Development of the offshore industry lead to make domestic equipment due to increased demand. High pressure valve have two main function in drill string. One is blocking backdraft of mud at when pipe exchange. The other is protecting top drive machine from high pressure of gas & oil at emergency situation like well explosion. This study shows development of high pressure valves new working concept. Safety and reliability is important factor because of high demand of stability. Through this study we worked failure proof analysis through RBD & FMEA at early design stage. Through this study localization and the world market of high pressure valves installed in the Topside is expected.