The main objective of this project is shape optimization and structural stability the butterfly valve for metallic nonmetallic materials mostly used in engine carburetors need to make plays role component, design modifications material comparative analysis done ANSYS Structural modules find optimized through stress, strain deformation results

s spring In some nuclear reactor containment isolation applica­ Greek tions, butterfly valves with pneumatic actuators are used to close pipelines in the event of containment p density pressure transients resulting from postulated acci­ e angular position dents. A model is developed which predicts the closure time history of such valve/actuator systems INTRODUCTION under prescribed transients. ...

Methods We present a retrospective study on 120 cases with degenerative mitral regurgitation in which surgical mitral reconstruction has been tried in the last 5 years. 29 Barlow diseases, 50 FED, 20 idiopathic calcification of PML. Preoperative echographic and intraoperative valve analysis reveals risks factors for SAM; small LV, bulging septum, redundant leaflets, reduced mitro aortic angle, ...

Mitral valve repair is currently considered the standard treatment for mitral regurgitation. Posterior leaflet prolapse has been treated by quadrangular resection and ring annuloplasty for many years. Although it is a classic and reproducible method, this technique may predispose to systolic anterior motion (SAM) of the anterior leaflet of the mitral valve. The incidence of SAM has been reporte...

The throttle is a component that determines the amount of airflow into combustion chamber. latest in-vehicle technology makes it possible to adjust fly valve electronically. electronic system adjusts angle size by comparing predetermined setpoints. In research, designs are based on existing models. model uses stepper motor drive. Electronic control using microcontroller with proportional-integr...

We have performed a shape optimization of the disc in an industrial double-eccentric butterfly valve using the effect analysis of design variables to enhance the valve performance. For the optimization, we select three performance quantities such as pressure drop, maximum stress, and mass (weight) as the responses and three dimensions regarding the disc shape as the design variables. Subsequent...