1 Haile Gold Mine 10.14.2019 The INNOMAG pump installed at Haile Gold mine was not producing the required GPM or TDH. An INNOMAG 6 X 4 -10 H with a 7.5 HP Motor, 1200 RPM @ 340 GPM and 45 TDH, the pump was specified to circulate process fluid stores in two holding tanks and a supply tank. However, it was not circulating the process fluid quickly enough. To rectify this, the plant decided to increase the GPM to 450 GPM # 80 TDH, which required the original pump be replaced with a 20 HP, 1750 RPM, 6 X 4 -10 H. This pump operated for about a year without any issues. When the system was restarted after a shutdown, the pump’s suction valve didn’t open, causing the pump to fail. Subsequently, this pump and volute was replaced, but this 3 rd installation would not develop enough flow or pressure. Assessment. At this point, PP&S was called in to assess the problem. We replaced the installation with yet another new 450 GPM @ 80 TDH pump, but after startup, it would not produce over 8 PSI discharge pressure. We removed the pump from the volute and found the volute wear ring had cracks and the volute was detached. We installed a new volute and pump, reinstalling the 20 HP, 1750 RPM motor. Prior to starting the pump, we opened the suction valve to the pump and noted it had about 8 PSI on the discharge gauge. Upon starting the pump, the pressure increased to 10 PSI, but the pump made a humming noise and developed an increase in vibration. The average AMP reading was 6 AMPs and all three legs were within 0.3 AMPs of each other. We put a strobe light on the motor fan blade and noted the motor was rotating at 1800 RPM. The motor was using approximately 4.8 HP based on 6 AMP average. Minimum continuous stable flow was 75 GPM@ 85 TDh with 7.7 HP @ 9.1 AMPs. At this point, we realized that the motor magnets were not strong enough to rotate the pump 1800 RPM. We replaced the magnets with the CFO magnets. The new pump had the incorrect magnets installed, which were not strong enough to drive the pump, causing minimum flow and discharge pressure at dead head condition operating at 6 AMPs, and in turn, excessive vibration. The pump shaft also deflected causing wear all around the impeller and the casing wear ring at 60 degrees from the cutwater. The radial bearing damage was consistent with the excessive thrust. The weak magnet issue also contributed to the inner cap separation. The pump