Final answer:
On a globe valve used for feed piping, the inlet should be positioned above the valve disc to ensure proper operation and sealing.
Step-by-step explanation:
In regard to a globe valve used on feed piping, the correct position for the inlet is above the valve disc. This is because globe valves are designed to close against the fluid flow, ensuring that the pressure differential helps to seal the valve more tightly and prevent leakage. When the inlet is above the disc, any fluid pressure will assist the disc to stay in the closed position, which is essential for effective throttling and reducing the possibility of fluid hammer. Additionally, this orientation ensures that the fluid exerts less stress on the valve stem, as it pushes the disc against the valve seat.