Relevant bibliographies by topics / Ball valves

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Ball valves'

Author: Grafiati
Published: 4 June 2021
Last updated: 2 February 2022

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Journal articles on the topic "Ball valves"

1

Kozhukhar', E. V. "Production of ball valves." Chemical and Petroleum Engineering 33, no. 5 (September 1997): 542–44. http://dx.doi.org/10.1007/bf02416618.

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Dhanraj, Agre Virbhadra. "Experimental Analysis & Optimization with Validation of Ball Valve Body of WCB Material." International Journal for Research in Applied Science and Engineering Technology 9, no. VIII (August 15, 2021): 480–91. http://dx.doi.org/10.22214/ijraset.2021.37403.

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The ball valves are used in place of pipelines where the flow of fluid is needed. Ball valves have been mostly used for high temperature and high pressure valves which requires high quality products with confidentiality, reliability and durability. The ball has a bore or passage through the middle, so that when the port is in line with both ends of the valve, the flow of fluid will occur. When the valve is closed, the hole is perpendicular to the ends of the valve, and the flow is closed. The ball valve can revolve 90°, which has large size and weight, but it has not only an enormously more excellent confidentiality than other valves in the severely high temperature and high pressure environment When the ball valve is in closed condition the pressure exerted on the ball valve body due to that high pressure fatigue stresses and strain develop on the body of valve. Because of the high pressure and temperature on the ball valve body leakage of body take place which cause safety issue and ball valve failure. By this research stress strain analysis of ball valve body obtains and identifies the maximum and minimum stress and strain produced on the body of ball valve. The Max stress by parts was confirmed through thermal-structural coupled field analysis of major parts to evaluate safety. The objective of this research is to examine the effect of pressure and temperatures on valve components its analysis and optimization
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Nikitin, V. M., and E. L. Lezhnin. "Machining ceramic parts for ball valves." Chemical and Petroleum Engineering 26, no. 6 (June 1990): 327–29. http://dx.doi.org/10.1007/bf01156885.

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Huzzard, R. J., and S. Blackburn. "Process improvement in preparation of ball valves." British Ceramic Transactions 100, no. 2 (February 2001): 61–68. http://dx.doi.org/10.1179/096797801681215.

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Zimin, V. V. "Diamond honing of plugs for ball valves." Chemical and Petroleum Engineering 23, no. 4 (April 1987): 198–99. http://dx.doi.org/10.1007/bf01149346.

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Matyushin, E. G., L. A. Regush, A. Ya Boiko, and I. V. Semenov. "Calculation of polymer seals for ball valves." Chemical and Petroleum Engineering 21, no. 11 (November 1985): 529–31. http://dx.doi.org/10.1007/bf01149860.

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Kanno, Takahiro, Takashi Hasegawa, Tetsuro Miyazaki, Nobuyuki Yamamoto, Daisuke Haraguchi, and Kenji Kawashima. "Development of a Poppet-Type Pneumatic Servo Valve." Applied Sciences 8, no. 11 (October 31, 2018): 2094. http://dx.doi.org/10.3390/app8112094.

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In pneumatic positioning and force-control systems, spool-type servo valves are widely used for obtaining quick responses and precise control. However, air leakage from these valves results in increased energy consumption. To address this problem, we developed a three-port poppet-type servo valve to reduce air leakage. The developed valve consists of a camshaft, two orifices, two metal balls, and a housing with two flow channels. The metal ball is pushed by fluid, and spring force closes the orifice. The port opens when the cam rotates and pushes the ball. The cam shape and orifice size were designed to provide the desired flow rate. The specifications of the DC motor for rotating the camshaft were determined considering the fluid force on the ball. Static and dynamic characteristics of the valve were measured. We experimentally confirmed that air leakage was 0.1 L/min or less. The ratio of air leakage to maximum flow rate was only 0.37%. Dynamic characteristic measurements showed that the valve had a bandwidth of 30 Hz. The effectiveness of the valve was demonstrated through experiments involving pressure and position control.
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Yusof, N. S. B., Azmin Shakrine Mohd Rafie, M. K. A. Ariffin, and N. Othman. "Computational Analysis of the Groove Effect to Reduce the Cavitation in Ball Valves." Applied Mechanics and Materials 629 (October 2014): 414–19. http://dx.doi.org/10.4028/www.scientific.net/amm.629.414.

