ohk, let me make it more clear for you,
the situation is we have a boiler generating steam at 23.5 barg, which is throtlled down to 12 barg for import/ export, this 23.5 barg steam is throttled down to 3 barg by another valve to use in heat exchanger, and then this 23.5 barg steam is throttled...
so that means if i have a throtlling valve which decreases the pressure to 0.2 bar from 23 bar of steam, and i am planning to have an arrangement that will give 0.2 bar from 12 bar of steam, which is more beneficial and why, if possible prove by calculation.