Pressure relief valve

Description

FIG. 1 is a perspective view of a pressure relief valve showing my new design;

FIG. 2 is a right elevation view;

FIG. 3 is a left elevation view;

FIG. 4 is a top plan view; and,

FIG. 5 is a bottom plan view.

In the drawings, the broken lines shown in the Figures depict environmental subject matter only and form no part of the claimed design.

Claims

The ornamental design for a pressure relief valve, as shown and described.