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Cavitation is a phenomenon that frequently creates fear within the engineering industry as the violent and critical attacks by cavitation can cause a lot of damage to ball valves. This paper is presented to reduce the risk of cavitation attack due to dramatic pressure drop and to demonstrate the ball valve performance. The ball valve with grooves was simulated and compared with current method under same boundary conditions as with existing experimental of ball valves. The proposed device can be operated in aircraft to isolate the fuel system and the engine fuel system after engine shutdown or emergency. The proposed implementation has successfully shown to eliminate the dramatic pressure drop effects to the ball valve. In the case study, at a closing angle of 40° at which violent cavitation occurs, the ball valve showed increasing cavitation intensity performance to 0.3 or 30%. The average performance of the cavitation index for all cases also increased to 24%.
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Mo, Chun Li, Xing Wei Tang, and Xu Ming Guo. "Analysis of CTOD Test for Proving Rings of Large-Scale Fully-Welded Ball Valves." Advanced Materials Research 295-297 (July 2011): 1142–45. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.1142.

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Fully-welded ball valves are widely used in the crude oil/natural gas transmission pipelines, and their quality has a direct bearing on the transportation safety of national energy. Two paralleled and symmetrical circular welds are used in the main welds of valve body, and the narrow-gap submerged arc welding (NG/SAW) is used in the welding groove. Because of conditional restrictions, it is impossible for the value to be post-weld heat treatment (PWHT). Therefore, the welds must have high impact toughness and strength. In order to study the welding performance of the base metal, SAW is used in the welding of proving rings of steel LF2 fully-welded ball valves. CTOD tests are applied to welding joints, and the result suggests that the minimum CTOD value of the valve’s welds and heat affected zone (HAZ) is more than 0.15mm. According to the criterion DNV-OS-C401, the welds in the fully-welded ball valve are safe enough without PWHT.
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Ma, Yi, Minjia Zhang, and Huashuai Luo. "Numerical and experimental studies of gas–liquid flow and pressure drop in multiphase pump valves." Science Progress 103, no. 3 (July 2020): 003685042094088. http://dx.doi.org/10.1177/0036850420940885.

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A numerical and experimental study was carried out to investigate the two-phase flow fields of the typical three valves used in the multiphase pumps. Under the gas volume fraction conditions in the range of 0%–100%, the three-dimensional steady and dynamic two-phase flow characteristics, pressure drops, and their multipliers of the ball valve, cone valve, and disk valve were studied, respectively, using Eulerian–Eulerian approach and dynamic grid technique in ANSYS FLUENT. In addition, a valve test system was built to verify the simulated results by the particle image velocimetry and pressure test. The flow coefficient CQ (about 0.989) of the disk valve is greater than those of the other valves (about 0.864) under the steady flow with a high Reynolds number. The two-phase pressure drops of the three valves fluctuate in different forms with the vibration of the cores during the dynamic opening. The two-phase multipliers of the fully opened ball valve are consistent with the predicted values of the Morris model, while those of the cone valve and disk valve had the smallest differences with the predicted values of the Chisholm model. Through the comprehensive analysis of the flow performance, pressure drop, and dynamic stability of the three pump valves, the disk valve is found to be more suitable for the multiphase pumps due to its smaller axial space, resistance loss, and better flow capacity.
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Dissertations / Theses on the topic "Ball valves"

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Rossetto, Diego Rizzotto. "Avaliação da integridade estrutural de projetos de válvulas do tipo esfera trunnion e/ou gaveta utilizadas nas instalações de petróleo." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/143311.

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Esta tese propõe avaliar a integridade estrutural de projetos de válvulas do tipo esfera trunnion e/ou gaveta. Por meio desta pesquisa, são avaliados os principais modos de falhas e parâmetros funcionais. Os estudos foram realizados utilizando a técnica dos elementos finitos e permitiram a construção de modelos para avaliar os seguintes modos de falha. (i) colapso estrutural dos principais componentes; (ii) vazamento na interface esfera/sede; (iii) travamento do sistema de acionamento devido à influência da vazão de escoamento do fluido. A avaliação da integridade estrutural é de fundamental importância para mitigar e/ou evitar erros, durante a fase de desenvolvimento de válvulas. Os modelos desenvolvidos também possibilitam o aprimoramento de novos projetos de válvulas e o aperfeiçoamento de projetos já desenvolvidos. O estudo proposto pode ser utilizado como indicador da qualidade de projeto de válvulas, auxiliando a equipe de desenvolvimento no dimensionamento de novos produtos, permitindo assim a avaliação dos requisitos funcionais e a avaliação da possível melhoria do projeto. Os resultados mostraram que o uso do método dos elementos finitos durante as fases iniciais do processo de desenvolvimento de válvulas é extremamente útil na concepção de novos produtos, permitindo a elaboração de produtos otimizados, sendo que por meio de um conhecimento multidisciplinar falhas prematuras podem ser detectadas nas fases iniciais do processo de desenvolvimento de projeto de válvulas, possibilitando com isso o desenvolvimento de um projeto mais racional com melhoria significativa de qualidade, confiabilidade, desempenho e competividade. O uso do método dos elementos finitos também possibilita uma redução do número de ensaios com protótipos físicos, o tempo de desenvolvimento e consequentemente o custo final do produto.
This thesis proposes to evaluate the structural integrity of the trunnion ball valves and/or gate. By means of this research, are evaluated main failure modes and functional parameters. The studies were conducted using the finite elements technique and allowed the construction of models to evaluate the following modes of failure. (i) structural collapse of the main components; (ii) leakage in the ball/seat interface; (iii) torque and/or locking of drive system due the influence of fluid flow rate. The evaluation of the integrity structural is of fundamental importance to mitigate and/or avoid errors, during the valve development phase. The models developed also enable the improvement de new valves design and the upgrade the valves design already developed. The proposed study can be used as an indicator the quality of valves design, assisting the development team in the design of new products, thus enabling the assessment of the functional requirements and evaluation of possible improvements in the design. The results showed that the use of finite element method during the early stage of valve development process is extremely useful in the conception the new products, allow to develop products optimized, and by means of a multidisciplinary knowledge premature failures can be detected in the early stages of the product design, besides enable the development of a design more rational with significant improvement in quality, reliability, performance and competitiveness. The use of finite element method also allows reduction the number of with physical prototype tests, time of development and the final cost of the product.
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Faccio, Mateus. "Avaliação de revestimento anticorrosivo orgânico aplicado em válvulas do tipo esfera para operações subsea." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/169775.

