Since knowledge on hydrodynamic torque of a butterfly valve is very important for butterfly valve design, its hydrodynamic torque is investigated in this paper. In reality, the investigation of the loss coefficient and torque from some experiments will take a long time and a lot of money. This paper presents a statistical study of the flow past the butterfly valve in a static analysis using com...

since knowledge on hydrodynamic torque of a butterfly valve is very important for butterfly valve design, its hydrodynamic torque is investigated in this paper. in reality, the investigation of the loss coefficient and torque from some experiments will take a long time and a lot of money. this paper presents a statistical study of the flow past the butterfly valve in a static analysis using com...

Butterfly valve is a flow control device, which is used to regulate the fluid flowing through a piping system. Analysis and optimization are of special importance in the design and usage of butterfly valves. A proper selection of a Butterfly valve would require the knowledge of its characteristics and robustness. Normally this information used to be obtained from experimental tests. However the...

Nowadays, numerical analysis becames more and more popular in designing large butterfly valve. In this paper, fluid structure interface(FSI) analysis is carried out to estimate fluid field and performance of large butterfly valve in diameter of 2.2m. A three-dimensional model of butterfly valve is used to do simulation perfectly. The FSI analysis not only analyzes the fluid field at various val...

Butterfly valves are commonly used as control equipments in applications where the pressure drops required of the valves are relatively low. As shutoff valve (on/off service) or throttling valves (for flow or pressure control), the higher performance and the better precision of butterfly valves are required. Thus it’s more and more essential to know the flow characteristic around the valve. Due...

OBJECTIVE To evaluate the effect on snoring of structural nasal valve dilatation with butterfly spreader grafts in patients with nasal valve insufficiency. DESIGN Retrospective medical chart review and telephone follow-up; mean +/- SD follow-up time, 20.7 +/- 11.34 months (range, 3-48 months). SETTINGS Tertiary care referral center. SUBJECTS A total of 37 snoring patients with nasal valve...

1. Abstract Nowadays, the use of computational fluid dynamics (CFD) in the design of valves is very common. Despite the continuing growth of computing capability, the computational cost of complex three-dimensional CFD analysis of butterfly valve maintains high, therefore, the CFD analysis-based optimization becomes more time-consuming and computational expensive. In this paper, a comparative s...

In water supply systems, One of the most important components as safety unit and the current controller (Switching flow and regulate the amount of flow) used in the arrangement of lines of water. In this study, according to multiple ponds in Tanguiyeh dam water pipeline to industrial and mining company Gol Gohar Sirjan Butterfly valve used in these ponds using Fluent software simulation has bee...