The valves are designed in 3D design environment, leveraging the power of Finite Element Analysis (FEA) and Computational Fluid Dynamics (CFD). The designs of high pressure valves were successfully validated by conducting in-house High Pressure High Temperature (HPHT) Gas Tests, witnessed by an international certification agency. Further, Flow Interruption Test was successfully conducted on a Pressure-seal Gate Valve suitable for power plant Main Stream Isolation Valve (MSIV) application.