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Motivada pelos inúmeros desafios relacionados à exploração de petróleo na região do pré-sal, onde o ambiente agressivo aliado com a grande profundidade são fatores sempre presentes, a busca por materiais alternativos para aplicações em válvulas ganhou destaque. As válvulas subsea, essenciais para projetos de exploração nestas áreas são consideradas um desafio ainda maior. Dessa maneira, estudos e ensaios de desempenho em revestimentos anticorrosivos orgânicos nesse ambiente tornam-se necessários. O objetivo deste trabalho é avaliar a resistência à corrosão e ao desgaste do revestimento anticorrosivo orgânico ECTFE (Halar®) para a aplicação em válvulas industriais do tipo esfera para operações subsea, através da realização de ensaios em corpos de prova e em protótipos, perante as condições simuladas do ambiente agressivo na qual deverão operar em conformidade com o programa de qualificação do revestimento D-SMA/ING/SPF/TCNA-14-00047. Para a realização dos ensaios, foram projetados sistemas de tubulações fechadas (loopings), nos quais os protótipos foram instalados. Os parâmetros de testes estabelecidos, assim como os dados monitorados pelos sensores instalados, foram coletados durante todo o período de teste. Os ensaios definidos para a avaliação do revestimento orgânico em protótipos foram: ciclos de pressão, circulação sob vazão, circulação com água arenosa e ensaios de corrosão com e sem defeito imposto no revestimento. Complementarmente, corpos de prova em escala reduzida foram submetidos a ensaio de adesão e de fadiga. Os resultados obtidos foram conclusivos e o revestimento mostrou-se resistente às condições impostas aos protótipos, uma vez que não foram detectadas descontinuidades consideradas relevantes segundo os critérios de aceitação pré-estabelecidos em procedimento.
The search for alternative materials for applications in valves has been highlighted motivated by the numerous challenges related to oil and gas in the pre-salt region, where the aggressive environment combined with great depth are always present factors. The subsea valves, essential for exploration projects in these areas, are considered an even bigger challenge, thus, studies and performance tests on organic anti-corrosion coatings in this environment become necessary. The purpose of this study is to evaluate resistance to corrosion and wear of organic anti-corrosion coating ECTFE (Halar®) for application of industrial ball valves for subsea operations, by conducting tests on specimens and prototypes, under simulated harsh environment conditions in which they should operate in accordance with the coating qualification program D-SMA / ING / SPF / TCNA-14-00047. Closed pipes systems are designed (loops) for the carrying out of the tests, in which the prototypes were installed. The set of test parameters as well as the monitored data by installed sensors were collected during the entire test period. The defined tests for the evaluation of the organic coating in prototypes were: pressure cycles, flow rate circulation, circulation in soapy water and corrosion tests with and without defects imposed in the coating. In addition, reduced specimens were submitted to adhesion and fatigue tests. The results were conclusive and the coating was resistant to the imposed conditions on prototypes, since relevant discontinuities were not detected according to pre-established acceptance criteria for the procedure.
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Gomes, Kirk J. "Experimental High Speed Compressible Subsonic Flow Pressure Losses Across Gate, Butterfly and Ball Valves and Their Use in Natural Gas Transmission Flow Control Simulation Software." University of Toledo / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1301930298.

