Girish B. Pawar, Jayashri P. Wagh, Vaibhav L. Jadhav and Piraji T. Rupnur
Butterfly valve is a valve which can be used for isolating or regulating flow. A butterfly valve typically consists of a metal disc formed around a central shaft, which acts as its axis of rotation. Operation is similar to that of a ball valve, which allows for quick shut off. As the valve's opening angle is increased from 0 degrees (fully closed) to 90 degrees (fully open), fluid is able to move readily flow past the valve. There are some problems in the operation of Butterfly valve. The major problem related with Butterfly valve is Pressure drop and Flow loss. Pressure drop occurs when disc is rotated from fully closed condition to fully open condition (from 0o to 90o by sub steps of 10o), cavitation takes place at downstream of flow at backside of disc. So, automatically Flow loss is increased and its performance is reduced. This problem can be reduced by giving various shapes(Aerodynamic) to the backside of disc. Due to such design, fluid will easily flow over the disc. So, its performance can be improved.
Pressure drop, Flow loss, Cavitation, Aerodynamic Shape.