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Hydraulically Rerating Centrifugal Pumps To Improve Reliability
(Texas A&M University. Turbomachinery Laboratories, 1998)
The authors present two case studies where improperly applied hydraulics resulted in poor mechanical reliability, due to chronic flow instability problems. A successful hydraulic rerate of these pumps, which required minimal ...
Experience In The Use Of Flexure Pivot Tilt Pad Bearings In Boiler Feed Water Pumps
(Texas A&M University. Turbomachinery Laboratories, 1998)
Boiler feedwater (BFW) pumps are among the most critical rotating equipment in power plants. The bearings in these pumps must be able to attenuate rotor vibrations and other hydraulic forces while still maintaining a high ...
Severe Suction Bell Damage In Large, Open Impeller, Vertical Turbine Pumps
(Texas A&M University. Turbomachinery Laboratories, 1998)
Sixteen (nine 1500 hp and seven 500 hp) single stage, vertical turbine, cooling water pumps suffered massive metal loss within two years of installation. All pumps had cast iron suction bells and semiopen, manganese bronze ...
Computer Simulation Of The Flowpath In Magnetic Sealless Pumps
(Texas A&M University. Turbomachinery Laboratories, 1998)
For applications that involved fluids with a high rate of change of vapor pressure or low specific heat, it was found that there could be inadequate flow through the thrust bearing. This effect was compounded by the heat ...
CFD Analysis Of A Double Suction Cooling Water Pump
(Texas A&M University. Turbomachinery Laboratories, 1998)
In 1991, four large double suction cooling pumps were installed at a chemical plant in Texas. Although these pumps met performance specifications on the test stand, they proved to be noisy when installed. Sound power levels ...
Using Fiber-Optic Pressure Sensors To Detect Cavitation And Flow Instabilities In Centrifugal Pumps
(Texas A&M University. Turbomachinery Laboratories, 1998)
This paper introduces the benefits of applying the fiber-optic Fabry-Perot interferometer (ffpi) pressure sensor as a means of detecting cavitation and flow instabilities in centrifugal pumps. The need for monitoring dynamic ...
Effects Of Entrained Air, NPSH Margin, And Suction Piping On Cavitation In Centrifugal Pumps
(Texas A&M University. Turbomachinery Laboratories, 1998)
Explanations and guidelines for the phenomena of cavitation noise above the NPSHR of a pump are presented, backed by laboratory and field tests. The hydraulic Institute Concepts of low, and very high suction energy, and ...
Cavitation Effects On Pump Thrust Leading To Bearing Failures
(Texas A&M University. Turbomachinery Laboratories, 1998)
As part of a major California refinery expansion project, a Delayed Coker was engineered with two heater charge pumps. Unfortunately, during the initial operations, both pumps failed within a few days of each other, causing ...
A New Method For Secondary Containment Of Emissions From Primary Seals
(Texas A&M University. Turbomachinery Laboratories, 1998)
Recent industrial advances in secondary containment methods have increased the role of secondary containment systems in environmental corporate strategies aimed at lowering the risks associated with leakage from primary ...
The Use Of Wavy Face Technology In Various Gas Seal Applications
(Texas A&M University. Turbomachinery Laboratories, 1998)
Wavy face technology in mechanical face seals is the use of circumferential waves manufactured into a seal face. This unique wavy shape is bidirectional, can be used in liquids, gases or combination, and incorporates a ...