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Costa, Mauro Luís de Oliveira. "Estudo do torque de acionamento e vida útil de um projeto de válvulas industriais." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/21587.

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O objetivo principal deste trabalho é a análise e possível otimização de um projeto de válvulas de esfera. É apresentado um estudo para determinação do torque de acionamento de válvulas de esfera industriais, bem como um estudo de vida útil das válvulas. Os estudos foram realizados utilizando projeto de experimentos e permitiram a construção de modelos de previsão de torque e de previsão de vida útil. A previsão de torque é fundamental para possibilitar a otimização do projeto das válvulas, na fase de desenvolvimento do produto. O uso dos modelos permitiu a determinação do ajuste ótimo, levando em conta pressão, temperatura, esmagamento das sedes, torque de aperto na porca da haste e torque de acionamento desejado. Já os estudos de vida útil são importantes para informar à empresa o número de ciclos até o vazamento. Os resultados do estudo, realizado através de ensaios acelerados, permitiram a construção de modelos de confiabilidade associada ao número de ciclos de operação, permitindo assim a avaliação e possível melhoria do projeto das válvulas.
The main objective of this dissertation is the analysis and optimization of a ball valve project. A study for determining the operational torque of industrial ball valves as well as a life study of valves are presented. The studies were performed using design of experiments and allowed the construction of torque and life prevision models. The prevision of torque is fundamental to enable project optimization on the phase of product development. Results allowed the definition of an optimal setting regarding pressure, temperature, seats tightening, stem nut tightening torque and the desired operational torque. Further, the life studies are helpful to inform the company the number of cycles until leakage. Results, obtained through accelerated tests, allowed the construction of reliability models associated to the number of operational cycles, conducting to valve design evaluation and optimization.
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Peloza, Michael Anthony. "Basketball dribbling performance: Differences between using one ball or two balls." CSUSB ScholarWorks, 1998. https://scholarworks.lib.csusb.edu/etd-project/1445.

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Steiner, Paul Frederick Jr 1938. "Modern ball-banking limiting values." Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/291520.

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In 1940 R. A. Moyer and D. S. Berry established ball-banking limiting values (and side friction factors) for use in determining the maximum recommended speed of horizontal curves on roads (the value shown on advisory speed plates). This speed is also referred to as the "advisory speed", "safe speed", or the "comfortable speed" of the curve. This speed is distinguished from the "critical curve speed", the speed value at which loss of control is imminent. Literature review showed some concern for the criteria for the installation of curve warning signs but no recent concern for the goodness of the limiting values. Ritchie et. al. has provided updated research on lateral acceleration values. Their research, plus results of this study, show that the 1940 values are outdated. This work concludes with recommended modern ball-banking limiting values, side friction factors, and lateral acceleration values. Recommendations regarding further research are stated.
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Roberts, Andrew Philip. "Modelling and Experimental Investigation into the Performance of a Ball Valve from an Aircraft Fuel System." Thesis, University of Bath, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.518099.

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The performance of an aircraft fuel system ball valve has been assessed using various modelling techniques and experimental methods. The performance largely splits into two parts. The first part deals with the steady state characteristics and internal flow field for fixed valve positions. The second part looks at the dynamic performance of pressure surge and flow overshoot by closing the valve using a linear profile. For the steady state flow, a 3D CFO model was used to characterize the flow coefficient to within 10% of the measured data. The variation of the flow coefficient with angle is largely dominated by viscous effects, pressure recovery and jet contraction in that order with increasing angle. An accurate and efficient 20 model of the flow coefficient used 1/12th of the computing time of the equivalent 3D model. The 20 model was then used to look at the effect of orifice radius and it was shown that the Coanda effect has little influence on the trend in the flow coefficient. Following this, a steady state CFO model was used to predict the maximum velocity from LOV data to within 12.5%. With the LOV measurements, the presence of shear layers in the flow field creates jet contraction and is a possible source of cavitation. For the dynamic flows, a method for determining the valve fluid inertance was presented, which followed an analogy between a porous medium and the valve fluid inertance. However, the effect of this inertance on the measured pressure surge was small due to the small percentage of the total system fluid inertance that the valve fluid inertance represents. For flow rate measurement, the two transducer technique isproposed and this method is an accurate post processing technique and can predict overshoot to within less than 2% of the modelled valve. A curve fitting method was also used to characterize the surge pressure and volume overshoot across a range of test conditions, the characterized surge pressure being within 6% of the measured values.
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Bujáková, Veronika. "Rozvoj marketingového mixu prodejny BALA." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2017. http://www.nusl.cz/ntk/nusl-318612.

