSURE AT A MINING SITE IN WEST AFRICA


Why was water pressure dangerously low? There were a number of factors. They were being caused by a continuing lack of govern- ment investment in vital national infrastructure, demand from other users nearby as well as leaks within the suction pipe. The client recognised that identifying the exact cause of the problem could take years. So they were looking at timely and cost-effective ways for them to maintain production within their mine without suffering stoppages and incurring downtime. In short, they had to stop their existing pumps losing prime in service, make sure that


they were always primed and wouldn’t experience any harmful dry running. They asked North Ridge pumps for advice.


So what was our specification for this client? The mining company wanted to explore various options for solving their problem. After looking into the issue and discounting submersible and vertical immersion pumps, we rec- ommended that they use a surface-mounted self-priming pump. From our discussions, we knew that the client already had compressed air on site for this particular application. We therefore selected a pair of our XHLE end suction centrifugal pumps fitted with an air-driven air ejector for pump priming. This will enable these high flow self-priming pumps with air ejector to achieve a suction lift of 6.5M. Traditionally, self-priming pumps feature an open or semi-open impeller to handle solids or unexpected particles. As these self-priming freshwater transfer pumps are end suction pumps with closed impellers they will operate at a higher efficiency due to the impellers having sidewalls.


This means that these high flow self-priming pumps with air ejector can operate at


We were recently contacted by a potential new client in Guinea who were having issues with the centrifugal pumps at their mining site. Their existing units were losing pressure, also known as prime, when operating because of low incoming water pressure. This was causing significant water shortages across their site. In fact, the inlet pressure to their centrifugal pumps was so low that the pumps had to be stopped or have their pumping capacity vastly reduced, to prevent expensive damage to their pumps.


around 81% efficiency. An equivalent self-priming pump may only be able to reach around 60%-70% efficiency due to the impeller design. In addition, the 1000rpm motor helps to ensure that NPSH requirements are kept low and enables the pump to operate for long periods without needing frequent servicing. Built with ductile iron casings and impellers for many years of uninterrupted service, these self-priming freshwater transfer pumps will deliver around 400M³H at 40M head.


NORTH RIDGE PUMPS www.northridgepumps.com


1 Going green takes bottle


Most customers will tell you just how efficient Sepura oil-water condensate units are. But did you know that our patented filtration media


This not only makes the outputs from our units environmentally friendly but also our manufacturing process too.


Going green and achieving your targets doesn’t have to be a compromise.


SEPURA™ is part of the Bowman Group Visit our website to learn more about our Silexa™ filtration media www.sepura-technologies.com 34 PROCESS & CONTROL ENGINEERING | MAY 2026


t: +44 (0)1543 379212 e: sales@sepura-technologies.com


1 2


found inside every


genuine Sepura unit is made from recycled glass bottles?


3 4 2 Oily water in


Passes through de-pressurising void and bulk oil removal shred to remove initial large oil deposits


SILEXA™ final filter medium 20%


more absorbent compared to other OEM products.


Outlet port levels less than 5ppm. 4 3


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