A valve is a mechanical device which controls the fluid flow through system by changing the flow area & thus increasing the resistance across valve. Therefore flow rate & pressure drop across valve are of utmost importance for optimum valve performance. Valves are an instrumental component of industries such as chemical, processing, mining, plastic manufacturing and many other fields due to multiple availability of valve types and designs. CFD offers a safe, reliable and cost + time saving solution to the testing of various working parameters of valves. CFD helps to estimate the flow performance of the valve beforehand and optimize the design accordingly.