A valve is a mechanical device which controls the fluid flow through system by changing the flow area. Flow rate & pressure drop across valve are of utmost importance for optimum valve performance. But many time pressure within valve drops below vapor pressure value, which results into valve cavitation & pressure wave. Valve cavitation leads to damage to various valve components. CFD offers a safe, reliable and cost + time saving solution to various issues of valves. CFD helps to estimate the flow performance of the valve beforehand and optimize the design accordingly.