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This diploma thesis proposes a design on improvement of the level of current marketing mix in a selected bussines. First part is devoted to marketing theoretical knowledge describing its individual tools. Second part is practical and it focuses on analysing the current marketing mix, internal and external environment of the bussines. In the conclusion, a proposal of possible improvement of the marketing mix is drawn based on the analytical part.
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Lentz, Robert Dowling 1976. "Optimization of a pin-and-slot ball valve linkage : with application to wireline cutting in downhole oil well tools." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80656.

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Kryštof, Ondřej. "Bezpečnost automatizovaných průmyslových armatur v provozních podmínkách." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254356.

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Choosing suitable and safe valve with accessories depends on general specifications for plant. Using valve for on/off, throttling, back-flow prevention, etc., pressure drop is related with Kv value or leakages from piping systems are main factors for properly valve selection. Valve have to resist chemicals and substances that may change the state, temperature and its fluctuation, pressure, corrosion and erosion. This properties determine pressure class, temperature resistance, connection into pipe and sealing material as gland packing, seats, seal between flange etc. This and other specification, listed in this thesis, can help determine suitable type of valve. This thesis deals construction design of valve and accessories as well. The last chapters are focused on calculation of safety valve and selection safe and appropriate control valve with accessories.
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Books on the topic "Ball valves"

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Maddox, Jake. Off the bench: Wildcats B-ball. Minneapolis, Minn: Stone Arch Books, 2010.

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I. G. N. Arinton Puja. Nilai-nilai budaya Bali dalam pertunjukan tari Cakepung. Edited by Seraya I. Made, Mayun Ida Bagus, Purna I. Made, and Proyek Penelitian dan Pengkajian Kebudayaan Nusantara (Indonesia). [Jakarta]: Departemen Pendidikan dan Kebudayaan, Direktorat Jenderal Kebudayaan, Direktorat Sejarah dan Nilai Tradisional, Proyek Penelitian dan Pengkajian Kebudayaan Nusantara, 1991.

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Bowman, Timothy Dale. Effects of the Exxon Valdez oil spill on bald eagles. [Anchorage, AK: U.S. Fish and Wildlife Service, 1993.

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Bowman, Timothy Dale. Effects of the Exxon Valdez oil spill on bald eagles. [Anchorage, AK: U.S. Fish and Wildlife Service, 1993.

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Bowman, Timothy Dale. Effects of the Exxon Valdez oil spill on bald eagles. [Anchorage, AK: U.S. Fish and Wildlife Service, 1993.

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George, Matheson. The Vaders' caboose: Stories of a railroad family, the Vaders, who worked on the greatest ball-buster of them all, the Kettle Valley Railway of British Columbia. Lumby, B.C., Canada: Kettle Valley Publishers, 1994.

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i suck cock for crack change mo fucka, ed. my ass my dick, balls, shit, piss, cunt, clit, gooch: DICK. Washington, D.C: National Academies Press, 2012.

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Awesome Super Nintendo Secrets 2. Lahaina, USA: Sandwich Islands Publishing, 1993.

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Mcdermott, Leeanne. GamePro Presents: Sega Genesis Games Secrets: Greatest Tips. Rocklin: Prima Publishing, 1992.

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Tom, Badgett, ed. Official Sega Genesis and Game Gear strategies, 2ND Edition. Toronto: Bantam Books, 1991.

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Book chapters on the topic "Ball valves"

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Rose, Alan G. "Caged-ball Valves." In Pathology of Heart Valve Replacement, 46–65. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3227-2_4.

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Braic, V. T., M. T. Braic, M. Popescu, and C. D. Melinte. "TiN as Protective Coating for Ball-Valves in Oil Pumping Systems." In Protective Coatings and Thin Films, 367–74. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5644-8_29.

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Egure-Hidalgo, M., J. M. Aburto-Barrera, C. R. Torres-San Miguel, J. Martinez-Reyes, and B. Romero-Ángeles. "Structural Analysis by Finite Element Method in Ball Valves to Improve Their Mechanical Properties." In Advanced Structured Materials, 175–85. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20801-1_13.

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Chernov, N. "Entropy Values and Entropy Bounds." In Hard Ball Systems and the Lorentz Gas, 121–43. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-662-04062-1_6.

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Holzapfel, Rolf-Peter. "Algebraic Values of Picard Modular Theta Functions." In The Ball and Some Hilbert Problems, 65–100. Basel: Birkhäuser Basel, 1995. http://dx.doi.org/10.1007/978-3-0348-9051-9_4.

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Holzapfel, Rolf-Peter. "Transcendental Values of Picard Modular Theta Constants." In The Ball and Some Hilbert Problems, 101–18. Basel: Birkhäuser Basel, 1995. http://dx.doi.org/10.1007/978-3-0348-9051-9_5.

