The ornamental design for a valveplug of a valve for a samplecollectiondevice, as shown and described.
FIG. 1 is a cross-sectional view of a valve plug of a valve for a sample collection device taken along line 1-1 of FIG. 2 shown within the environment of a sample collection device;
FIG. 2 is a front side view of the valve plug of a valve for a sample collection device with the environment removed for ease of illustration;
FIG. 3 is a top perspective view thereof;
FIG. 4 is a bottom perspective view thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.
In FIG. 1, the broken lines depicting the sample collection device represent environmental structure; the broken lines and the circular border form no part of the claimed design.