The ornamental design for a vacuumpumpfluidtank, as shown and described.
FIG. 1 is a front elevational view of a vacuum pump fluid tank showing my new design;
FIG. 2 is a right side elevation view thereof;
FIG. 3 is a left side elevation view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof; and,
FIG. 6 is a rear elevational view thereof.
The broken line showing of openings and a base is included for the purpose of illustrating environmental matter and forms no part of the claimed design.