FIG. 1 is a top plan view of a first embodiment of a sanitary outlet valve in accordance with my design;
FIG. 2 is a top, front, left perspective view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a bottom, front, left perspective view thereof;
FIG. 5 is a front elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a rear elevational view thereof; and
FIG. 8 is a left side elevational view thereof;
FIG. 9 is a top plan view of a second embodiment of a sanitary outlet valve in accordance with my design;
FIG. 10 is a top, front, left perspective view thereof;
FIG. 11 is a bottom plan view thereof;
FIG. 12 is a bottom, front, left perspective view thereof;
FIG. 13 is a front elevational view thereof;
FIG. 14 is a right side elevational view thereof;
FIG. 15 is a rear elevational view thereof; and
FIG. 16 is a left side elevational view thereof;
FIG. 17 is a top plan view of a third embodiment of a sanitary outlet valve in accordance with my design;
FIG. 18 is a top, front, left perspective view thereof;
FIG. 19 is a bottom plan view thereof;
FIG. 20 is a bottom, front, left perspective view thereof;
FIG. 21 is a front elevational view thereof;
FIG. 22 is a right side elevational view thereof;
FIG. 23 is a rear elevational view thereof; and,
FIG. 24 is a left side elevational view thereof.
The broken lines shown in the figures represent portions of the sanitary outlet valve that form no part of the claimed design.