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Pluth, James R. "Clinical Experience with the Caged-Ball STARR-EDWARDS® Prosthesis." In Cardiac Valve Replacement, 37–40. Boston, MA: Springer US, 1985. http://dx.doi.org/10.1007/978-1-4613-2601-4_6.

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Oh, Kwang W., Rong Rong, and Chong H. Ahn. "In-Line Micro Ball Valve Through Polymer Tubing." In Micro Total Analysis Systems 2001, 407–8. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-1015-3_179.

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Krusemark, O., A. Feustel, and J. Müller. "Micro Ball Valve for Fluidic Micropumps and Gases." In Micro Total Analysis Systems ’98, 399–402. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5286-0_95.

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Dinesh Kumar, G., K. S. Karthikeyan, and C. Sathishkumar. "Study and Testing of Pneumatic Control of Ball Valve Using Actuator." In Springer Proceedings in Materials, 1199–211. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8319-3_120.

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Conference papers on the topic "Ball valves"

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Rouss, Gino James, and William S. Janna. "Determination of Discharge Coefficient for Ball Valves With Calibrated Inserts." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59269.

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The valve coefficient was measured for 1, 1-1/4, 1-1/2 and 2 nominal ball valves. A recently designed orifice insert was used with these valves to obtain smaller valve coefficients. Orifice inserts were threaded into the body of a ball valve just upstream of the ball itself. The valve coefficient was measured for every insert used with these valves, and an expression was determined to relate the orifice diameter to other pertinent flow parameters. Two dimensionless groups were chosen to correlate the collected data, and expressions were developed that can be used as aids in sizing the orifice insert needed to obtain the desired valve coefficient. The study has shown that a 2nd order polynomial equation as well as a power law equation can both be used to predict the desired results. Knowing pipe size and schedule, the diameter of the orifice insert needed to obtain the required valve coefficient can be approximated with minimum error. An error analysis performed on the collected data shows that the results are highly accurate, and that the experimental process is repeatable.
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Rouss, Gino James, and William S. Janna. "Determination of Discharge Coefficient for Ball Valves With Calibrated Inserts." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-41043.

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The valve coefficient was measured for 1/2-, 3/4- and 1 nominal ball valves. It was desired to use a recently designed orifice insert with these valves to obtain smaller valve coefficients. Orifice inserts were placed into the body of a threaded ball valve just upstream of the spherical control element. The valve coefficient was measured for each insert, and an expression was determined to relate the orifice diameter to other pertinent flow parameters. Two groups were chosen to correlate the collected data, and a graph was developed. These results can be used as an aid in sizing the orifice insert needed to obtain the desired valve coefficient. The study has shown that a two parameter power law equation can be used as an aid in predicting the desired results. Knowing pipe size and schedule, the diameter of the orifice insert needed to obtain the desired valve coefficient can be approximated with minimum error. An error analysis performed on the collected data shows that the results are highly accurate, and that the experimental process is repeatable.
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Branda˜o, M. O., and T. A. Netto. "Sealing Analysis of Metallic Interfaces Applied to Shutdown Ball Valves." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79151.

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This paper presents rough metallic surface contact analysis focusing on the sealing mechanism in metallic interfaces of subsea shut down ball valves. The work is divided in two parts: initially, the actual rough metallic sealing surface of a ball valve is measured and evaluated by using an atomic force microscope (AFM). The surface is modeled using the finite element method in order to estimate the load to cause the plastic deformation needed for proper sealing. Then a case study is carried out to compare the effectiveness of combined sealing (rubber and metal) and metal-to-metal sealing. Based on the experimental measurements and numerical results, some manufacturing procedures for increasing the reliability of a metal-to-metal sealing in shut-down ball valves are presented.
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Baugh, B. F., and W. S. Tillinghast. "Systems for ROV Actuation and Repair of Pipeline Ball Valves." In Offshore Technology Conference. Offshore Technology Conference, 1990. http://dx.doi.org/10.4043/6353-ms.

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Manzanas, Carlos, Xiao Jiang, John A. Lednicky, and Z. Hugh Fan. "Development of Ball-Enabled Miniaturized Valves for Sample Preparation and Microheaters for Pathogen Detection." In ASME 2020 Fluids Engineering Division Summer Meeting collocated with the ASME 2020 Heat Transfer Summer Conference and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/fedsm2020-20379.

