Air release valve

The design is the visual features of the AIR RELEASE VALVE shown in the drawings, whether those features are features of shape, configuration, ornament or pattern, or a combination of any of those features. The portions of the article shown in stippled lines do not form part of the design. Drawings of the design are enclosed, in which: FIGURE 1 is a perspective view of the AIR RELEASE VALVE; FIGURE 2 is a rear perspective view of the AIR RELEASE VALVE shown in Figure 1; FIGURE 3 is a side elevational view of the AIR RELEASE VALVE as seen from the plane indicated by the line 3-3 in Figure 5; FIGURE 4 is a side elevational view of the AIR RELEASE VALVE, as seen from the plane indicated by the line 4-4 in Figure 5; FIGURE 5 is a front elevational view of the AIR RELEASE VALVE shown in Figure 1; FIGURE 6 is a rear elevational view of the AIR RELEASE VALVE shown in Figure 1; FIGURE 7 is a top plan view of the AIR RELEASE VALVE shown in Figure 1; and FIGURE 8 is bottom plan view of the AIR RELEASE VALVE shown in Figure 1.