The ornamental design for a flowadjustingvalve, as shown and described.
FIG. 1 is a front view of the flow adjusting valve.
FIG. 2 is a rear view of the flow adjusting valve.
FIG. 3 is a top view of the flow adjusting valve.
FIG. 4 is a bottom view of the flow adjusting valve.
FIG. 5 is a left side view of the flow adjusting valve; and,
FIG. 6 is a right side view of the flow adjusting valve.
The broken lines in the drawings depict environmental structure, which forms no part of the claimed design. Dash-dot lines in the drawings represent the boundary of the claimed design.