Offset disc butterfly valve design

2014 ◽  
Vol 1 (08) ◽  
Keyword(s):  
Butterfly Valve ◽  
Valve Design

New butterfly valve design

Metallurgist ◽  
1957 ◽  
Vol 1 (2) ◽  
pp. 113-114
Author(s):  
I. B. Goldenberg ◽  
E. I. Dikshtein
Keyword(s):  
Butterfly Valve ◽  
Valve Design

Study on Hydrodynamic Torque of a Butterfly Valve

2005 ◽  
Vol 128 (1) ◽  
pp. 190-195 ◽  
Author(s):  
Ju Yeop Park ◽  
Myung Kyoon Chung
Keyword(s):  
Iterative Scheme ◽  
Three Dimensional ◽  
Physical Reality ◽  
Two Dimensional ◽  
Butterfly Valve ◽  
Valve Design ◽  
Conventional Model ◽  
Torque Coefficient ◽  
Theoretical Results ◽  
Valve Model

Since knowledge on hydrodynamic torque of a butterfly valve is very important for butterfly valve design, its hydrodynamic torque is investigated theoretically. For this, a recently developed two-dimensional butterfly valve model is solved through the free-streamline theory with a newly devised iterative scheme and the resulting two-and three-dimensional torque coefficients are compared with previous theoretical results based on the conventional butterfly valve model and experiments. Comparison shows that the improvement due to the new butterfly valve model is marginal. That is, the three-dimensional torque coefficient is well represented by the new model. Otherwise, the two-dimensional torque coefficient is well predicted by the conventional model. In spite this fact, the present results can be used in further researches on butterfly valves because the improved butterfly valve model is mathematically correct and reflects physical reality more correctly than the conventional valve model.

Study of Hydrodynamic Torque of Double Offset Butterfly Valve Disc through Experiment and CFD Analysis

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Prakash S. a, and Naragund ◽  
Veeranna B. Nasi ◽  
Girish V. Kulkarni
Keyword(s):  
Control Valve ◽  
Control Device ◽  
Butterfly Valve ◽  
Valve Design ◽  
Optimum Selection ◽  
Dynamic Forces ◽  
Valve Disc ◽  
Computational Fluid Dynamics Cfd ◽  
Opening And Closing ◽  
Selection Of

A butterfly valve is commonly used as control device in applications where the inlet velocity is high and the pressure drop required is relatively low. Hydrodynamic torque is a significant design parameter for engineers dealing with control valve design. Predicting the hydrodynamic torque for all opening and closing conditions in rotary valves is of utmost importance. This study sought to compare experimental and simulated computational fluid dynamics (CFD) performance factor and hydrodynamic torque of 150mm double offset butterfly disc for various opening and closing angles in the increments of 100. In general, as the flow rate increases through the valve, greater force is exerted upon the disc by the fluid. These increased dynamic forces require more torque to rotate the disc. The amount of torque required to rotate the disc during operation varies depending on type of fluid flowing through the valve, velocity, shape and position of the disc. Finally a correlation has been established between the experiment and CFD values and valve industry can make use of this data for optimum selection of gear box and actuator.

Three-Dimensional Analysis of Partially Open Butterfly Valve Flows

1996 ◽  
Vol 118 (3) ◽  
pp. 562-568 ◽  
Author(s):  
Chendong Huang ◽  
Rhyn H. Kim
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Flow Field ◽  
Dimensional Analysis ◽  
Three Dimensional ◽  
Fluid Flows ◽  
Butterfly Valve ◽  
Valve Design ◽  
Incompressible Fluid Flows ◽  
Physical Phenomena

A numerical simulation of butterfly valve flows is a useful technique to investigate the physical phenomena of the flow field. A three-dimensional numerical analysis was carried out on incompressible fluid flows in a butterfly valve by using FLUENT, which solves difference equations. Characteristics of the butterfly valve flows at different valve disk angles with a uniform incoming velocity were investigated. Comparisons of FLUENT results with other results, i.e., experimental results, were made to determine the accuracy of the employed method. Results of the three-dimensional analysis may be useful in the valve design.

Visualization of Flashing Phenomena around a Butterfly Valve

1985 ◽  
Vol 5 (Supplement) ◽  
pp. 15-18
Author(s):  
Takeyoshi KIMURA ◽  
Kazuhiko OGAWA
Keyword(s):  
Butterfly Valve

T-Pouch: A New Valve Design for a Continent Ileostomy

2002 ◽  
Vol 45 (3) ◽  
pp. 411-415 ◽  
Author(s):  
Andreas M. Kaiser ◽  
John P. Stein ◽  
Robert W. Beart
Keyword(s):  
Continent Ileostomy ◽  
Valve Design

Weak-Link Analysis of Motor-Operated Butterfly Valve

2002 ◽  
Author(s):  
Donghae Kim
Keyword(s):  
Structural Integrity ◽  
Weak Link ◽  
Link Analysis ◽  
Seismic Load ◽  
Seismic Loads ◽  
Static Force ◽  
Bending Stress ◽  
Butterfly Valve ◽  
Load Path ◽  
Valve Assembly

The purpose of this paper is to address the structural integrity of the motor operated butterfly valve assembly by providing the methodology and equations to quantitatively determine the permissible component load in the load path from the operator to the valve. The weak link analysis is to determine the maximum allowable torque on the butterfly valve by equating the stresses caused by the torque and seismic load with the appropriate allowable stress value, and then the unknown torque is solved. Analysis methods are based on classical static force balancing equations and on classical axial, shear, and bending stress equations using the worst possible load combinations including seismic loads resulting from design basis earthquake.

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