An automatic double-acting valve for high pressure pumps comprising: - a valve body, - a central duct of the pass-through type, which passes through the valve body and is equipped with a first opening made in a first end of the valve body and a second opening made in an opposite second end of the valve body, - a peripheral duct made in the valve body, eccentric with respect to the central duct and equipped with a first opening, made in a side surface of the valve body comprised between the first end and the second end, and a second opening made in the second end of the valve body, - a first blocking body movable at least between a closed position, in which it hermetically obstructs the first opening of the central duct, and an open position, in which it is spaced from the first opening of the central duct and allows the passage of flow through the first opening itself, - a first elastic element configured to generate a force adapted to keep the first blocking body in the closed position, - a second blocking body movable at least between a closed position, in which it hermetically obstructs the second opening of the peripheral duct, and an open position, in which it is spaced from the second opening of the peripheral duct and allows the passage of flow through the second opening itself, and - a second elastic element configured to generate a force adapted to keep the second blocking body in the closed position, characterized in that the valve body comprises a first portion equipped with the first opening of the central duct, a second portion equipped with the second opening of the central duct and the second opening of the peripheral duct, and a third portion interposed between the first portion and the second portion, which is equipped with the first opening of the peripheral duct and which is made of a material having a surface hardness lower than the material with which the first portion and second portion are made. - a valve body, - a central duct of the pass-through type, which passes through the valve body and is equipped with a first opening made in a first end of the valve body and a second opening made in an opposite second end of the valve body, - a peripheral duct made in the valve body, eccentric with respect to the central duct and equipped with a first opening, made in a side surface of the valve body comprised between the first end and the second end, and a second opening made in the second end of the valve body, - a first blocking body movable at least between a closed position, in which it hermetically obstructs the first opening of the central duct, and an open position, in which it is spaced from the first opening of the central duct and allows the passage of flow through the first opening itself, - a first elastic element configured to generate a force adapted to keep the first blocking body in the closed position, - a second blocking body movable at least between a closed position, in which it hermetically obstructs the second opening of the peripheral duct, and an open position, in which it is spaced from the second opening of the peripheral duct and allows the passage of flow through the second opening itself, and - a second elastic element configured to generate a force adapted to keep the second blocking body in the closed position, a first portion equipped with the first opening of the central duct, a second portion equipped with the second opening of the central duct and the second opening of the peripheral duct, and a third portion interposed between the first portion and the second portion, which is equipped with the first opening of the peripheral duct and which is made of a material having a surface hardness lower than the material with which the first portion and second portion are made.