We claim the ornamental design for a non-return device valve member, as shown and described.
FIG. 1 is a perspective view of a non-return device valve member showing our new design.
FIG. 2 is a Lop plan view of the non-return device valve member shown in FIG. 1.
FIG. 3 is a bottom plan view of the non-return device valve member shown in FIG. 1.
FIG. 4 is a right side view of the non-return device valve member shown in FIG. 1.
FIG. 5 is a left side view of the non-return device valve member shown in FIG. 1.
FIG. 6 is a front elevational view of the non-return device valve member shown in FIG. 1; and,
FIG. 7 is a rear elevational view of the non-return device valve member shown in FIG. 1.
The broken lines in the drawings are included for the purpose of illustrating portions of the non-return device valve member and form no part of the claimed design.