FIG. 1 is a top perspective view of a first embodiment of a valve for fluids, especially for the medical technique of the present invention;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a first side view thereof, wherein the second side view is a mirror image thereof;

FIG. 7 is a top perspective view of a second embodiment of a valve for fluids, especially for the medical technique of the present invention;

FIG. 8 is a top view thereof;

FIG. 9 is a bottom view thereof;

FIG. 10 is a front view thereof;

FIG. 11 is a rear view thereof;

FIG. 12 is a first side view thereof, wherein the second side view is a mirror image thereof;

FIG. 13 is a top perspective view of a third embodiment of a valve for fluids, especially for the medical technique of the present invention;

FIG. 14 is a top view thereof;

FIG. 15 is a bottom view thereof;

FIG. 16 is a front view thereof;

FIG. 17 is a rear view thereof;

FIG. 18 is a first side view thereof, wherein the second side view is a mirror image thereof;

FIG. 19 is a top perspective view of one embodiment of a valve for fluids, especially for the medical technique of the present invention;

FIG. 20 is a top view thereof;

FIG. 21 is a bottom view thereof;

FIG. 22 is a front view thereof;

FIG. 23 is a rear view thereof; and,

FIG. 24 is a first side view thereof, wherein the second side view is a mirror image thereof.

The ornamental design which is claimed is shown in solid lines in the drawings. Any broken lines in the drawings are for illustrative purposes only and form no part of the claimed design.