Hydro Test Manifold - Capacity of 10000 PSI and 20000 PSI

Dunno how to answer your query! honestly surprised. Please understand that things are not just reading a manual and making the stuff. Do not think that what you want to make is same as some Chinese Stuff, you will have a one page pictographic instruction manual. The pressure you are talking about if 700Bar & 1400 Bars. I suggest you go to an Expert designer in pressure vessels & pipes or an Engineering Company who may help you out. Reading and understanding ASME B31.3 maybe a good starting point for you to begin the learning process.