Vertical Test Bench
For all valves that are stored vertically (i.e flow axis vertical & stem horizontal), vertical test benches are most suited.
And, for wafer type valves in which the disc protrudes when the valve is opened, spacers are required. These spacers have to be placed on the bench and then the valve has to be placed. Having a vertical test bench saves you from the hassle of fastening these spacers to the bench.