The ornamental design for a tee-shaped ball valve, as shown and described.
FIG. 1 is a perspective view of a tee-shaped ball valve showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is bottom plan view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a right side elevation view thereof
FIG. 6 is a front elevation view thereof; and,
FIG. 7 is a rear elevation view bottom view thereof.
The broken lines shown in the drawings are for the purpose of illustrating portions of the tee-shaped ball valve and form no part of the claimed design.