Proportional fluid valve for a hydraulic circuit of a piece of equipment of an aircraft and comprising: - a hollow valve body comprising an inlet, two outlets and three communications (21; 25), each one of them being able to fluidically connect the hollow of the valve body towards an external pressure; - a solenoid electrical actuator located in the hollow of the hollow valve body and comprising a movable ferromagnetic pilot connected to a spring; - a movable valve member, able to describe a travel in the hollow of the valve body, and comprising three mechanically coupled portions, said valve member defining at least partially a first and a second cavity located on either side of said valve member in the hollow of the valve body, said valve member also defining at least partially a third and a fourth cavity in the hollow of the valve body located between said first and a second cavity, said first, second, third and fourth cavities each being delimited at least partially by some of said three portions of said valve member in such a way that: o a first of the three portions delimits at least partially said second and said third cavities, said first of the three portions being movable in the valve body to block at least partially a passage between said inlet and one of the two outlets; o a second of the three portions delimits at least partially said third and fourth cavities, comprises a longitudinal hole to place in fluidic communication the third and fourth cavities, said pilot comprising a protuberance located in the third cavity and a protuberance in the fourth cavity; o a third of the three portions delimits at least partially said first and fourth cavities, said fluid valve further comprising: - a first conduit to fluidically connect said second and fourth cavities, - a second conduit to fluidically connect said first and third cavities, said first and second conduits being fluidically connected by said longitudinal hole passing through said second of the three portions, when the latter is not blocked, said first cavity containing said solenoid electrical actuator; said first cavity is connected to an external pressure by a communication comprising a fixed restriction; said second cavity is connected to an external pressure by a communication comprising a fixed restriction; said third cavity is connected to an external pressure by a communication; said fluid valve being configured in such a way that a movement of said movable pilot in the third cavity induces a variation in pressure in each one of said first and second cavities by means of the second and first conduits respectively to create a movement force on said valve member to vary a flow rate of fluid between the inlet and the two outlets. - a hollow valve body comprising an inlet, two outlets and three communications (21; 25), each one of them being able to fluidically connect the hollow of the valve body towards an external pressure; - a solenoid electrical actuator located in the hollow of the hollow valve body and comprising a movable ferromagnetic pilot connected to a spring; - a movable valve member, able to describe a travel in the hollow of the valve body, and comprising three mechanically coupled portions, said valve member defining at least partially a first and a second cavity located on either side of said valve member in the hollow of the valve body, said valve member also defining at least partially a third and a fourth cavity in the hollow of the valve body located between said first and a second cavity, said first, second, third and fourth cavities each being delimited at least partially by some of said three portions of said valve member in such a way that: o a first of the three portions delimits at least partially said second and said third cavities, said first of the three portions being movable in the valve body to block at least partially a passage between said inlet and one of the two outlets; o a second of the three portions delimits at least partially said third and fourth cavities, comprises a longitudinal hole to place in fluidic communication the third and fourth cavities, said pilot comprising a protuberance located in the third cavity and a protuberance in the fourth cavity; o a third of the three portions delimits at least partially said first and fourth cavities, said fluid valve further comprising: o a first of the three portions delimits at least partially said second and said third cavities, said first of the three portions being movable in the valve body to block at least partially a passage between said inlet and one of the two outlets; o a second of the three portions delimits at least partially said third and fourth cavities, comprises a longitudinal hole to place in fluidic communication the third and fourth cavities, said pilot comprising a protuberance located in the third cavity and a protuberance in the fourth cavity; o a third of the three portions delimits at least partially said first and fourth cavities, - a first conduit to fluidically connect said second and fourth cavities, - a second conduit to fluidically connect said first and third cavities,