The biggest advantage of the DC piston valve U45 UJ45 is that the medium flows within the balance, and the turning angle is less. According to the determination of the flow resistance coefficient of the three types of globe valves, DN100mm, the flow resistance coefficient of the straight-through globe valve is 4.1, the flow resistance coefficient of DN100mm angle globe valve is 3.8, and the flow resistance coefficient of DN100mm DC globe valve is 0.5, and the resistance is greatly reduced.