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| Pumping Waste Water in Electronics Manufacturing |
For over a year, an electronics manufacturer utilized a well-known brand of non-metallic centrifugal pump for a HF recirculation application in their waste treatment process. The centrifugal pump was used to re-circulate a mixture of hydrofluoric acid and polymer on a continuous basis using an eductor mixing system in a large holding tank. After a six-month period the centrifugal pump failed due to worn bearings and seal leakage. The installed plastic centrifugal pump was carefully inspected for mis-alignment and other possible installation problems that might have caused the early bearing and seal failure. The centrifugal pump was carefully reassembled with all original parts and put back into service. After another six month period the centrifugal pump failed in the same fashion. Frustrated after spending over $3,800.00 per rebuild, the manufacturer set out to find a reliable non-metallic ANSI centrifugal pump that would hold up to the demanding 24 hour, seven day a week process. After a careful review of many different process pumps, the manufacturer decided on the Stan-Cor non-metallic ANSI centrifugal pump to service this demanding application. While inspecting the Stan-Cor’s non-metallic ANSI centrifugal pump bearing frame it was obvious that it’s large power frame would easily out perform the other centrifugal pump’s lighter duty rail type frame. Stan-Cor’s non-metallic ANSI centrifugal pump new duplex angular contact thrust bearings would also ensure that both axial and radial thrust would be kept to a minimum. This exclusive design encourages longer seal life, particularly for continuous duty applications. The Stan-Cor non-metallic ANSI centrifugal pump also uses solid Kynar 320 pump casing, eliminating failure from delaminating, as experienced with plastic lined pumps Additionally, the Stan-Cor non-metallic ANSI centrifugal pump with its concentric volute design and operating speeds of 1750 or 1150 RPM to keep internal turbulence to a minimum. Maximizing bearing and mechanical seal life. After over two years of continual 24 hour, 7 day a week service the Stan-Cor non-metallic ANSI pump has operated without incident and continues to be trouble free to this date. The Stan-Cor non-metallic ANSI pump is also available with a solid TFE Teflon pump casing for the most severe corrosives or high temperature applications.
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Wanner Engineering, Inc.
Wanner International Ltd.