The invention relates to a fluid flow valve, particularly for a motor vehicle. Said fluid flow valve comprises a body (2), capable of having said fluid pass therethrough; and a sealing means (3), placed in said body, capable of occupying different angular positions by rotation of said sealing means (3) relative to said body (2). Said sealing means (3) is configured so as to enable, in a first angular position, the fluid to pass from a first inlet (6) to a first outlet (21) of the valve and from a second inlet (22) to a second outlet (7) of the valve, and, in a second angular position, to enable the fluid to pass from the first inlet (6) to the second outlet (7) through the body (2). Said sealing means (3) is also configured so as to ensure a gradual closing of the first inlet (6).