A wheel member (20,21,22) for a turbomachine comprising: a body having an axis and including a first surface and a second surface, wherein the body extends through an intermediate portion from the first surface to the second surface, wherein the first surface and the second surface are opposed first and second axial front side surfaces of the body, the body further including an outer diametric surface and a central bore; a first plurality of purge circuits formed in the body, the first plurality of purge circuits extending from a first end to a second end through the body from the first axial front side surface to the second axial side front surface, the first plurality of purge circuits being arranged to direct a first purge flow in a first direction; and a second plurality of purge circuits formed in the body and fluidly isolated from the first plurality of purge circuits, the second plurality of purge circuits extending from a first end portion to a second end portion through the body from the first axial front side surface to the second axial front side surface, and being arranged to direct a second purge flow in a second direction, that is distinct from the first direction, to establish a cross-over purge flow, characterized in comprising: an inlet channel formed on the side of the second axial front side surface and extending from the first end of each of the first plurality of purge circuits toward the outer diametric surface, an outlet channel formed on the side of the first axial front side surface and extending from the second end of each of the first plurality of purge circuits toward the central bore, an inlet passage formed on the side of the second axial front side surface and extending from the first end portion of each of the second plurality of purge circuits toward the central bore, and an outlet passage formed on the side of the first axial front side surface and extending from the second end portion of each of the second plurality of purge circuits toward the outer diametric surface. a body having an axis and including a first surface and a second surface, wherein the body extends through an intermediate portion from the first surface to the second surface, wherein the first surface and the second surface are opposed first and second axial front side surfaces of the body, the body further including an outer diametric surface and a central bore; a first plurality of purge circuits formed in the body, the first plurality of purge circuits extending from a first end to a second end through the body from the first axial front side surface to the second axial side front surface, the first plurality of purge circuits being arranged to direct a first purge flow in a first direction; and a second plurality of purge circuits formed in the body and fluidly isolated from the first plurality of purge circuits, the second plurality of purge circuits extending from a first end portion to a second end portion through the body from the first axial front side surface to the second axial front side surface, and being arranged to direct a second purge flow in a second direction, that is distinct from the first direction, to establish a cross-over purge flow, characterized in comprising: an inlet channel formed on the side of the second axial front side surface and extending from the first end of each of the first plurality of purge circuits toward the outer diametric surface, an outlet channel formed on the side of the first axial front side surface and extending from the second end of each of the first plurality of purge circuits toward the central bore, an inlet passage formed on the side of the second axial front side surface and extending from the first end portion of each of the second plurality of purge circuits toward the central bore, and an outlet passage formed on the side of the first axial front side surface and extending from the second end portion of each of the second plurality of purge circuits toward the outer diametric surface. an inlet channel formed on the side of the second axial front side surface and extending from the first end of each of the first plurality of purge circuits toward the outer diametric surface, an outlet channel formed on the side of the first axial front side surface and extending from the second end of each of the first plurality of purge circuits toward the central bore, an inlet passage formed on the side of the second axial front side surface and extending from the first end portion of each of the second plurality of purge circuits toward the central bore, and an outlet passage formed on the side of the first axial front side surface and extending from the second end portion of each of the second plurality of purge circuits toward the outer diametric surface.