Hydraulic section for use in a hydraulic distributor, comprising: a valve body; a main spool that is longitudinally slidable within said valve body between a neutral position in which it blocks the passage of fluid towards a first chamber, and an operational position in which it enables passage of the pressurised fluid coming from a feed line (Pal) of a pump towards the first chamber to work ports (A, B) through a metering orifice; pressure compensation means situated downstream of said main spool with respect to the path of the fluid, said first chamber representing the front chamber of the pressure compensation means; a first hole obtained in said valve body, said first hole housing the pressure compensation means; a piston housed in said first hole; a closure plug for closing said first hole; an intermediate chamber extending at least partially in said first hole and being delimited by a rod of the piston, said intermediate chamber being in fluid communication with the feed line (Pal); control means (6, 7, 18) comprising at least one drainage channel pertaining to said intermediate chamber, said control means (6, 7, 8) being operatively active on said intermediate chamber for altering the pressure thereof in such a manner that the piston forces said compensation means to shift from a first configuration, in which the passage of fluid is enabled from the first chamber to a first distributor bridge located downstream of the compensator and a substantially constant pressure drop is maintained through said metering orifice, to a second configuration, in which this passage of fluid is interrupted or limited, characterised in that the hydraulic section also comprises: a rear chamber in addition to the intermediate chamber and defined between said closure plug, a base of the piston and the walls of the valve body delimiting the first hole or the internal walls of a liner enclosing the piston; a front chamber in addition to the intermediate chamber and the rear chamber and defined between the compensation means, a head of said piston and the walls of the valve body delimiting the first hole or the internal walls of a liner enclosing the piston; a passage for fluid afforded in the rod of the piston, said passage for fluid setting the intermediate chamber in communication with the rear chamber, said piston being subject to the action of the pressure of three active areas so defined: - in the rear chamber, an active area represented by the surface of the base; - in the front chamber, an active area represented by the surface of the head of the piston; - in the intermediate chamber, an active area given by the annulus obtained as the difference between the surface of the base and the surface of the head of the piston. a valve body; a main spool that is longitudinally slidable within said valve body between a neutral position in which it blocks the passage of fluid towards a first chamber, and an operational position in which it enables passage of the pressurised fluid coming from a feed line (Pal) of a pump towards the first chamber to work ports (A, B) through a metering orifice; pressure compensation means situated downstream of said main spool with respect to the path of the fluid, said first chamber representing the front chamber of the pressure compensation means; a first hole obtained in said valve body, said first hole housing the pressure compensation means; a piston housed in said first hole; a closure plug for closing said first hole; an intermediate chamber extending at least partially in said first hole and being delimited by a rod of the piston, said intermediate chamber being in fluid communication with the feed line (Pal); a rear chamber in addition to the intermediate chamber and defined between said closure plug, a base of the piston and the walls of the valve body delimiting the first hole or the internal walls of a liner enclosing the piston; a front chamber in addition to the intermediate chamber and the rear chamber and defined between the compensation means, a head of said piston and the walls of the valve body delimiting the first hole or the internal walls of a liner enclosing the piston; a passage for fluid afforded in the rod of the piston, said passage for fluid setting the intermediate chamber in communication with the rear chamber, said piston being subject to the action of the pressure of three active areas so defined: - in the rear chamber, an active area represented by the surface of the base; - in the front chamber, an active area represented by the surface of the head of the piston; - in the intermediate chamber, an active area given by the annulus obtained as the difference between the surface of the base and the surface of the head of the piston. - in the rear chamber, an active area represented by the surface of the base; - in the front chamber, an active area represented by the surface of the head of the piston; - in the intermediate chamber, an active area given by the annulus obtained as the difference between the surface of the base and the surface of the head of the piston.