I claim the ornamental design for a multi-port valve, as shown and described.
FIG. 1 is a top perspective view of a multi-port valve showing my new design;
FIG. 2 is a top front perspective view of the multi-port valve of FIG. 1;
FIG. 3 is a front perspective view of the multi-port valve of FIG. 1;
FIG. 4 is a side perspective view of the multi-port valve of FIG. 1;
FIG. 5 is a rear perspective view of the multi-port valve of FIG. 1; and,
FIG. 6 is a top rear perspective view of the multi-port valve of FIG. 1.
The broken line showing in the figures is included for the purpose of illustrating portions of the multi-port valve and forms no part of the claimed design.