Abstract: A seal (6), which is intended for a valve (1) comprising a body (3) and a shutter element (4) movable in a bore (31) of the body under an action of a drive shaft (5), includes at least one elastomeric ring segment (8) having a passage opening (81, 83) for the drive shaft (5). The elastomeric ring segment comprises a surrounding portion (82, 84) arranged around the passage opening (81, 83) and lateral arms (86, 88) which extend in the circumferential direction of the ring while being each connected to the surrounding portion. Starling from each junction (89) between the surrounding portion (82, 84) and a lateral arm (86, 88), the surrounding portion flares outwardly in an axial direction (X-X?) of the ring relative to the lateral arm.