Shut-off member for a fluid valve, and method for producing a shut-off member

A Shut-off member for a fluid valve, the shut-off member comprising:

• a dorsal portion comprising a membrane portion;
• a ventral portion joined to the membrane portion, wherein the ventral portion is made of a first material, and wherein the ventral portion comprises an outer diameter increasing in a distal direction of the ventral portion;
• a blind hole extending from a dorsal side of the shut-off member at least into the outer diameter increase of the ventral portion,
• wherein the blind hole comprises an undercut in a bottom area;
• transponder that is arranged in the bottom area of the blind hole of the ventral portion, wherein an identifier of the shut-off member that is stored on a non-transitory electronic data carrier of the transponder is readable through a distal end of the ventral portion;
• and
• a casting compound that is introduced into the blind hole and that fixes the transponder arranged in the bottom area of the blind hole to the ventral portion of the shut-off member, wherein the casting compound is made of a second material different from the first material of the ventral portion, wherein the casting compound is in direct contact with an inner surface of the blind hole of the ventral portion, wherein the casting compound engages in an interlocking manner in the undercut, and wherein the casting compound and the transponder are fixed to one another in an interlocking manner.