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Using engineered composite materials in sealless magnetic drive pumps to eliminate eddy currents and improve reliability
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
Background - Pump application: This case study is based on an application supplied into a Polysilicon production facility. The purpose of the application is to pump Trichlorosilane (TCS) liquid into the production process ...
Thermal Load Effect on Vibration on a Reactor Feed Water Pump (FWP)
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
The Influence of Impeller Wear Ring Geometry on Suction Performance
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
Wear rings are a necessary feature of an enclosed centrifugal impeller design. The purpose of the wear ring is to limit the leakage of fluid from the high pressure zone at the impeller outlet to the low pressure region at ...
Eliminating Damage of Retaining Rings by Using Redesigned "Profiled" Keys
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
Retaining rings are used to locate pump impellers axially on the shafts of high speed, high pressure Siemens Delaval boiler feed pumps. Upon repairing and refurbishing the inner barrels, the retaining rings were found to ...
Barrier And Buffer Fluid Selection And Considerations For Mechanical Seals
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
The increased use of pressurized and non-pressurized dual mechanical seals has driven more installations to require the use of barrier and buffer fluids. While some end users have viewed the selection of barrier fluids as ...
High Vibration Analysis of Eddy Current Drum Coupled Motor to a Vertical Centrifugal Pump : Solution Based on EMA, ODS and FEA
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
The 35-year old pump station moves up to 43 MGD of raw wastewater to the city’s treatment facility via two 1,500-hp high-capacity pumps for wet weather flows. After the motors were refurbished in 2011, excessive motor ...
Development Of A Noncontacting Seal For Gas/Liquid Applications Using Wavy Face Technology
(Texas A&M University. Turbomachinery Laboratories, 1996)
A seal has been developed and tested that incorporates a circumferential wave pattern with a sealing dam formed on a SiC face, using a proprietary process. When run against a flat carbon face, laboratory tests show that ...
Determination Of NPSHR For Reciprocating Positive Displacement Pumps - A New Approach
(Texas A&M University. Turbomachinery Laboratories, 1996)
NPSHR is a significant pump characteristic; it is often taken as a measure of minimum suction head needed to operate a pump satisfactorily. Hydraulic institute, among others, specifies a measurement of procedure for NPSHR, ...
Centrifugal Pump Vibration Caused By Supersynchronous Shaft Instability
(Texas A&M University. Turbomachinery Laboratories, 1996)
Many centrifugal pump vibration problems are due to synchronous phenomena such as vane-pass frequency energy and running speed energy. To address such problems, guidelines have been developed to assist with their identification ...
ASME B73.1m Pump Reliability Program Formation - A Data Based Approach
(Texas A&M University. Turbomachinery Laboratories, 1996)
Data are being used to determine business decisions in this day of competitive business. In years past, many business decisions have been made without the data to support them. Today, with the use of new computer programs, ...