The ornamental design for the valving element for butterfly valve, as shown and described.
FIG. 1 a front perspective view of a valving element for butterfly valve showing my new design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a left side view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a cross-sectional view taken along line 8—8 of FIG. 3; and,
FIG. 9 is a cross-sectional view taken along line 9—9 of FIG. 3.
The dashed lines in the drawings represent unclaimed portions of the valving element and form no part of the claimed design. The dashed-dot lines in the drawings are boundary lines that define the claimed and unclaimed areas of the valving element, and form no part of the claimed design.