Browsing State Agencies by Author "International Pump Users Symposium (10th : 1993)"

Now showing items 1-18 of 18

    • Application Of Variable Speed Electric Motors For Pumps 
      Murphy, Stephen P. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1993)
      Pumps operated with variable and higher speed electric motors provide numerous benefits such as greater range of flow and head, higher head from a single stage, valve elimination, and energy saving. To achieve these benefits, ...
    • Canned Motor And Magnetically Coupled Pumps - Applications, Operations, And Maintenance In A Chemical Plant 
      Vollmuller, Helmut; Seifert, Willi; Fischer, Kenneth B. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1993)
      The environmental requirements that drive chemical producers to move more and more to the use of the “sealless” pump are described. The development of the sealless pumps in the European industrial community and their ...
    • A Case History - Improved Hydraulic Design Lowers Cavitation Erosion And Vibrations Of A Water Transport Pump 
      Florjancic, Stefan S.; Clother, Alan D.; Chavez, Francisco Javier Lopez (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1993)
      In this case history, the successful application of well-known tools for hydraulic design changes and cavitation erosion prediction is presented. A description of the tools can be found in many publications and will not ...
    • Cavitation And Recirculation Troubleshooting Methodology 
      Schiavello, Bruno (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1993)
      High reliability and large rangeability are required of pumps in existing and new plants which must be capable of reliable on-off cycling operations and especially low load duties. The reliability and rangeability target ...
    • Controlling Emissions To Atmosphere Through The Use Of A Dry-Sliding Secondary Containment Seal 
      Flach, Patrick M.; Sandgren, Jan E.; Casucci, David P. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1993)
      Increasing concern over the emission of hazardous compounds to the atmosphere has led to stricter regulations regarding the acceptable amount of leakage from pumps. This is forcing the users and manufacturers of pumps and ...
    • Corrosion In Pumps And Other Damage Mechanisms 
      Miller, Ronald S. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1993)
      The successful application of pumps in handling a variety of fluids depends upon knowledgeable design considerations, and the selection of the correct materials for the liquid environment. A previous tutorial “Corrosion ...
    • Design And Testing Of A Zero-Net Radial Taper, Radially Compliant Face Seal 
      Lebeck, Alan O. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1993)
      Conventional seal designs, the net radial taper changes with operating conditions so that contact is not always maintained across their entire width and leakage can occur. The “zero-net” face seal combines two ideas to ...
    • Dynamic Loading On Pumps - Causes For Vibration 
      Florjancic, Stefan; Frei, Arno (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1993)
      Some insight into the mechanism which generate lateral dynamic loads, and hence vibrations, on centrifugal pumps is presented in a general way, and the individual loads are explained and quantified. Without extensive use ...
    • Enhanced Mechanical Seal Performance Through Proper Selection And Application Of Enlarged-Bore Seal Chambers 
      Adams, William V.; Robinson, Richard H.; Budrow, James S. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1993)
      Recent studies of enlarged-bore seal chambers document the influence of chamber design on seal performance. The studies utilize laser Doppler velocimetry (LDV), high speed videography, and computational fluid dynamics (CFD) ...
    • Magnetic Fluid Seal System For Control Of Pump Fugitive Emissions 
      Key, William E.; Young, Lionel A.; Mraz, Will B.; McMahan, Paul; Black, Thomas J. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1993)
      Pump fugitive emissions can now be controlled to near zero levels by the use of a simplified dual seal system. A magnetic fluid secondary seal traps any vapors that leak past the primary mechanical seal. This arrangement ...
    • Model Predictions And Experimental Results For The Rotordynamic Characteristics Of Leakage Flows In Centrifugal Pumps 
      Guinzburg, Adiel; Brennen, Christopher E. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1993)
      The role played by fluid forces in determining the rotordynamic stability and characteristics of a centrifugal pump is gaining increasing attention. The present research investigates the contributions to the rotor dynamic ...
    • Pressure Pulsation Dampening Methods For Reciprocating Pumps 
      Vetter, Gerhard; Seidl, Bernd (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1993)
      The safe design of piping installations for reciprocating pumps requires proper knowledge about the pump installation interaction. A compact review shows pump vibration spectra excited by the pumps and methods of numerical ...
    • Shaft Sizing For Multistage Pumps 
      Bolleter, Ulrich; Frei, Arno (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1993)
      For proper sizing of pump shafts, many criteria need to be considered such as stress, deformation, and rotordynamics. The authors try to shed more light on these areas in order to ensure economic, safe, and reliable pump ...
    • The Shortcomings Of Using Pump Suction Specific Speed Alone To Avoid Suction Recirculation Problems 
      Budris, Allan R. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1993)
      There is a mistaken belief in the pump industry (fueled by many publications) that the best way to avoid suction recirculation problems is to design and/or apply only pumps having low suction specific speed values (below ...
    • Sintered Alpha Silicon Carbide Pump Bearings - Tribological Materials Optimization To Improve Reliability 
      Knoch, Heinrich; Kracker, Josef; Long, William D. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1993)
      The material properties of sintered silicon carbide, such as universal corrosion resistance, hardness, strength, and thermal conductivity, offer a great potential as sealless pump bearings and mechanical seal faces. In ...
    • Table of Contents for the Proceedings of the 10th International Pump Users Symposium 
      International Pump Users Symposium (10th : 1993) (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1993)
    • Using Fault Trees To Determine The Root Cause Of Rotating Equipment Failures 
      Perez, Robert X. (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1993)
      The great value of using multidisciplinary task groups to conduct root cause failure analyses (RCFA) on pump and rotating equipment failures is discussed. The RCFA method offers its users a structured means of achieving ...
    • Vibration Problems With An Electric Motor For A Centrifugal Pump Installation 
      Wray, Lawrence (Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1993)
      A case history is presented in which vibration related problems with two pole electric motors have delayed acceptance of the complete pump packages by the end user. Noncompliance with contract specifications led to a major ...