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Abstract There have been numerous Zika virus (ZIKV) outbreaks in the past few years, representing a public health problem. The recommended tests for the diagnosis of Zika infections are performed in a laboratory setting. However, diagnostics platforms at the point-of-care (POC) are highly desirable for understanding and preventing ZIKV transmission. To address this need, we have developed a testing platform that (1) can be operated in the field for pathogen detection, (2) is rapid, cost-effective, and reliable, and (3) does not require a power supply. To realize the platform, we have developed (1) a series of ball-based valves for the storage and sequential delivery of reagents and (2) microheater-enabled RNA amplification, both of which are integral components of this POC device. The multiple reagents are needed for virus lysis, RNA enrichment and purification. These ball-based are employed for fluid-control and they are actuated manually by sliding the unit and a pole under it, which can lift the balls. Nucleic acid amplification is then performed by a smart coffee mug that provides a constant temperature for reverse transcription loop mediated isothermal amplification (RT-LAMP), followed by colorimetric detection. We have demonstrated the detection of Zika virus in human urine and saliva samples using this testing platform.
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Ferrara, Marco, and Sergio Casaroli. "The Benefit of Replacing Rising Stem Ball Valves with Triple Offset Valves in Natural Gas Molecular Sieve Applications." In Offshore Technology Conference. Offshore Technology Conference, 2018. http://dx.doi.org/10.4043/28682-ms.

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Jiang, Lei-Yong, Keith Depooter, and William Carscallen. "Flow Field in the Vicinity of a High-Pressure-Drop Ball Valve." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15711.

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The testing of gas turbine combustors requires large flow rates at high pressures and elevated temperatures. In order to control the flow and pressure inside the combustor, some type of control valve is required in the exhaust section of the testing system. This backpressure valve is exposed to severe operating conditions. To understand the complex flow features in the exhaust section and provide relevant information for selecting suitable low-cost valves for new large test cells, a numerical study was carried out on a backpressure valve that has been used in a number of testing programs. The flow fields in the vicinity of the valve and the piping sections ending at the exhaust stack were resolved for three practical operating conditions. The results indicate that because of the presence of the valve with a V-shape opening, the flow field behind experiences a series of three-dimensional expansion and shock waves. The strong interactions exist between the flow behind the blockage and the flow passing through the opening area. More importantly, it is found that most of the pressure drop occurs immediately downstream of the valve, and its values are much larger than those provided by suppliers based on shock-free flow calculation. This may explain why the valve lost its function during testing and its stainless-steel seat had to be removed in order to maintain its rotational function. Based on this study, it is recommended that a second pressure-drop element be installed in the exhaust section in order to keep the expected lifetime of valves and reduce noise level. This suggestion has been implemented in the new large test cell at the Gas Turbine Laboratory.
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Hashemi, Saeed, Hannah Mitchell, and William K. Durfee. "Experimentally Validated Models for Switching Energy of Low Pressure Drop Digital Valves for Lightweight Portable Hydraulic Robots." In ASME/BATH 2019 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/fpmc2019-1651.

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Abstract The most critical factors for a switching valve in a lightweight, portable hydraulic systems are low pressure drop, low power consumption, fast response time, and small size and weight. In this paper, experimentally validated models are proposed for switching energy required by two valve architectures with minimum pressure drop (ball and butterfly valves). The orifice in a hydraulic valve creates a pressure drop across the valve that needs to be minimized especially for low-pressure passive applications. The ideal switching valve for a hydraulic device is one with an opening diameter that is the same as the hose diameter. Several valve architectures with low pressure drop can be motorized to be used as a digital valve. The valve operation mechanism determines the power consumption of the valve. In this paper, the energy to switch state was modeled for two rotary valve types: butterfly and ball. The model was being used to find the best valve configuration for low-pressure digital hydraulics. The model was validated through experiments on a low-pressure ball valve, a high-pressure ball valve, and a low-pressure butterfly valve. The butterfly valve has the lowest switching energy for the same geometry; however, this valve has a small pressure drop due to the presence of the disc in the open position. We conclude that either ball or butterfly valves are suitable for low-pressure, small-scale hydraulic applications.
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Kim, G. E., T. A. Brzezinski, L. Leblanc, and E. Kharlanova. "Thermal Spray Coatings for Ball Valves Used in Nickel/Cobalt Pressure Acid Leaching." In ITSC 2000, edited by Christopher C. Berndt. ASM International, 2000. http://dx.doi.org/10.31399/asm.cp.itsc2000p1149.

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Abstract Pressure acid leaching (PAL) of lateritic nickel ores requires the use of extremely severe processing conditions (250 °C, > 4000 kPa, 98 % H2SO4). In addition to the severe corrosive nature of the acid solution, up to 30% of abrasive solids are present in the slurry. PyroGenesis Inc. has applied its expertise in materials science and thermal spray technologies into developing and commercially applying coatings for the protection of ball valve components used in PAL autoclaves. Vacuum plasma spray (VPS) and atmospheric plasma spray (APS) processes are used to apply coatings of metals and ceramics for corrosion and wear resistance, respectively. A comparative study on the microstructure and mechanical properties of different coatings, applied with the two processes, will be presented. Although APS coatings provide enhanced abrasive resistance, VPS coatings have shown the potential for superior properties. The extreme temperatures and pressures associated with the actual PAL conditions are too severe to simulate in laboratory conditions, hence, corrosion testing was not possible. Microstructural analysis, microhardness, adhesion, and abrasion testing were determined for each coating/processing combination.
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Blome, Matthias, and Stefan Rueckriem. "Optimization of High Pressure Components for LDPE Manufacturing." In ASME 2016 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/pvp2016-63480.

