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Computational Fluid Dynamical Analysis Of Complex Internal Flows In Centrifugal Pumps
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1994)
A commercial computational fluid dynamics (CFD) computer code was employed to compute the flow field from 105 percent down to 21 percent of the 4525 gpm BEP flowrate of a 1785 rpm, 1500 specific speed impeller of 14,000 ...
Positive Displacement Pumps - Performance And Application
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1994)
The operating principles of positive displacement (PD) pumps differ from centrifugal pumps. This basic difference is evident in the pump’s response to a system’s head/flow curve. Several pump applications are presented to ...
The Development Of Low Friction, Low Leakage Mechanical Seals Using Laser Technology
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1994)
An ideal mechanical seal would operate reliably, for long periods, without wear, with permanently low friction and extremely low leakage. Real mechanical seals often do wear and leak appreciably, however, particularly when ...
Oil Mist Lubrication For The Petrochemical Industry
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1994)
Oil Mist lubrication has been shown to be a very effective method for reducing maintenance costs by minimizing lubrication related bearing failures. What oil mist is, how it works, and typical results from its application ...
Analysis And Testing Of Alternative Bearings Materials For Applications In Sealless Pumps
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1994)
As the usage of sealless pumps increases, so do the demands for journal bearing materials that can operate successfully through the thermal upsets that can take place in these pumps. Material specification literature is ...
The Role Of Off-Design Pump Operation On Mechanical Seal Performance
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1994)
Field experience indicates that a high percentage of centrifugal pumps in industrial applications are not operated at their best efficiency point as related to product flow. Dry running, gas ingestion, vibration, cavitation, ...
CMA/STLE Pump Seal Mass Emissions Study
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1994)
The Chemical Manufacturers Association and the Society of Tribologists and Lubrication Engineers conducted a study of the leak rates from pumps equipped with mechanical seals. The resulting analysis indicates that attention ...
Composite Pumps
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1994)
Design And Development Of Gas Lubricated Seals For Pumps
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1994)
Gas lubricated double seals are becoming more common in industry for pump applications where product emission, product contamination, and operating costs are a concern. Technology proven on large gas compressors is not ...
How To Avoid Building Problems Into Pumping Systems
(Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University, 1994)
A poorly performing pump frequently exhibits both hydraulic and mechanical problems. Excessive noise, vibration, degradation of discharge pressure, repeated bearing failures, and sometimes impeller breakage lead to high ...