The ornamental design for a ballvalve with integralelbow, as shown and described.
FIG. 1 is a perspective view of a ball valve with integral elbow embodying the present invention;
FIG. 2 is a bottom view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a first side view thereof;
FIG. 5 is a second side view thereof
FIG. 6 is a rear view thereof; and,
FIG. 7 is a front view thereof.
The broken lines shown in the figures are for the purpose of illustrating portions of the ball valve with integral elbow and form no part of the claimed design.