Pumps & Systems, September 2007The concept of using a positive displacement pump to transfer dewatered biosolids, commonly called sludge cake, is not new. However, the designs of the pumps used...
Pumps & Systems, September 2007 In the past, the nuclear power industry has experienced equipment failures due to improperly set oilers. There was never a precision tool available to help ensure...
Pumps & Systems, September 2007Back in the old days, level control had little or nothing to do with saving energy. In fact, it was often a necessary evil. Today, that is no longer true - the VFD...
Pumps & Systems, September 2007Why question the PLC? For many, questioning the application of a PLC to the pump station panel is surprising. After all, the pump station panel was once controlled...
Pumps & Systems, September 2007Using root cause failure analysis to address equipment design and manufacturing deficiencies that increase pump reliability and reduce equipment failures. Define the...
Pumps & Systems, September 2007 This municipal water system evaluated the cost of upgrading their existing SCADA software and decided it was time to consider replacements. After much...
Hydraulic Institute Pump FAQs September 2007
Q. What are the most probable causes of insufficient discharge flow or pressure in centrifugal pumps?A. Before looking at the pump, check the measurement of total head and rate of flow. The proper...
Pumps & Systems, September 2007 Economic pressures to minimize production downtime and improve operating efficiency are increasing the emphasis to accomplish on-site problem detection, analysis,...
Most VFD systems use some form of closed-loop feedback to avoid surging, excessive noise, and in extreme cases, vibration. A reliable encoder signal is one method that minimizes speed variance and...
We were told that the 48-in diameter sewage pump impeller from one of New York City's main sewage pumps had been found "practically destroyed." When the impeller actually arrived at our location, both...
Reliability Improvements to a High Speed/High Energy Pump
Pumps & Systems, September 2007The pump is a 300-hp integrally geared propylene product pump in a Gulf Coast olefins unit that operates at 25,000-rpm and produces 6000-ft of head (see Figures 1...
Pumps & Systems, September 2007 SCADA can be utilized for remote data acquisition, but because it is primarily a real-time control system, the user must make significant compromises to use it for...
Pumps & Systems, September 2007A large wastewater processing plant experienced continual problems with its influent raw wastewater pumps for several years. These pumps are rated at 70,000-gpm,...
A large wastewater processing plant experienced continual problems with its influent raw wastewater pumps for several years. These pumps are rated at 70,000-gpm, 24-ft head and driven by 500-hp,...
Pumps & Systems, September 2007When I was first asked to define MTBF, MTBR, and MTBPM, I wasn't sure why. Of all the myriad reliability metrics employed, I had to ask myself, "Why were these...