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Coned and threaded type connection valves, fittings and tubing up to sizes of 9/16” are typical high pressure components used on the initiator injection system of a Low Density Polyethylene LDPE facility. The process pressures of up to 360 MPa (52,200 psi) on the reactor side require even higher pressures on the initiator injection lines. Based on the differential pressures and the challenging environment 414 MPa (60,000 psi) has been defined as an appropriate pressure rating for such components. Valves, fittings and tubing with this pressure rating are more or less standardized and available from multiple sources on the market. However, the technical challenges in designing and manufacturing components for this duty are sometimes under-estimated and design improvements can lead to a higher process safety and a reduced downtime. This paper covers the design requirements and has a specific focus on a filter with screwed element and a check valve with ceramic ball. The majority of high pressure in-line filters on the market have a sintered element that is press-fitted into the filter body. This design has some disadvantages in case of fast depressurizations as they occur when a safety valve or a rupture disk blows off. The sudden differential pressure may cause the element to move inside the body, and this can be accompanied by cracking of the element. Parts of the broken sintered element are a risk to the process since they would move downstream followed by a contamination of the reactor. A new generation of such filters with screw-in elements was designed and tested. The R&D work resulted in an extended element that fits into a modified filter body with standard outside dimensions. Before performing a field test at a LDPE plant three prototype samples went through intensive testing at the manufacturer’s facilities. Check valves are typical components used in order to maintain the flow in one direction. For liquids the metal to metal sealing ball type is the most common. Since the process pressure exposes the mating parts — ball and orifice — to high compression forces, imprints and marks on the ball surface are sometimes experienced. The material of these types of balls is typically bearing steel which has high mechanical strength but limited corrosion resistance. In order to improve the cycle life of high pressure ball check valves alternative materials were looked at. During the further product improvement a check valve with ceramic ball was designed and lab tested at the manufacturer’s facilities.
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Reports on the topic "Ball valves"

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MISKA, C. R. Whitey SCHe Ball Valves Provide Test Port Isolation. Office of Scientific and Technical Information (OSTI), October 2000. http://dx.doi.org/10.2172/805407.

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MISKA, C. R. Whitey SCHe Ball Valves Provide Test Port Isolation. Office of Scientific and Technical Information (OSTI), September 2000. http://dx.doi.org/10.2172/804829.

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MISKA, C. R. Whitey SCHe Ball Valves Provide Test Port Isolation. Office of Scientific and Technical Information (OSTI), September 2000. http://dx.doi.org/10.2172/804830.

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VAN KATWIJK, C. Whitey SCHe Ball Valves Provide Test Port Isolation. Office of Scientific and Technical Information (OSTI), August 1999. http://dx.doi.org/10.2172/797753.

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VAN KATWIJK, C. Worcester ball TW cask manual valves, TW-V*021, *027. Office of Scientific and Technical Information (OSTI), July 1999. http://dx.doi.org/10.2172/797534.

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NUXALL, T. A. Worcester Ball TW Cask Manual Fill Valves TW-V-*021 and TW-V-*027. Office of Scientific and Technical Information (OSTI), May 1999. http://dx.doi.org/10.2172/798066.

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MISKA, C. R. Whitey Swagelok SCHe Ball Valves Provide Isolation between SCHe Purge Lines C and D and the Process Vent. Office of Scientific and Technical Information (OSTI), October 2000. http://dx.doi.org/10.2172/805408.

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MISKA, C. R. Whitey Swagelok SCHe ball valves Provide Isolation between SCHe Purge Lines C and D and the Process Vent. Office of Scientific and Technical Information (OSTI), September 2000. http://dx.doi.org/10.2172/804831.

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MISKA, C. R. Whitey Swagelok SCHe Ball Valves Provide Isolation between SCHe Purge Lines C and D and the Process Vent. Office of Scientific and Technical Information (OSTI), September 2000. http://dx.doi.org/10.2172/804832.

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VAN KATWIJK, C. Whitey Swagelok SCHe Ball Valves Provide Isolation between SCHe Purge Lines C and D and the Process Vent. Office of Scientific and Technical Information (OSTI), August 1999. http://dx.doi.org/10.2172/797754.

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