APE Pumps Refurbishes 30-Year-Old Circulation Pumps
A power station in South Africa will be operating with fully refurbished concrete volute cooling water circulation pumps after 30 years of reliable service. The pumps were manufactured and installed by APE Pumps in 1983.
During the refurbishment process, the power station requested a higher flow rate from the pumps. APE Pumps commissioned its parent company WPIL to research the possibility of altering the impeller design to allow a higher flow. The proposed redesigned impeller would increase output of each pump by almost 7% (up to 6.2 m3/s from 4.8 m3/s) without needing to rebuild the concrete volute housings, which are fixed and cannot be changed.
After the pump refurbishment is complete, the combine additional output of all twelve pumps will be 4.8 m3/s, equivalent to an additional machine. This will allow higher operational turbine efficiencies and additional electricity output from the power station.
In addition to the refurbishment, APE also manufactured one new machine for the power station to be used as a changeover unit while the original pumps are removed one at a time for refurbishment in Wadeville.